Document:

<Page>

                                                                     Exhibit 4.1

             VOTING, SUPPORT AND EXCHANGE TRUST AGREEMENT SUPPLEMENT
             -------------------------------------------------------

         THIS VOTING, SUPPORT AND EXCHANGE TRUST AGREEMENT SUPPLEMENT is made as
of _____________________, 2001,

AMONG:

                    BARRICK GOLD CORPORATION,
                    a corporation governed by the
                    laws of the Province of Ontario,
                    ("Barrick")

                             - and -

                    HOMESTAKE MINING COMPANY,
                    a corporation governed by the
                    laws of the State of Delaware,
                    ("Homestake")

                             - and -

                    HOMESTAKE CANADA INC.,
                    a corporation governed by the laws
                    of the Province of Ontario,
                    ("HCI")

                             - and -

                    HOMESTAKE CANADA HOLDINGS COMPANY, an unlimited
                    liability company governed by the laws of the
                    Province of Nova Scotia, ("Homestake ULC")

                             - and -

                    COMPUTERSHARE TRUST COMPANY OF CANADA, a trust
                    company existing under the federal laws of Canada,
                    (the "Trustee" or "Computershare")

                             - and -

                    MONTREAL TRUST COMPANY OF CANADA,
                    a trust company existing under the federal laws of Canada,
                    (the "Original Trustee" or "Montreal Trust")

<Page>

                                      -2-

RECITALS:

                  HCI is the issuer of certain shares (the "Exchangeable
Shares"), which are currently exchangeable into shares of common stock of
Homestake ("Homestake Common Stock"), on a one-for-one basis.

                  Homestake, HCI and the Original Trustee entered into a voting,
support and exchange trust agreement dated as of December 2, 1998 (the "Original
Trust Agreement") to establish certain procedures relating to the HCI
Exchangeable Share structure, including, among other things, the procedures
whereby the Trustee may exercise certain voting rights and exchange rights on
behalf of holders of the Exchangeable Shares.

                  Pursuant to an agreement and plan of merger dated as of June
24, 2001 as amended by an amendment dated as of October 19, 2001 (the "Merger
Agreement") among Barrick, Homestake and a wholly-owned subsidiary of Barrick
("Homestake Merger Co."), it is proposed that Homestake Merger Co. merge with
and into Homestake (the "Merger") with the result that Homestake will continue
as the surviving corporation and become a wholly-owned indirect subsidiary of
Barrick.

                  Under the Merger, each outstanding share of Homestake Common
Stock not owned by Barrick or Homestake will be changed and converted into the
right to receive 0.53 common shares of Barrick ("Barrick Common Shares") and
each outstanding Exchangeable Share will remain outstanding, but will, at and
after the effective time of the Merger, be exchangeable for 0.53 Barrick Common
Shares.

                  Pursuant to Sections 11.1, 11.2 and 12.4 of the Original Trust
Agreement, as a result of the Merger, the Original Trust Agreement must be
amended, modified and supplemented as necessary in order that it shall apply
with full force and effect, mutatis mutandis, to the Barrick Common Shares, and
the parties to the Original Trust Agreement are required to execute and deliver
this voting, support and exchange trust supplement in order to give effect to
and evidence such necessary amendments and modifications.

                  Barrick, Homestake and Homestake Merger Co. propose to
complete the Merger immediately following the execution and delivery of this
voting, support and exchange trust supplement by the parties hereto.

                  The board of directors of Homestake and the board of directors
of HCI are each of the opinion that the amendments and modifications to be
effected hereby are not inconsistent with the Original Trust Agreement, are
necessary and desirable in light of the Merger and will not be prejudicial to
the interests of the holders of the Exchangeable Shares.

                  NOW THEREFORE, for good and valuable consideration, the
receipt and sufficiency of which is hereby acknowledged, the parties agree as
follows:

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                                      -3-

                                   ARTICLE 1
                  DEFINITIONS AND PRINCIPLES OF INTERPRETATION
                  --------------------------------------------

1.1      DEFINITIONS
         -----------

                  All capitalized terms used herein which are defined in the
Original Trust Agreement shall have the respective meanings set forth therein,
except as otherwise defined herein. Whenever used herein, the following words
and terms have the meanings set forth below:

         "AGREEMENT" means this voting, support and exchange trust agreement
         supplement, including all amendments or restatements as permitted, and
         references to "Article" or "Section" mean the specified Article or
         Section of this Agreement;

         "MERGER" has the meaning ascribed to it in the Recitals;

         "ORIGINAL TRUST AGREEMENT" has the meaning ascribed to it in the
         Recitals;

         "TRUSTEE CHANGE EFFECTIVE DATE" has the meaning ascribed to it in
         Section 4.1 hereof; and

         "VOTING SHARE" has the meaning ascribed to it in Section 2.1 hereof.

1.2      CERTAIN RULES OF INTERPRETATION
         -------------------------------

                  In this Agreement:

         (a)      GOVERNING LAW - This Agreement is a contract made under and
                  shall be governed by and construed in accordance with the laws
                  of the Province of Ontario and the federal laws of Canada
                  applicable in the Province of Ontario.

         (b)      HEADINGS - Headings of Articles and Sections are inserted for
                  convenience of reference only and shall not affect the
                  construction or interpretation of this Agreement.

         (c)      NO STRICT CONSTRUCTION - The language used in this Agreement
                  is the language chosen by the parties to express their mutual
                  intent, and no rule of strict construction shall be applied
                  against any party.

         (d)      NUMBER AND GENDER - Unless the context otherwise requires,
                  words importing the singular include the plural and vice versa
                  and words importing gender include all genders.

         (e)      SEVERABILITY - If, in any jurisdiction, any provision of this
                  Agreement or its application to any party or circumstance is
                  restricted, prohibited or unenforceable, such provision shall,
                  as to such jurisdiction, be ineffective only to the extent of
                  such restriction, prohibition or unenforceability without
                  invalidating the remaining provisions of this Agreement and
                  without affecting the validity or

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                                      -4-

                  enforceability of such provision in any other jurisdiction or
                  without affecting its application to other parties or
                  circumstances.

         (f)      TIME - Time is of the essence in the performance of the
                  parties' respective obligations.

1.3      SCOPE OF AGREEMENT
         ------------------

                  This Agreement is supplementary to and amends and modifies the
Original Trust Agreement as herein set forth. Immediately upon the Merger
becoming effective under the Delaware General Corporation Law, the Original
Trust Agreement shall thereafter be read in conjunction with this Agreement and
this Agreement shall be deemed for all purposes to be a part of the Original
Trust Agreement and shall have effect so far as is practicable as if all the
provisions of the Original Trust Agreement and this Agreement were contained in
one and the same instrument.

                  This Agreement and the Original Trust Agreement constitute the
entire agreement between the parties relating to the subject matter hereof and
thereof. This Agreement supersedes all prior agreements and understandings of
the parties, whether oral or written, including the Original Trust Agreement,
with respect to the portions of the Original Trust Agreement hereby amended,
modified and supplemented. There are no general or specific representations,
warranties or other agreements by or among the parties in connection with the
entering into of this Agreement or the subject matter hereof except as
specifically set forth herein.

                                   ARTICLE 2
                            COVENANTS OF THE PARTIES
                            ------------------------

2.1      ISSUANCE OF BARRICK SPECIAL VOTING SHARE
         ----------------------------------------

                  As of the time that the Merger becomes effective under the
Delaware General Corporation Law, (a) Barrick shall issue to and deposit with
the Trustee the first preferred share, series C special voting share of Barrick
(the "Voting Share") to be thereafter held of record by the Trustee as trustee
for and on behalf of, and for the use and benefit of, the Non-Affiliated Holders
and in accordance with the provisions of the Original Trust Agreement as
amended, modified and supplemented by this Agreement, and (b) the Trustee shall
surrender to Homestake the certificate formerly representing the one share of
special voting stock of Homestake, par value U.S.$1.00, previously issued by
Homestake to the Trustee. Barrick hereby acknowledges receipt from the Trustee
as trustee for and on behalf of the Non-Affiliated Holders of good and valuable
consideration (and the adequacy thereof) for the issuance of the Voting Share by
Barrick to the Trustee.

2.2      ASSUMPTION OF OBLIGATIONS
         -------------------------

                  Barrick hereby confirms, covenants and agrees and each of the
other parties hereto acknowledges and confirms that, immediately upon the Merger
becoming effective under the Delaware General Corporation Law, by virtue of this
Agreement, Barrick has succeeded to the position of Homestake under the Original
Trust Agreement (as amended, modified and supplemented hereby) and, without
limiting the generality of the foregoing, that it has assumed

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                                      -5-

liability for all moneys payable and property deliverable under the Original
Trust Agreement (as amended, modified and supplemented hereby), and that it will
pay and deliver or cause to be paid and delivered all such moneys and property
and will observe and perform all the covenants and obligations of Homestake
under the Original Trust Agreement (as amended, modified and supplemented
hereby). Each of the parties hereto acknowledges and agrees that Barrick is the
Homestake Successor, as that term is defined in the Original Trust Agreement,
for all purposes of the Original Trust Agreement (including as such agreement is
amended, modified and supplemented hereby) and is the successor corporation to
Homestake, as contemplated by the definition of "Homestake" in the Exchangeable
Share Provisions, for all purposes of the Exchangeable Share Provisions.

2.3      WAIVER OF DIVIDEND ENTITLEMENT; RETURN OF VOTING SHARE
         ------------------------------------------------------

                  The Trustee hereby:

         (a)      irrevocably waives its entitlement to the $0.01 quarterly
                  dividend required to be paid by Barrick on the Voting Share
                  pursuant to the provisions thereof, and acknowledges and
                  agrees that no such dividend will in fact be paid; and

         (b)      covenants and agrees that, at such time as no Exchangeable
                  Shares (other than Exchangeable Shares owned by Barrick or any
                  subsidiary or affiliate of Barrick) shall be outstanding and
                  there are no shares, securities, debt, options or other
                  agreements which could give rise to the issuance of any
                  Exchangeable Shares to any person (other than Barrick or any
                  subsidiary or affiliate of Barrick), the Trustee will transfer
                  and convey to Barrick the Voting Share and all of the
                  Trustee's rights, entitlements and interests therein, and the
                  Trustee irrevocably waives any entitlement to the payment of
                  the redemption price of $1.00, or the payment of any other
                  consideration, therefor.

2.4      ASSIGNMENT OF CERTAIN RIGHTS
         ----------------------------

                  For greater certainty, Homestake and Barrick hereby
acknowledge that, immediately upon the Merger becoming effective under the
Delaware General Corporation Law, Homestake has assigned to Barrick all of
Homestake's rights, entitlements and obligations under the Retraction Call
Right, the Redemption Call Right and the Liquidation Call Right, and Barrick
acknowledges receipt thereof, and the Trustee (on behalf of the holders of the
Exchangeable Shares) has consented to such assignment.

2.5      FRACTIONAL SHARES
         -----------------

                  The parties hereto agree that, where a holder of Exchangeable
Shares becomes entitled to receive a fractional interest in a Barrick Common
Share (determined on an aggregate basis) pursuant to the Exchangeable Share
Provisions or the Original Trust Agreement (as supplemented, modified and
amended by this Agreement), the holder shall receive, in lieu of such fractional
interest in a Barrick Common Share, the cash amount equal to such fractional
interest multiplied by the Current Market Price.

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                                      -6-

2.6      NOTICE OF EXERCISE OF RETRACTION CALL RIGHT
         -------------------------------------------

                  Where HCI has received a Retraction Request (as defined in the
Exchangeable Share Provisions) and immediately notified Barrick and Homestake
ULC thereof in accordance with the requirements of Section 6.2(2) of the
Exchangeable Share Provisions, Barrick and Homestake ULC hereby agree to notify
HCI within two Business Days that: (a) Barrick will exercise the Retraction Call
Right and Homestake ULC will not exercise the Retraction Call Right; (b)
Homestake ULC will exercise the Retraction Call Right and Barrick will not
exercise the Retraction Call Right; or (c) neither Barrick nor Homestake ULC
will exercise the Retraction Call Right; and, in the event that Barrick or
Homestake ULC elects to exercise the Retraction Call Right, such notice shall
also specify the number of Barrick Common Shares to be delivered thereunder, the
amount of cash to be paid thereunder in lieu of any fractional Barrick Common
Shares, and the amount of cash to be paid thereunder in satisfaction of a
Dividend Amount. HCI hereby agrees to notify the holder who has delivered the
Retraction Request (as defined in the Exchangeable Share Provisions) of such
information as soon as possible following receipt of such notice.

                                   ARTICLE 3
                     AMENDMENTS TO ORIGINAL TRUST AGREEMENT
                     --------------------------------------

                  The Original Trust Agreement is amended, modified and
supplemented, immediately upon the Merger becoming effective under the Delaware
General Corporation Law, as follows:

3.1      DEFINITIONS
         -----------

                  Section 1.1 of the Original Trust Agreement is amended,
modified and supplemented:

         (a)      by deleting the definitions of "Canadian Dollar Equivalent"
                  and "HCI Board of Directors";

         (b)      by deleting the definition of "Current Market Price" and
                  replacing it with the following:

                  "CURRENT MARKET PRICE" means, in respect of a Barrick Common
                  Share, on any date, the average closing sales price of Barrick
                  Common Shares during a period of five consecutive trading days
                  ending not more than five trading days before such date on The
                  Toronto Stock Exchange or, if the Barrick Common Shares are
                  not then listed on The Toronto Stock Exchange, on such other
                  stock exchange or automated quotation system on which the
                  Barrick Common Shares are listed or quoted, as the case may
                  be, as may be selected by the Board of Directors for such
                  purposes; provided, however, that if in the opinion of the
                  Board of Directors the public distribution or trading activity
                  of Barrick Common Shares during such period is inadequate to
                  create a market that reflects the fair market value of the
                  Barrick Common Shares, then the Current Market Price of a
                  Barrick Common Share shall be determined by the Board of
                  Directors based upon the advice of

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                                      -7-

                  such qualified independent financial advisors as the Board of
                  Directors may deem to be appropriate, and provided further
                  that any such selection, opinion or determination by the Board
                  of Directors shall be conclusive and binding.;

         (c)      by deleting the definition of "Dividend Amount" and replacing
                  it with the following:

                  "DIVIDEND AMOUNT" means, as at any date, an amount equal to
                  the full amount of all dividends and distributions then
                  declared and unpaid on each Exchangeable Share plus 53% of the
                  amount of all dividends and distributions declared on each
                  Barrick Common Share in respect of which no dividend or
                  distribution has then been declared on each Exchangeable Share
                  in accordance with the Exchangeable Share Provisions.

         (d)      by deleting the definition of "Homestake Common Stock" and
                  replacing it with the following:

                  "BARRICK COMMON SHARES" means the common shares in the capital
                  of Barrick and any other securities into which such shares may
                  be changed or for which such shares may be exchanged (whether
                  or not Barrick shall be the issuer of such other securities)
                  and any other consideration which may be received by the
                  holders of such shares, pursuant to a recapitalization,
                  reconstruction, reorganization or reclassification of, or
                  amalgamation, merger, liquidation or similar transaction,
                  affecting such shares.;

         (e)      by deleting the definition of "Trustee" and replacing it with
                  the following:

                  "TRUSTEE" means Computershare Trust Company of Canada and,
                  subject to the provisions of Article 10 hereof, includes any
                  successor trustee or permitted assigns.;

         (f)      by deleting the definition of "Voting Share" and replacing it
                  with the following:

                  "VOTING SHARE" means the first preferred share, series C
                  special voting share of Barrick, issued by Barrick to and
                  deposited with the Trustee, which entitles the holder to
                  exercise the Voting Rights.; and

         (g)      by deleting the words "each of San Francisco, California,
                  Toronto, Ontario and Vancouver, British Columbia" in the
                  definition of "Business Day" and replacing them with "Toronto,
                  Ontario".

3.2      CONFORMING CHANGES
         ------------------

                  The Original Trust Agreement is amended, modified and
supplemented:

         (a)      by deleting the words and phrases set forth below wherever
                  they appear in the Original Trust Agreement (other than in the
                  recitals thereto and in the definition of "Holdco") and
                  replacing them with the words and phrases set forth opposite:

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                                      -8-

<Table>
<Caption>
                  DELETION                              REPLACEMENT
                  --------                              -----------
<S>                                                     <C>
                  Homestake                             Barrick

                  Homestake Board of Directors          Barrick Board of Directors

                  Homestake Consent                     Barrick Resolution

                  Homestake Meeting                     Barrick Meeting

                  Homestake Successor                   Barrick Successor

                  shares of Homestake Common Stock      Barrick Common Shares

                  Homestake Common Stock                Barrick Common Shares
</Table>

         (b)      by deleting the phrase "including without limitation, the
                  delivery of Homestake Common Stock to the holders of
                  Exchangeable Shares in accordance with the Plan of Arrangement
                  including the Exchangeable Share Provisions" from Section
                  5.10;

         (c)      by deleting the phrases "or, prior to the Effective Date, of
                  Prime" and "the Plan of Arrangement," in each instance where
                  found in Section 6.6;

         (d)      by deleting the phrases "under the Plan of Arrangement," and
                  "of the Plan of Arrangement," in each instance where found in
                  Section 7.3;

         (e)      by deleting Section 6.11 and replacing it with the following:

                  6.11 DUE PERFORMANCE. On or after the effective date of the
                  Merger, Barrick shall duly and timely perform all of the
                  obligations that may arise upon the exercise of rights by any
                  holder of Exchangeable Shares. Barrick shall be responsible
                  for the due performance of all of Holdco's obligations
                  hereunder and under the Exchangeable Share Provisions, except
                  that in respect of the rights of Holdco under the Liquidation
                  Call Right, the Redemption Call Right and the Retraction Call
                  Right, Barrick's obligation shall be limited to acting to
                  ensure that Holdco will exercise its rights under the
                  Liquidation Call Right, the Redemption Call Right and the
                  Retraction Call Right only in circumstances where Holdco is
                  able to duly and timely perform in accordance with applicable
                  law its obligations with respect to the Liquidation Call
                  Right, the Redemption Call Right and the Retraction Call
                  Right.;

         (f)      by inserting the words "53% of" immediately before the phrase
                  "an equivalent dividend" in each instance where such phrase is
                  found in Section 6.1;

         (g)      by deleting the words "as is equal to the sum of" in Section
                  6.3 and replacing them with "as is equal to 53% of the sum
                  of";

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                                      -9-

         (h)      by deleting the words "the economic equivalent" in each
                  instance where found in Section 6.7(1) and replacing them with
                  "53% of the economic equivalent";

         (i)      by adding the phrase "(taking into account the exchange ratio
                  at which the Exchangeable Shares are exchangeable for Barrick
                  Common Shares)" immediately following the words "on an
                  economically equivalent basis" where found in Section 6.8;

         (j)      by deleting Section 14.5 and replacing it with the following:

                  14.5 RISK OF PAYMENTS BY POST. Whenever payments are to be
                  made or documents are to be sent to any Non-Affiliated Holder
                  by the Trustee, HCI or Barrick or by such Non-Affiliated
                  Holder to the Trustee, Barrick or HCI, the making of such
                  payment or sending of such document sent through the post or
                  by courier shall be at the risk of HCI, in the case of
                  payments made or documents sent by the Trustee, HCI or
                  Barrick, and at the risk of the Non-Affiliated Holder, in the
                  case of payments made or documents sent by the Non-Affiliated
                  Holder.

         (k)      by deleting Section 14.8.

3.3      VOTING SHARE AND VOTING RIGHTS
         ------------------------------

                  The Original Trust Agreement is amended, modified and
supplemented:

         (a)      by deleting the first two sentences of Section 3.1;

         (b)      by deleting the word "one vote" in Section 4.2 and replacing
                  it with "0.53 votes"; and

         (c)      by deleting Section 5.4 and replacing it with the following:

                  5.4 PURCHASE PRICE. The purchase price payable by Barrick for
                  each Exchangeable Share to be purchased by Barrick under the
                  Exchange Right shall be an amount per share equal to (a) 53%
                  of the Current Market Price of a Barrick Common Share on the
                  last Business Day prior to the day of closing of the purchase
                  and sale of such Exchangeable Share under the Exchange Right,
                  which shall be satisfied in full by causing to be delivered to
                  such holder 0.53 Barrick Common Shares, plus (b) the Dividend
                  Amount, if any, as of the last Business Day prior to the day
                  of closing of the purchase and sale of such Exchangeable Share
                  under the Exchange Right.

3.4      ARTICLE 14 - NOTICE
         -------------------

                  The Original Trust Agreement is amended, modified and
supplemented by deleting paragraphs (a), (b) and (c) of Section 14.3 and
replacing them with the following:

<Page>
                                      -10-

         (a)      in the case of a Notice to Barrick at:

                  Barrick Gold Corporation
                  Royal Bank Plaza
                  South Tower, Suite 2700
                  Toronto, Ontario
                  M5J 2I3

                  Attention:        General Counsel
                  Fax:              (416) 861-0727

         (b)      in the case of a Notice to Homestake or HCI at:

                  Homestake Mining Company
                  1600 Riviera Avenue
                  Suite 200
                  Walnut Creek, CA 94596

                  Attention:        General Counsel
                  Fax:              (925) 746-0548

         (c)      in the case of a Notice to the Trustee at:

                  Computershare Trust Company of Canada
                  510 Burrard Street
                  Vancouver, British Columbia
                  V6C 3B9

                  Attention:        Corporate Trust
                  Fax:              (604) 685-4079

                                   ARTICLE 4
                              ASSIGNMENT OF TRUSTS
                              --------------------

4.1      SALE OF ASSETS OF MONTREAL TRUST
         --------------------------------

                  Computershare and Montreal Trust hereby acknowledge and
represent that Computershare acquired the stock transfer and corporate trust
businesses of Montreal Trust pursuant to an Asset Purchase Agreement dated as of
June 30, 2000 (the "Trustee Change Effective Date") and, pursuant thereto,
Montreal Trust has agreed to transfer to Computershare the appointment as
trustee under the Original Trust Agreement, subject to the terms thereof and to
the agreement of the parties thereto. In order to give effect to the foregoing,
Montreal Trust desires to resign as trustee under the Original Trust Agreement
and to be discharged from the trusts thereof and to transfer to Computershare
all of its rights, powers and trusts under the Original Trust Agreement, and
Computershare desires to accept such appointment. Computershare hereby
represents that it meets all of the qualifications required of a new trustee
under the Original Trust Agreement.

<Page>
                                      -11-

4.2      RESIGNATION OF MONTREAL TRUST
         -----------------------------

                  Montreal Trust hereby resigns as trustee under, and is hereby
discharged from the trusts of, the Original Trust Agreement, effective as of the
Trustee Change Effective Date. Homestake and HCI hereby accept such resignation,
waiving any required period of notice that may be set forth in the Original
Trust Agreement.

4.3      APPOINTMENT OF COMPUTERSHARE
         ----------------------------

                  Homestake and HCI hereby appoint Computershare as successor
trustee under the Original Trust Agreement in the place and stead of Montreal
Trust and with like effect as if originally named as trustee under the Original
Trust Agreement, effective as of the Trustee Change Effective Date, and
Computershare hereby accepts such appointment. The parties hereby agree that
Montreal Trust shall not be responsible for any liabilities that may arise
pursuant to Computershare's administration of the trusteeship after the Trustee
Change Effective Date. For greater certainty, however, nothing in this Agreement
shall in any way release Montreal Trust from or affect its liabilities, duties
or obligations under the Original Trust Agreement arising prior to the Trustee
Change Effective Date.

4.4      TRANSFER AND ASSIGNMENT
         -----------------------

                  Montreal Trust hereby transfers and assigns to Computershare,
upon the trusts expressed in the Original Trust Agreement, all of its rights,
powers and trusts as trustee under the Original Trust Agreement, effective as of
the Trustee Change Effective Date. Computershare as successor trustee hereby
accepts the trusts in the Original Trust Agreement declared and provided and
agrees to perform the same upon the terms and conditions herein and in the
Original Trust Agreement set forth. Montreal Trust agrees to transfer and
deliver to Computershare as soon as practicable, and Computershare agrees to
accept, any and all records, documents, monies and other property that may be
held by Montreal Trust in connection with the Original Trust Agreement.

4.5      FURTHER ASSURANCES
         ------------------

                  Each party hereto agrees to execute and deliver all such
documents and instruments and do such other acts as may be necessary or
advisable to give effect to the assignment of trusts hereunder from Montreal
Trust to Computershare.

                                   ARTICLE 5
                                    GENERAL
                                    -------

5.1      ENUREMENT
         ---------

                  This Agreement shall be binding upon and enure to the benefit
of the parties hereto and their respective successors (including any successor
by reason of amalgamation of any party) and assigns and to the benefit of the
Non-Affiliated Holders.

<Page>
                                      -12-

5.2      ATTORNMENT
         ----------

                  Each of the parties hereto agrees that any action or
proceeding arising out of or relating to this Agreement or the Original Trust
Agreement (as amended, modified and supplemented hereby) may be instituted in
the courts of Ontario, waives any objection which it may have now or hereafter
to the venue of any such action or proceeding, irrevocably submits to the
jurisdiction of the said courts in any such action or proceeding, and agrees to
be bound by any final and unappealable judgment of the said courts.

5.3      EXECUTION AND DELIVERY
         ----------------------

                  This Agreement may be executed by the Parties in counterparts
and may be executed and delivered by facsimile and all such counterparts and
facsimiles shall together constitute one and the same agreement.

                  IN WITNESS OF WHICH the parties have duly executed this
Agreement.

                                       BARRICK GOLD CORPORATION

                                       By:
                                           ------------------------------
                                           Name:
                                           Title:

                                       HOMESTAKE MINING COMPANY

                                       By:
                                           ------------------------------
                                           Name:
                                           Title:

                                       HOMESTAKE CANADA INC.

                                       By:
                                           ------------------------------
                                           Name:
                                           Title:

<Page>
                                      -13-

                                       HOMESTAKE CANADA HOLDINGS
                                       COMPANY

                                       By:
                                           ------------------------------
                                           Name:
                                           Title:

                                       COMPUTERSHARE TRUST COMPANY
                                       OF CANADA

                                       By:
                                           ------------------------------
                                           Name:
                                           Title:

                                       MONTREAL TRUST COMPANY OF
                                       CANADA

                                       By:
                                           ------------------------------
                                           Name:
                                           Title:<PAGE>

                                                                   EXHIBIT 10.9

-------------------------------------------------------------------------------

                                 RENTAL CONTRACT
                              for commercial space
                                     between

SIEMENS INDUSTRIEPARK KARLSRUHE GMBH & CO. OHG
SIEMENSALLEE 84
76187 KARLSRUHE
                                                              ("LANDLORD")

                                                        and

BRUKER AXS ANALYTICAL X-RAY SYSTEMS GMBH
OSTLICHE RHEINBRUCKENSTR. 50
76187 KARLSRUHE
                                                              ("TENANT")

                                     PART 1

                               SPECIAL PROVISIONS

Section 1      RENTAL OBJECT

1. The landlord is the owner of the property known as Ostliche Rheinbruckenstr.
50, 76187 Karlsruhe.

2.  The landlord shall rent the following space to the tenant pursuant to
DIN 277:

a.       in the building 5408       316.4 m(2) NGF [net commercial space]
         in the building 5409       932.4 m(2) NGF
         in the building 5410       342.7 m(2) NGF
         (Appendix 1)

b.       10 automobile parking spaces on the land surrounding the buildings.

The tenant shall have no claim to assignment of specific parking spaces on the
land surrounding the buildings.

The area of the rental object shall be agreed to consist of the listed m(2). If
the actual size differs from the agreed size, the contracting parties may not
request an increase or decrease of the rental rate listed in Section 4 of the
Special [Agreement] part of this contract, if the deviations are insignificant
relative to the entire rented area.

CONFIDENTIAL TREATMENT HAS BEEN REQUESTED AS TO CERTAIN PORTIONS OF THIS
EXHIBIT, WHICH PORTIONS HAVE BEEN OMITTED AND REPLACED WITH [**] AND FILED
SEPARATELY WITH THE COMMISSION.

<PAGE>

3. The rental object includes the common areas shared by the tenant (hallways,
staircases, etc.) and secondary use areas (toilets, cloakrooms, etc.). The
landlord shall have the right to undertake structural modifications, regardless
of the concurrence of the tenant, to such included land and building areas,
which are not designated for the exclusive utilization by the tenant or which
are not required for use of or access to the rental object.

4. The rental object is identified on the attached map (Appendix 1a). The areas
of exclusive use by the tenant as defined in Paragraph 2 are shown in red, the
areas of common use as defined in Paragraph 3 are shown in green.

The spatial division of the rental object is shown in the floor plans included
as Appendix 1b.

5. Transfer documentation shall be prepared for the transfer of the rental
objects listed in Paragraph 2a to describe the condition of the rental object.
The transfer documentation shall be the binding description of the condition of
the rented areas at the time of transfer.

Section 2      RENTAL PURPOSE

1. The tenant shall be entitled to use the rental object for commercial
purposes.

The tenant shall bear exclusive responsibility for the fulfillment of conditions
or procurement of permissions regarding the type of use and/or the commercial
activities of the tenant.

The landlord warrants that the rental object may be used for commercial
purposes.

2.  The tenant may use the rental object only for production and storage.

Any change in use shall require the written prior consent of the landlord.

Section 3      DURATION OF THE RENTAL ARRANGEMENT, OPTION

1. The rental arrangement shall begin on Oct. 1, 1997, and terminate on Sep. 30,
1998, with no requirement for prior notice of cancellation.

2. The landlord stands ready to extend the rental arrangement according to
Paragraph 1 with the conditions of this rental contract until Sep. 30, 2001,
(option), if the tenant so indicates by notifying the landlord in writing no
later than June 30, 1998 (3 months prior to the end of the rental arrangement).
However, an extension of the rental arrangement shall be possible only if the
landlord is not limited in the economic use of the remaining areas of the rented
buildings by virtue of an extension of the contractual period for the present
rental areas.

<PAGE>

3.  The right to extraordinary termination shall not be affected.

If the rental arrangement is terminated through immediate cancellation by the
landlord, the tenant shall be obligated to reimburse the landlord for the
resulting damages incurred. In particular, the tenant shall be required to pay
as compensation for damages an amount corresponding to the rent exclusive of
utilities and heat and those ancillary costs that do not vary with use levels
until the end of the rental period agreed in Paragraph 1, unless the rental
object is otherwise rented.

In an instance of subletting at lower rent than agreed, the tenant shall be
obligated to pay the difference between the agreed and the actually obtained
rent exclusive of utilities and heat.

Section 4      RENTAL PAYMENT

1. The monthly rent for the rental object at the time of initiation of the
rental shall be set at

                  DEM 17,010.75.

The payment consists of:

<TABLE>
<S>                                                <C>                    <C>

a.  Rent exclusive of utilities and heat (rent)      DEM 7.00 per m(2)     DEM 11,140.50
b.  Prepayment of operating costs / flat-            DEM 3.50 per m(2)     DEM 5,570.25
         rate payment for operating costs
         (excluding user-specific costs for
         operation)
c.  10 parking spaces                                DM 30.00 each space   DM 300.00
</TABLE>

The specific components of the amount shown above are identified in Appendix 1.

The tenant has chosen rental subject to value added tax.
Consequently, in addition to the rent, operating costs, heating costs, and
prepayments, the tenant shall also be obligated to pay the currently applicable
value added tax. The amount for currently applicable value added tax, in
percentage terms and absolute amounts, shall be identified to the tenant on the
bank transfer documentation. The value added tax is currently 15%, thus the
current payable monthly amount is
                  DEM 19,562.36.
The areas included in the rental as defined in Section 1 Paragraph 3 are already
included in the rent excluding utilities and heat as shown in Paragraph 1a.

2. Prepayment of the operating costs and heat pursuant to Paragraph 1b covers
all costs as defined in Appendix 3 to Section 27 of the 2nd
BERECHNUNGSVERORDNUNG [Ordinance on Computation] (Appendix 2) to this contract,
as well as other ancillary costs.

Both parties understand that the list of costs identified in Appendix 3 to
Section 27 of the 2nd Ordinance on Computation has been prepared for residential
use and must therefore be

<PAGE>

understood in a broader sense to correspond to commercial usage (examples:
operating, cleaning and maintenance costs for fire prevention, air conditioning,
freight elevators, traffic control and barriers, video camera system, security
technology, security lighting, etc.).

If no measurement units have been installed or the type of operational cost is
not measurable, then billing of the resulting charges shall be prorated in
proportion of the area of the rental object to the area(s) of the entire
building(s) in the location.

The tenant understands that the buildings are not design for use by multiple
tenants and therefore accepts the above allocation scheme.

The landlord may combine properties and buildings into operating cost units. He
may modify the distribution scheme and the formation of operating cost units
pursuant to Section 315 of the German Civil Code.

The operating costs and the costs for heat shall be billed on a yearly basis
(billing year from Oct. 1 to Sep. 30). The billing shall occur within 12 months.

User-specific operating costs (e.g. energy, cleaning, etc.) shall be billed
separately and are not included in the prepayment of operating costs under
Paragraph 1b.

3. The amount payable shall always be due in advance by the third working day of
each month.

Bank:                      Deutsche Bank Karlsruhe
Bank routing number:       66070004
Account number:            [**]
Purpose:                   Monthly rent for Bruker AXS

If the tenant is in arrears with payment of the rent according to Paragraph 1,
then late interest at 4% above the then current discount rate of the Deutsche
Bundesbank shall be due and payable, unless the tenant can prove that the
damages incurred by the landlord are lower. The right to assert additional late
damages shall be reserved.

4. If additional ancillary costs arise as a required result of statutory
regulations during the course of the rental arrangement, these may be charged to
the tenant as permitted according to reasonable discretion under Section 315 of
the German Civil Code.

[**] INDICATES THAT INFORMATION HAS BEEN OMITTED AND FILED SEPARATELY WITH
     THE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT.

<PAGE>

Section 5      ADJUSTMENT OF THE RENT EXCLUDING UTILITIES AND HEAT AND
               ADJUSTMENT DURING OPTION PERIOD

1.  Changes in net rent excluding utilities and heat

If the tenant exercises the option during the period specified in Section 3
Paragraph 2, a new rental rate for the period of the option must be accepted at
least three months prior to the end of the rental arrangement according to
Section 3 Paragraph 1.

2.  Changes in prepayments

The landlord shall determine the amount of the prepayments according to his
reasonable discretion based upon the operating costs (Section 4 Paragraph 1b)
from the most recent billing statement and the expected changes in costs. Thus,
the landlord shall be entitled to raise the monthly prepayments. If the
notification of an increase is received by the 15th day of a month, then the
increased amount shall be due on the first day of the next month; otherwise, the
increased amount shall be due on the first day of the following month. If new
operating costs or other ancillary costs are imposed, then the tenant shall be
required to pay these costs on a proportional basis; the landlord shall be
entitled to increase the prepayment amount accordingly.

3.  Changes in Value Added Tax

The value added tax changes as provided by law, without specific notification by
the landlord.

Section 6      SERVICES

1. As in an actual contract for account of third parties, the tenant shall be
obligated to utilize the following obligatory services, which are in addition to
the ancillary costs listed in Appendix 2 (see Section 4 Paragraph 2):

o Plant security (excluding monitoring of personnel and goods transport)

o Fire protection

The costs of fire protection are included in the prepayment for operating costs.

2. The tenant may enter into other contracts between the provider of a service
and the tenant regarding the provision of other services at the location (not to
exceed the period of the rental contract).

Section 7      OTHER AGREEMENTS

1. The parties to the rental contract have agreed to a flat-rate amount for
operating costs as defined in Appendix 2 to this contract according to Section 4
Paragraph 1b for the duration of the rental arrangement from Oct. 1, 1997, to
Sep. 30, 1998. As a modification of Section 4 Paragraph 2, it is agreed that
there shall be no billing for operating costs for this time period and that the
costs shall be paid in full by the flat-rate payment for operating costs.

If the tenant exercises the option during the period specified in Section 3
Paragraph 1, the flat-rate payment for operating costs during the period of the
option shall be modified into a prepayment for operating costs. When the
landlord determines the level of prepayments

<PAGE>

for operating costs for the period after Oct. 1, 1998, he shall base that
determination on the actual costs that apply at the location at that time or
that are expected to apply. The billing and changes in prepayments during the
period of the option shall be subject to the provisions stipulated in this
contract.

2. The rental arrangement may be terminated by the tenant without notice during
the contractual period pursuant to Section 3 Paragraph 1, if the tenant
initiates a new rental of space of roughly equal size within the Siemens
Industriepark Karlsruhe.

Section 8      SEVERABILITY CLAUSE

Should one or more provisions of the general and/or special part of this
contract, including its Appendixes, be or become void, the validity of the
remainder of the contract shall not be affected. In such a case, the parties to
the contract agree to replace the void provision by a valid provision that
approximates to the extent possible the object and economic significance of the
void provision.

The same procedure must be used if a gap in coverage requiring amendment becomes
evident in the performance of this contract.

In the event of conflicts between the special and the general provisions of this
contract, the special provisions shall have priority.

                                     PART 2

                               GENERAL PROVISIONS

Section 1      SUPERFICIAL REPAIRS

1. The tenant agrees to treat the rental object and the common use areas with
diligence and customary care.

2. The tenant shall be obligated to undertake any required superficial repairs
(painting walls, doors, door frames, ceilings and radiators) in a professional
manner at regular intervals throughout the rental period. Wall-to-wall carpets,
doors and door frames, and ceiling elements (cover plates, sheet metal wall
elements, etc.) must be cleaned appropriately, depending on the degree of
soiling. The tenant shall be liable for damages due to inappropriate care,
treatment or use, unless the landlord caused the damage.

3. The tenant shall also be obligated to replace broken window glass panes at
his own expense. This does not include damage caused by lightning, fire or
explosion, which shall be covered by the building insurance carrier.

4. Section 16 Paragraph 2 applies for termination of the rental arrangement.

<PAGE>

Section 2      MINOR REPAIRS AND MAINTENANCE

The tenant must perform minor repairs so long as the ancillary costs do not
exceed DM 1,000.00 plus currently applicable VAT in each case, and if the net
repair amounts for each year do not exceed a net rental payment for one month.

Section 3      LIABILITY, TRAFFIC SAFETY

1. The tenant shall be liable for all damages and expenditures incurred by the
landlord due to the actions of the tenant or the actions of persons who come
into contact with the rental object at the behest of the tenant (staff, guests,
customers, workmen working on his behalf, delivery personnel, etc.). The tenant
shall also be liable for damages caused by negligence in the use of water,
electricity, fire, or electrical systems (for example, by overloading the
circuits), by deficient precautions to prevent break-ins, or through failure to
fulfill other duties of tenants.

2. The tenant must inform the landlord promptly regarding damage to or
deficiencies of the rental object (see also Appendix 3 - Building Rules and
Procedures). If the tenant neglects to so notify, he shall be responsible for
the resulting damages.

3. The tenant shall be obligated to ensure traffic safety in the areas of the
rental object under his exclusive control. The tenant shall be obligated to hold
the landlord harmless from claims by third parties in such areas. The landlord
shall be obligated to ensure traffic safety in areas of common use, such as
staircases, exits, parking areas, etc., and he shall allocate the costs to the
tenants sharing such common areas in proportion of the floor area of the rental
object to the total area of the building / location / parking lot.

4. The landlord shall be liable to the tenant only for those damages incurred by
the tenant that are due to willful misconduct or gross negligence on the part of
the landlord, an employee of the landlord, or an agent of the landlord (e.g.
caretaker, workman undertaking a repair) acting on behalf of the landlord.

5. If the supply of electricity, natural gas, water, or waste water flow is
interrupted for a reason not caused by the landlord or is modified to the
detriment of the tenant (supply problems), or if floods and other catastrophes
occur due to force majeure, the tenant shall have no right to derive a claim
against the landlord from such occurrences.

Section 4      WARRANTY

The tenant accepts the rental object in its current condition and location.

The warranty of the landlord shall be limited to deficiencies that were listed
in the transfer documentation at the time of transfer and to those that were not
visible by the tenant, even with ordinary care.

No assurances are made regarding specific qualities of the rental object.

<PAGE>

Section 5      INSURANCE

1. The landlord shall insure the rental object against damage from fire and
burning. The costs for this coverage shall be borne by the tenant in accordance
with Appendix 3 to Section 27 of the 2nd Ordinance on Computation (see Part 1
Section 4 Paragraph 2, Appendix 2, of this contract). Any increased insurance
premiums on the rental object or the building housing the rental object,
including possibly also adjacent buildings, that are due to the nature of the
business operated by the tenant, shall also be borne by the tenant. The tenant
shall be obligated to inform the landlord completely and on a timely basis
regarding the occurrence of any circumstances that could increase risks. If he
neglects to so inform, he shall be liable to the landlord for any resulting
damages. If the insurance carrier demands specific conditions, the tenant shall
be obligated to fulfill these conditions.

2. The tenant shall be obligated to obtain insurance against breaking and
entering, theft including vandalism, as well as business liability insurance,
including specifically insurance against risks deriving from use of
environmentally dangerous and water-polluting substances. The insurance coverage
of the business liability insurance must be DM 2 million for damages to persons
and property and DM 100,000.00 for damage to assets, if the business is purely
an office or an operation with no risks of any kind. All other operations of the
tenant must be insured for at least DM 7.5 million for damages to persons,
property, and assets. The tenant shall be obligated to keep the insurance
coverage in force throughout the rental arrangement and to provide proof of
coverage to the landlord upon demand.

Section 6      STRUCTURAL MODIFICATIONS BY THE TENANT

1. Structural modifications and changes to the technical infrastructure of the
building or buildings shall be permitted only with the prior written consent of
the landlord. The landlord may withhold his consent only for good cause.

2. The contracting parties must agree in writing prior to the execution of such
construction measures whether such modifications may remain in place at the end
of the rental arrangement or whether the tenant must reestablish the original
condition of the rental object.
If no written agreement is reached, then the original condition must be
reestablished at the end of the rental period if the landlord so demands.

3. Otherwise, the tenant shall be entitled to furnish the rental object with his
own equipment and apparatus at his own cost, in consultation with the landlord.
The tenant shall be obligated to produce this equipment and apparatus in
technically flawless condition, to remove the same after the end of the rental
arrangement, and to reestablish the original condition, unless the contracting
parties have agreed otherwise in writing.

For any measure carried out by the tenant, he shall be obligated to restore the
surrounding area to an orderly condition and, in particular, to close any
breached fire protection walls.

<PAGE>

4. The tenant may affix his name sign to the rental object and may mount
directional signs of normal size in the outer area of the location upon
consultation with the landlord (regarding location and size).

5. The tenant shall be obligated to adhere to the instructions of the landlord
regarding design, placement and finish of the company sign, signage in the outer
area, and signs inside the building.

6. The tenant shall bear sole responsibility for adherence to statutory
requirements and the procurement of zoning and other permits.

7. The tenant may produce additional keys at his own cost only with the
permission of the landlord or the designated key administrator (the number of
distributed keys is shown in the key register of the site administrator). These
additional keys must also be surrendered at the end of the rental period.

Section 7      IMPROVEMENTS AND STRUCTURAL MODIFICATIONS BY THE LANDLORD

1. The landlord may undertake improvements, repairs and structural changes
required to maintain the rental object, prevent impending danger, or repair
damage, even without the consent of the tenant. The tenant shall be required to
provide access to any rooms involved in such actions and may not impede or delay
the execution of such work.

2. Unless clear and present danger exists, the scheduling of such work shall be
discussed with the tenant on a timely basis prior to the execution of such work.

3. If the measures of Paragraph 1 temporarily impede use of the rental object,
the tenant may claim only those damages that the landlord accepts or that are
fixed by law as to cause and amount.

Section 8      ACCESS OF THE LANDLORD TO THE RENTAL OBJECT

The landlord or his agents may enter the rental object after timely advance
notification if there is suspicion of use contrary to the provisions of the
contract or negligence in the duty to exercise proper care, after a deficiency
of the rental object has been noted, to read meters, or for other significant
reason. If clear and present danger exists, then the landlord or his agents may
enter the rental object at any time.

If notice to terminate the rental arrangement has been given or if the property
is to be sold, the landlord or his agents may inspect the rental object with
prospective purchasers or tenants during normal business hours after sufficient
notice.

Section 9      BUILDING RULES AND PROCEDURES

1. The building rules and procedures for the property as described in Section 1
Section 1 (Appendix 3) must be observed and complied with.

<PAGE>

2. The tenant shall be entitled to use any pathways within the landlord's
business premises required for access to the rental object.

Section 10     ENVIRONMENTAL PROTECTION AND SAFETY

1. The tenant shall bear full responsibility for all equipment operated by him
with regard to environmental protection and safety. He shall be obligated to
assure that his operation does not generate any danger to the surroundings and
the environment, with full observance of all statutory and administrative
regulations. The tenant shall be obligated at all times, even after the end of
the rental arrangement, to provide information requested by the landlord as to
whether and where water-polluting substances as defined by the
WASSERHAUSHALTSGESETZ [Water Resources Management Act] are or have been used in
the rental object or on the property.

2. The tenant shall be liable during and even after the end of the rental
arrangement for all damages caused by use of environmentally hazardous
substances, specifically water-polluting or soil-polluting substances, during
the period of the rental arrangement.

3. The tenant shall also be liable if the contamination of soil, air,
groundwater and buildings is noted only after the end of the rental arrangement.

-------------------------------------------------------------------------------

4. The landlord shall be entitled to obtain expert testimony regarding any
contamination of soil, groundwater and buildings. The landlord shall be
obligated to inform the tenant in writing of the intention to obtain expert
testimony and to specify the expert sought. If the tenant does not accept the
expert, he shall be obligated to so notify the landlord in writing within 2
weeks after receipt of the notice. In this case, the contracting parties agree
to engage the services of a publicly available and sworn expert to be proposed
by the President of the Chamber of Industry and Commerce for the district where
the property is located. The party identified as the originator of the
contamination shall be responsible for the costs of providing the expert
testimony. If the originator cannot be identified, the contracting parties shall
share the costs in equal parts.

5. The tenant shall be obligated to dispose of waste from operations,
particularly special and hazardous waste, at his own expense. Waste may not be
stored in the rental object.

6. The tenant shall also be obligated to ensure that vehicles stored by him or
his employees do not generate avoidable environmental damages (e.g. by leaking
oil or gasoline) and that no waste is brought into the rental object.

Section 11     SUBLETTING

Subletting of the rental object shall be permitted only with the prior written
consent of the landlord. The landlord may withhold his consent only for good
cause.

<PAGE>

Section 12     PROTECTION FROM COMPETITION

There shall be no protection from competition.

Section 13     SALE OF THE RENTAL OBJECT

If the landlord sells the rental object or the property and the purchaser does
not fulfill his obligations, then, contrary to the provisions of Section 571
Section 2 BGB [German Civil Code], the landlord shall have no liability of
surety for any damages reimbursable by the purchaser.

Section 14     REDUCTION OF RENT, BILLING, RIGHT TO WITHHOLD

The tenant shall not be entitled to offset claims of the landlord arising under
this contract with counterclaims, to assert a right to withhold funds, or to
reduce the rent, unless the counterclaim or the right to withhold or reduce the
rent are mutually agreed as to cause and amount or are determined by force of
law. This provision does not invalidate the right of the tenant to assert
counterclaims and claims for rent reduction by way of a legal complaint.
Moreover, a reduction of the rent shall be possible only for a substantial
reduction in usability.

Section 15     USE OF STAFF FOR SERVICES

Employees of the landlord may carry out service activities in the office spaces
of the tenant in fulfillment of the provisions of the rental contract. The
landlord shall determine in each case which of his employees will be assigned
with the performance of such services. The tenant shall not be entitled to
instruct these employees regarding the content, timing, and location of such
services. The landlord shall instruct his employees to ignore such instructions.
Requests, suggestions, complaints etc. must be addressed to the administrator
designated by the landlord.

Section 16     RETURN OF THE RENTAL OBJECT

1. The tenant agrees to return the rental object and the common use areas to the
landlord in the same condition, except for normal wear and tear, as they existed
at the time of transfer at the beginning of the rental arrangement, as
documented in the transfer document (Appendix 4).

2. The tenant shall be obligated in any event to undertake superficial or minor
repairs prior to return of the rental object. The tenant shall be obligated to
use similar colors, materials etc. as were present in the rental object at the
beginning of the rental arrangement.

3. The provisions of Section 6 of this contract shall apply to any structural
modifications. If the tenant is obligated to remove equipment or carry out any
other measures, this work must be completed prior to the end of the rental
arrangement.

<PAGE>

4. Should any deficiencies remain after return of the rental object and should
the tenant be obligated to remedy them under the provisions of this contract,
then the landlord shall be entitled, without resorting to a grace period, to
initiate repair of these deficiencies, with the costs to be borne by the tenant.

Section 17     CONTINUATION OF USE

If the tenant continues his use of the rental object and the landlord does not
object within two weeks, then the rental arrangement shall not be deemed to be
extended indefinitely, contrary to the provisions of Section 568 of the German
Civil Code.

Section 18     EXTERNAL RELATIONS

The landlord shall act alone in all dealings with governmental authorities,
companies that supply utility or waste removal services, etc., in all matters
that concern the property, buildings, and location infrastructure, unless he has
transferred this function to the building administrator. This does not include
matters relating to the type of usage or the business of the tenant.

Section 19     WRITTEN FORM, OTHER MATTERS, VENUE

1. The contracting parties are familiar with the special statutory requirements
of Sections 566, 126 of the German Civil Code regarding written form. They
mutually pledge to undertake all actions and provide declaration required to
satisfy the legal requirements regarding written form, if either party so
requests at any time, and to abstain from terminating this contract prematurely
by reference to failure to adhere to the legal written form. This applies not
only to the main contract itself, but also to amendments, modifications, and
augmentation contracts. Ancillary agreements, modifications, and augmentations
of this contract must be in writing. Oral agreements have no validity. The
contracting parties agree that no ancillary agreements exist.

2. The site plan and other attachments are an integral component of this
contract.

The following Appendixes are a material component of this contract:

Appendix 1        Site Plan and Listing of Rental Objects / Sizes with
                  Specification of Contractual Period, Computation of Rent,
                  and Prepayment of Ancillary Costs

Appendix 1a       Site plan

Appendix 1b       Floor Plans

Appendix 2        Appendix 3 to Section 27 of the 2nd Ordinance on Computations

Appendix 3        Building Rules and Procedures

Appendix 4        Transfer Documentation

<PAGE>

3. The venue for all obligations and disputes arising from this contract is
Karlsruhe.

Karlsruhe, Dec. 2, 1997             Karlsruhe, Dec. 2, 1997
Siemens Industriepark Karlsruhe     BRUKER AXS Analytical X-ray Systems GmbH
GmbH & Co. OHG                      Systems for x-ray analysis

/s/ Illegible                       /s/ Martin Haase
-------------------------------     --------------------------------
Landlord                            Tenant

<PAGE>

APPENDIX 1    to rental contract between Siemens Industriepark Karlsruhe GmbH &
              Co. OHG and Bruker AXS Analytical X-ray Systems GmbH / Frasen,
              Ostliche Rheinbruckenstr. 50, 76187 Karlsruhe

<TABLE>
<CAPTION>

----------------------------------------------------------------------
  Basic data                               Determination by Tenant
----------------------------------------------------------------------
<S>        <C>      <C>       <C>       <C>      <C>       <C>

Building    Size     Expansion  Rental   Duration  Rental   Duration
Level       in m(2)  factor     space    of        space    of rental
Axis ID 1            for        in m(2)  rental    in m(2)  contract
ID 2                 building            contract           from Oct.
                     (accounts           from               1, 1997 to
                     for                 Oct. 1,            Sep. 30,
                     common              97 to              2000
                     space)

----------------------------------------------------------------------
  540802    278      1,138      316.4    9/30/98   316.4
----------------------------------------------------------------------
  540902    819      1,138      932.4              932.4
----------------------------------------------------------------------
  541002    301      1,138      342.7              342.7
----------------------------------------------------------------------
                                                   10
----------------------------------------------------------------------
Parking    1396               1,501.5            1,401.6
spaces
----------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>

-------------------------------------------------------------------------------------------------------------------------
     Rental Rates / Excluding Utilities and Heat                                       Prepayments       Total
-------------------------------------------------------------------------------------------------------------------------
 <S>             <C>               <C>              <C>              <C>               <C>               <C>

   Rent at SIK    Rent at SIK excluding utilities and heat,                             Ancillary costs    with
   excluding      contract of 3 years or more                                           and pro-rated      prepayments,
   utilities                                                                            shares             ancillary
   and heat,      1st year (97/98) 2nd year (98/99) 3rd year (99/00) Year 97/98         Prepayment         costs and
   contract of    in DEM /m(2)     in DEM /m(2)     in DEM /m(2)     total rent         (billing           required shares
   less than 2    per month        per month        per month        excluding          according to
   years, in                                                         utilities and      use)
   DEM /m(2)                                                         heat, DEM
   per month                                                         per month          Fiscal year 97/98

                                                                                        Shop/Prepayments
                                                                                        storage per month,
                                                                                        buildings  DEM
-------------------------------------------------------------------------------------------------------------------------
   7.00           7.00                                                2,214.80            3.50   1,107.40   3,322.20
-------------------------------------------------------------------------------------------------------------------------
   7.00           7.00                                                6,526.80            3.50   3,263.40   9,790.20
-------------------------------------------------------------------------------------------------------------------------
   7.00           7.00                                                2,398.90            3.50   1,199.45   3,598.35
-------------------------------------------------------------------------------------------------------------------------
   30.00          30.00                                               300.00              0.00   0.00       300.00
-------------------------------------------------------------------------------------------------------------------------
                                                                     11,140.50                   5,570.25   17,010.75

-------------------------------------------------------------------------------------------------------------------------

                                                                                       ----------------------------------
                                                                                       Value added tax, 15%   2,251.61
                                                                                       ----------------------------------
                                                                                       Total, incl. VAT       19,562.36
                                                                                       ----------------------------------
                                                                                       Monthly debit by AUT 1 EWK RW
                                                                                       ----------------------------------
</TABLE>

<PAGE>

APPENDIX 1A to Rental Contract

<TABLE>
<S>                                                       <C>                                 <C>

Business premises 1: Building 54                              Floor-space areas HNF/NGF

                                                              Business premises 1
                                                              Building 01-05                   24234/31094
                                                              Building 06-10                   13989/15916
                                                              Building 11-13                   9571/14279
           [diagram of site plan]                             Building 14                      8595/9895
                                                              Building 15                      5884/7676
                                                              Building 16-21                   19452/21519
                                                              Building 22                      5835/7499
                                                              Building 28                      5027/6310
                                                              Building 29                      3377/4955
                                                              Building 30                      567/872
                                                              Building 31                      2914/3100
                                                              Building 32                      954/1241
                                                              Building 33                      2786/3197
                                                              Building 34                      1112/1144
                                                              Building 35                      816/917
                                                              Building 36                      614/614
                                                              Building 38                      1436/1436
                                                              Building 40/41                   929/933
                                                              Building 45                      9196/10635
                                                              Building 46                      2370/3166

Business premises 2: Building 73                              Floor-space areas HNF/NGF

                                                              Business premises 2
                                                              Building 01                      2857/3525
                                                              Building 02                      4990/6147
                                                              Building 03-04                   17569/24062
           [diagram of site plan]                             Building 06-07                   9093/12609
                                                              Building 26                      7440/9165
                                                              Building 28                      7072/7864
                                                              Building 29                      5361/6260
                                                              Building 30                      1970/3447
                                                              Building 36                      1294/1294
                                                              Building 39                      4911/5680

                                                              Total                            182492/226801
</TABLE>

[Diagram of Floor Plan]
Proposal Paragraph 1
Used space

<PAGE>

APPENDIX 2 to Rental Contract

                             LIST OF OPERATING COSTS
                according to Appendix 3 (to Section 27 Section 1)
                      of the 2nd Ordinance on Computations
                         as promulgated on Oct. 12, 1990

Operating costs are the following costs that accrue continually to the owner
(leaseholder) through ownership (leasehold) of the property or through the
orderly use of the building or the economic unit, the associated buildings,
facilities, equipment, and property, unless they are normally paid by the tenant
directly in addition to rent:

1.       PUBLIC CHARGES FOR THE PROPERTY

         This specifically includes real estate taxes, although not a levy on
         mortgage profits.

2.       COSTS OF WATER SUPPLY

         This includes costs of water consumption, connecting charges, costs of
         rental or other usage fees for water meters and the costs of their use,
         including costs for computation and allocation, operating costs of an
         internal water distribution system for the building, and a water
         processing plant, including processing materials.

3.       COSTS FOR WATER REMOVAL

         This includes costs for water removal from building and property, costs
         of operating an appropriate non-public treatment plant, and costs of
         operating a drainage sump pump.

4.       COSTS

         a.       of operating a central heating plant, including the exhaust
                  unit; this includes costs for the fuels consumed and their
                  delivery, costs of operating electricity, operating costs,
                  supervision, and maintenance of the plant, the regular
                  inspection of its operational readiness and safety, including
                  hiring of an expert to clean the unit and the operating area,
                  costs of measurements required by the
                  BUNDES-IMMISSIONSSCHUTZGESETZ [Federal Act on Protection from
                  Emissions], costs for rental or other usage fees for a system
                  for monitoring use, and costs of using a system for monitoring
                  use, including costs for computation and allocation;

         or

         b.       of operating a central fuel supply unit;
                  this includes the costs of fuels consumed and their delivery,
                  costs of the operating electricity and costs for supervision,
                  as well as costs for cleaning the unit and the operating
                  area;

         or

         c.       of the independent commercial delivery of heat, including heat
                  from units as defined in Letter a; this includes charges for
                  the delivery of heat and the costs of operating the associated
                  building systems according to Letter a;

         or

         d.       of cleaning and maintaining single-story heating systems;
                  this includes the costs of removing water deposits and
                  combustion residues in the system, costs of regular
                  inspection of its operational readiness and safety,
                  including associated adjustments by an expert, and costs of
                  measurements required by the Federal Act on Protection from
                  Emissions.

<PAGE>

5.       COSTS

         a.       of operating a central hot water supply system; this includes
                  costs of water supply according to Paragraph 2, unless already
                  covered there, and costs of heating the water according to
                  Paragraph 4 Letter a;

         or

         b.       of the independent commercial delivery of hot water, including
                  from units as defined in Letter a; this includes charges for
                  the delivery of hot water and the costs of operating the
                  associated building systems according to Paragraph 4 Letter a;

         or

         c.       of cleaning and maintaining water heaters;
                  this includes the costs of removing water deposits and
                  combustion residues in the heaters, and costs of regular
                  inspection of their operational readiness and safety,
                  including associated adjustments by an expert.

6.       COSTS OF COMBINED HEAT AND HOT WATER SUPPLY SYSTEMS

         a.       for central heating systems according to Paragraph 2, unless
                  already included there;

         or

         b.       of the independent commercial delivery of heat according to
                  Paragraph 4 Letter c and according to Paragraph 2, unless
                  already included there;

         or

         c.       for combined single-story heating systems and hot water supply
                  systems according to Paragraph 4 Letter d and according to
                  Paragraph 2, unless already included there.

7.       COSTS OF OPERATING A MECHANICAL ELEVATOR FOR PERSONS OR FREIGHT

         This includes the costs of operating electricity, costs of management,
         operation, inspection and maintenance of the unit, regular inspection
         of the operational readiness and safety, including adjustments by an
         expert and costs for cleaning the unit.

8.       COSTS FOR STREET CLEANING AND TRASH REMOVAL

         This includes the fees charged for public street cleaning and trash
         removal or the costs of equivalent non-public services.

9.       COSTS OF BUILDING CLEANING AND PEST CONTROL

         The costs for building cleaning include costs for the cleaning of
         building components used jointly by the residents, such as entrances,
         hallways, stairs, basements, attics, laundry facilities, and the
         elevator cabin.

10.      COSTS FOR GARDENING

         This includes the costs for maintenance of garden areas, including the
         replacement of plants and trees, the care of playgrounds, including the
         replacement of sand and the care of areas, entrances and driveways not
         designated for public transit.

11.      COSTS OF LIGHTING

         This includes costs for lighting the property and the jointly used
         building areas, such as entrances, hallways, stairs, basements, attics,
         and laundry facilities.

12.      COSTS OF CHIMNEY SWEEPING

         This includes the sweeping fees according to the relevant fee schedule,
         unless already included as a cost in Paragraph 4 Letter a.

<PAGE>

13.      COSTS OF INSURANCE AND LIABILITY INSURANCE

         This includes specifically the costs for insuring the building against
         fire, storm, and water damage, window glass insurance, liability
         insurance for the building, the oil storage tank, and the elevator.

14.      COSTS FOR THE BUILDING ENGINEER

         This includes the remuneration, benefits, and all financial payments
         made by the owner (leaseholder) to the building engineer for his labor,
         to the extent that this labor does not represent maintenance, repair,
         renovation, superficial repairs or building administration.

         If work is done by the building engineer, the costs for such work may
         not be included in Paragraphs 2 to 10.

15.      COSTS

         a.       of operating a community antenna system; this includes the
                  costs of operating electricity and the costs of regular
                  inspection of system operation, including adjustment by an
                  expert, or the fees for using an antenna unit not belonging to
                  the economic unit;

         or

         b.       of operating a distribution system connected to a broadband
                  cable network; this includes the costs under Letter 1 [sic],
                  also the accruing monthly basic fees for broadband
                  connections.

16.      COSTS OF OPERATING THE WASHING MACHINERY

         This includes the costs of operating electricity, costs of supervision,
         care and cleaning of the machinery, regular inspection of its
         operational readiness and safety, as well as costs of water supply
         according to Paragraph 2, unless already included there.

17.      OTHER OPERATING COSTS

         These are operating costs not listed in Paragraphs 1 to 6, specifically
         the operating costs of auxiliary buildings, facilities, and equipment.

APPENDIX 3 to the Rental Contract:

BUILDING RULES AND PROCEDURES
Siemens AG, location Karlsruhe

o        Notifications from local management shall apply.

o        In the interest of all tenants, you are obligated to maintain order and
         cleanliness on the property and in the building.

o        The STRASSENVERKEHRSORDNUNG [General Traffic Ordinances] apply on all
         streets and paths on the property.

o        In the interest of general safety, instructions of the plant safety
         staff must be followed.

o        The photographing and filming of buildings and equipment not included
         in the rental object shall require the permission of AUT EWK BB.

o        The separation of trash for recycling, as required by the City of
         Karlsruhe, is mandatory under the regulations of the City of Karlsruhe.

<PAGE>

o        The identified emergency escape routes and safety equipment must be
         operational at all times. Escape routes may not be blocked or impeded.

o        Forklifts may not operate on double floors, and load limits must be
         observed.

o        At the end of the day, windows must be closed and outside window shades
         must be retracted.

o        The operating hours must be specified to ensure economically optimal
         operation of our ventilation and air conditioning system. We recommend
         that lights be turned off at the end of the work day and that
         electricity-consuming units that are no longer required be unplugged.

o        Elevators may not be used inappropriately and must not be overloaded
         (see load limit sign in elevator cabin). The emergency phone is to be
         used only in an emergency. Optical sensors may not be disabled
         (modified, taped over). The elevator must not be used during a fire
         alarm.

o        The fire protection regulations must be observed (BRANDSCHUTZ LEITFADEN
         DER SIEMENS AG) [Fire Protection Guidelines of Siemens AG]

o        Damage or defects must be reported without delay to AUT 1 EWK BB:

                  Tel.:   0721           595         1175
                          Karlsruhe      Siemens     internal

-------------------------------------------------------------------------------

APPENDIX 4        Transfer Documentation for the Rental Object

         to be supplied later.

<PAGE>

-------------------------------------------------------------------------------
1. ADDENDUM TO THE RENTAL CONTRACT OF AUG. 12, 1997
                                               for commercial space
                                                      between

SIEMENS INDUSTRIEPARK KARLSRUHE GMBH & CO. OHG

                                                            ("LANDLORD")

                                                        and

BRUKER AXS ANALYTICAL X-RAY SYSTEMS GMBH
OSTLICHE RHEINBRUCKENSTR. 50
76187 KARLSRUHE
                                                             ("TENANT")

Section 1      RENTAL OBJECT

1. The landlord is the owner of the property known as Ostliche Rheinbruckenstr.
50, 76187 Karlsruhe.

2. The landlord rents space in the property known as Ostliche Rheinbruckenstr.
50, buildings 5428 and 5430 (see Appendix 1a) to the tenant.

Section 2      OPERATING COSTS

1. The flat-fee charge for operating costs shall be modified into an advance
payment for operating costs.

The operating costs and the heating costs shall be billed on a yearly basis
(billing year from Oct. 1 to Sep. 30). The billing must be completed within 12
months.

2. Starting on April 1, 1998, the tenant shall receive the following additional
services to be covered by the operating costs (Appendix 2 to the Rental
Contract):

o        Security surveillance of the land and buildings after normal working
         hours.

o        Response to alarms at all times (notification, fire alarms, and central
         office notification)

o        Reception for visitors and Information

-------------------------------------------------------------------------------

Section 3      CHANGE IN RENTAL PAYMENTS

The flat-fee charge for operating costs of DEM 3.50 / m(2) shall be modified
into an advance payment for operating costs of DEM 3.43 / m(2), effective Oct.
1, 1998.

That change results in the following payment due starting on Oct. 1, 1998:

<PAGE>

Total net amount due                        DEM 92,773.05
Value added tax, currently 16%              DEM 14,843.69
----------------------------------------------------------
Amount payable, including VAT               DEM 107,616.74

Section 4      FINAL PROVISIONS

1.       Except for the changes listed above, the stipulations of the main
         rental agreement shall remain in effect.

2.       Appendix 1a (Listing of Rental Objects, Calculation of Rent and
         Prepayment of Ancillary Costs) contains the rental agreements for
         buildings 5428 / 5430 and buildings 5407-5410.

3.       The venue for all obligations and disputes arising from this contract
         shall be Karlsruhe.

Karlsruhe, March 23, 1999           Karlsruhe, March 26, 1999
Siemens Industriepark Karlsruhe     Bruker AXS Analytical X-ray Systems GmbH
GmbH & Co. OHG
Siemensallee 64
76187 Karlsruhe

/s/ Illegible                       /s/ Martin Haase
--------------------------------    -----------------------------------
Landlord                            Tenant

<PAGE>

APPENDIX 1A          to rental contract between Siemens Industriepark Karlsruhe
                     GmbH & Co. OHG and Bruker AXS Analytical X-ray Systems
                     GmbH
                     Ostliche Rheinbruckenstr. 50, 76187 Karlsruhe

<TABLE>
<CAPTION>

--------------------------------------------------------------------------------------------------------
                                 Basic data                                    Determination by Tenant

--------------------------------------------------------------------------------------------------------
Building     Level   Axis  ID 1   ID 2  Size in    Expansion       Rental     Duration of       Rental
                                        m(2)       factor for      space in   rental contract   space
                                                   building        m(2)                         in m(2)
                                                   (accounts for
                                                   common space)              From       To
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
<S>          <C>     <C>   <C>    <C>   <C>        <C>             <C>        <C>     <C>       <C>

5428         01      21                 10         1.245           12.5       10/1/97 9/30/02   12.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         01      21    1            12         1.245           14.9       10/1/97 9/30/02   14.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      0            D     92         1.245           114.6      10/1/97 9/30/02   114.6
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      1                  171        1.245           212.9      10/1/97 9/30/02   212.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      3                  78         1.245           97.1       10/1/97 9/30/02   97.1
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      4                  333        1.245           414.7      10/1/97 9/30/02   414.7
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      4     1            43         1.245           53.6       10/1/97 9/30/02   53.6
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      10                 30         1.245           37.4       10/1/97 9/30/02   37.4
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      10    1            42         1.245           52.3       10/1/97 9/30/02   52.3
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      10    2            52         1.245           64.8       10/1/97 9/30/02   64.8
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      10    3            50         1.245           62.3       10/1/97 9/30/02   62.3
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      11    3            24         1.245           29.9       10/1/97 9/30/02   29.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      12                 63         1.245           78.5       10/1/97 9/30/02   78.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      13                 55         1.245           68.5       10/1/97 9/30/02   68.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      14                 34         1.245           42.3       10/1/97 9/30/02   42.3
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      20                 50         1.245           62.3       10/1/97 9/30/02   62.3
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      20    1            5          1.245           6.2        10/1/97 9/30/02   6.2
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      30                 36         1.245           44.8       10/1/97 9/30/02   44.8
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      30    1            23         1.245           28.6       10/1/97 9/30/02   28.6
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      40                 88         1.245           109.6      10/1/97 9/30/02   109.6
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      40    1            47         1.245           58.5       10/1/97 9/30/02   58.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      44                 440        1.245           547.9      10/1/97 9/30/02   547.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      44    1            37         1.245           46.1       10/1/97 9/30/02   46.1
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      44    2            60         1.245           74.7       10/1/97 9/30/02   74.7
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         02      54                 19         1.245           23.7       10/1/97 9/30/02   23.7
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      1                  195        1.245           242.8      10/1/97 9/30/02   242.8
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      1     1            99         1.245           123.3      10/1/97 9/30/02   123.3
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      10                 96         1.245           119.5      10/1/97 9/30/02   119.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      11                 255        1.245           317.5      10/1/97 9/30/02   317.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      11    4            8          1.245           10.0       10/1/97 9/30/02   10.0
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      14                 1,206      1.245           1501.8     10/1/97 9/30/02   1501.8
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      14    1            24         1.245           29.9       10/1/97 9/30/02   29.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      14    2            25         1.245           31.1       10/1/97 9/30/02   31.1
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      14    3            28         1.245           34.9       10/1/97 9/30/02   34.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      20                 122        1.245           151.9      10/1/97 9/30/02   151.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      30                 47         1.245           58.5       10/1/97 9/30/02   58.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      40                 74         1.245           92.1       10/1/97 9/30/02   92.1
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      40    1            24         1.245           29.9       10/1/97 9/30/02   29.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      40    2            25         1.245           31.1       10/1/97 9/30/02   31.1
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      40    3            24         1.245           29.9       10/1/97 9/30/02   29.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      40    4            20         1.245           24.9       10/1/97 9/30/02   24.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5428         03      41                 380        1.245           473.2      10/1/97 9/30/02   473.2
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5430         02      4                  872        1.000           872.0      10/1/97 9/30/02   872.0
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5407         02      15           B     19         1.230           23.4       10/1/97 9/30/02   23.4
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5406         02      38                 280        1.230           344.4      10/1/97 9/30/02   344.4
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5406         02      76           B     16         1.230           19.7       10/1/97 9/30/02   19.7
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5409         02      6            A     65         1.230           80.0       10/1/97 9/30/02   80.0
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5409         02      14                 50         1.230           61.5       10/1/97 9/30/02   61.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5409         02      21           A     664        1.230           816.7      10/1/97 9/30/02   816.7
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5409         02      21           C     69         1.230           84.9       10/1/97 9/30/02   84.9
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5409         02      21           D     54         1.230           66.4       10/1/97 9/30/02   66.4
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5409         02      21           G     11         1.230           13.5       10/1/97 9/30/02   13.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5410         02      31           S     190        1.230           233.7      10/1/97 9/30/02   233.7
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5410         02      31           D     73         1.230           89.8       10/1/97 9/30/02   89.8
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5410         02      3                  25         1.230           30.8       10/1/97 9/30/02   30.8
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5410         02      31           K     74         1.230           91.0       10/1/97 9/30/02   91.0
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5408         01      53           B     50         1.230           61.5       10/1/97 9/30/02   61.5
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
5409         02      21           I     73         1.230           89.8       10/1/97 9/30/02   89.8
------------ ------- ----- ------ ----- ---------- --------------- ---------- ------- --------- --------
Outside parking spaces, building 5428                              80                           80.0
------------------------------------------------------------------ ---------- ------- --------- --------
Outside parking spaces, building 5407-10                           10                           10.0
------------------------------------------------------------------ ---------- ------- --------- --------
Deduction for saved maintenance measures
------------------------------------------------------------------ ---------- ------- --------- --------

<CAPTION>

-----------------------------------------------------------------------------
              Rental Rates / Excluding        Prepayments          Total
                 Utilities and Heat
-----------------------------------------------------------------------------
Building     Rent at SIK    Total rent    Ancillary costs and   Rent per
             excluding      excluding     pro-rated shares      month, DEM
             utilities      utilities     (flat-rate)
             and heat, in   and heat,
             DM /m(2) per   DEM per       DEM /m(2)
             month          month         DEM per
                                          month      per month
------------ -------------- ------------- ---------- ---------- -------------
<S>          <C>            <C>           <C>        <C>        <C>

5428         13.30          165.62        3.43       42.71      208.33
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          198.75        3.43       51.26      250.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          1,523.71      3.43       392.96     1,916.67
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          2,832.12      3.43       730.39     3,562.51
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          1,291.84      3.43       333.16     1,625.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          5,515.18      3.43       1,422.33   6,937.51
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          712.17        3.43       183.66     895.83
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          496.86        3.43       128.14     625.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          695.61        3.43       179.39     875.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          861.223       3.43       222.11     1083.34
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          826.10        3.43       213.56     1041.67
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          397.49        3.43       102.51     500.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          1,043.41      3.43       269.09     1,312.50
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          910.92        3.43       234.92     1,145.84
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          563.11        3.43       145.22     708.33
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          828.10        3.43       213.56     1,041.67
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          82.81         3.43       21.36      104.17
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          596.24        3.43       153.77     750.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          380.93        3.43       96.24      479.17
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          1,457.46      3.43       375.87     1,833.34
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          778.42        3.43       200.75     979.17
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          7,287.32      3.43       1,879.36   9,166.68
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          612.80        3.43       158.04     770.83
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          993.73        3.43       256.28     1,250.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          314.68        3.43       81.15      395.83
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          3,229.61      3.43       832.90     4,062.51
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          1,639.65      3.43       422.86     2,062.50
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          1,589.96      3.43       410.04     2,000.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          4,223.33      3.43       1,089.18   5,312.51
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          132.50        3.43       34.17      166.67
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          19,973.88     3.43       5,151.16   25,125.04
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          397.49        3.43       102.51     500.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          414.05        3.43       106.78     520.83
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          463.74        3.43       119.60     583.33
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          2,020.58      3.43       521.10     2,541.67
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          778.42        3.43       200.75     979.17
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          1,225.59      3.43       316.07     1,541.67
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          397.49        3.43       102.51     500.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          414.05        3.43       106.78     520.83
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          397.49        3.43       102.51     500.00
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          331.24        3.43       85.43      416.67
------------ -------------- ------------- ---------- ---------- -------------
5428         13.30          6,293.59      3.43       1,623.08   7,916.68
------------ -------------- ------------- ---------- ---------- -------------
5430         8.80           7,673.60      3.43       2,990.96   10,664.56
------------ -------------- ------------- ---------- ---------- -------------
5407         7.00           163.59        3.43       80.16      243.75
------------ -------------- ------------- ---------- ---------- -------------
5406         7.00           2,410.80      3.43       1,181.29   3,592.09
------------ -------------- ------------- ---------- ---------- -------------
5406         7.00           137.76        3.43       67.50      205.26
------------ -------------- ------------- ---------- ---------- -------------
5409         7.00           559.65        3.43       274.23     833.88
------------ -------------- ------------- ---------- ---------- -------------
5409         7.00           430.50        3.43       210.95     641.45
------------ -------------- ------------- ---------- ---------- -------------
5409         7.00           5,717.04      3.43       2,801.35   8,518.39
------------ -------------- ------------- ---------- ---------- -------------
5409         7.00           594.09        3.43       291.10     885.19
------------ -------------- ------------- ---------- ---------- -------------
5409         7.00           464.94        3.43       227.82     692.76
------------ -------------- ------------- ---------- ---------- -------------
5409         7.00           94.71         3.43       46.41      141.12
------------ -------------- ------------- ---------- ---------- -------------
5410         7.00           1,635.90      3.43       801.59     2,437.49
------------ -------------- ------------- ---------- ---------- -------------
5410         7.00           628.53        3.43       307.98     936.51
------------ -------------- ------------- ---------- ---------- -------------
5410         7.00           215.25        .043       105.47     320.72
------------ -------------- ------------- ---------- ---------- -------------
5410         7.00           637.14        3.43       312.20     949.34
------------ -------------- ------------- ---------- ---------- -------------
5408         7.00           430.50        3.43       210.95     641.45
------------ -------------- ------------- ---------- ---------- -------------
5409         7.00           628.53        3.43       307.98     936.51
------------ -------------- ------------- ---------- ---------- -------------
Outside      30.00          2,400.00                            2,400.00
parking
spaces,
building
5428
------------ -------------- ------------- ---------- ---------- -------------
Outside      30.00          300.00                              300.00
parking
spaces,
building
5407-10
------------ -------------- ------------- ---------- ---------- -------------
Deduction    -15,000.00                                         -15,000.00
for saved
maintenance
measures
------------ ---------------------------- ---------- ---------- -------------
</TABLE>

<PAGE>

                          ACKNOWLEDGMENT OF TRANSLATION

                                 August 14, 2001

         The undersigned officer of the Registrant hereby acknowledges on behalf
of the Registrant that the foregoing translation of the Lease in Karlsruhe,
Germany between Bruker AXS GmbH and Siemens Industriepark Karlsruhe GmbH & Co.
oHG is a fair and accurate English translation from German of the original
executed agreement.

                                              BRUKER AXS INC.

                                              By: /s/ MARTIN HAASE
                                              ---------------------------------
                                              Martin Haase, President and Chief
                                              Executive Officer

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00031-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00031-of-00352.parquet"}]]