EXHIBIT 10.6        

            Severance Agreements have been executed by the Company and the
indicated employees, each substantially identical in all material respects to
the form of Severance Agreement filed as Exhibit 10.6 to the Company's 2000
Annual Report on Form 10-K except as noted below.

 

 

EMPLOYEE 

POSITION

DATE OF AGREEMENT

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

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  Neil M. Bardach

 Vice President - Finance
Chief Financial Officer
 

August 1, 1998

  Gordon S. Borteck 

Vice President, Organization 
   and Human Resources

    March 15, 2002

  Alain Bouruet-Aubertot

Senior Vice President - Minteq

November 25, 2002

  Michael A. Cipolla

Controller and Chief
Accounting Officer
 

March 1, 2001

  Howard R. Crabtree 

Senior Vice President, Minteq (Senior Vice President -  Technology and Logistics
as of November 25, 2002)

   March 15, 2002

  Anton Dulski

      Chief Operating Officer

January 1, 1997

  S. Garrett Gray

Vice President, General Counsel
and Secretary

   March 1, 2001

  D. Randy Harrison

Vice President and General Manager, 
   Performance Minerals

 March 15, 2002

 William Kromberg

Vice President - Taxes

March 1, 2001

  Kenneth Massimine

Senior Vice President,  Paper PCC

   March 15, 2002

 Paul R. Saueracker       Chairman, President and
        Chief Executive Officer

January 1, 1997

  John A. Sorel 

Senior Vice President, Corporate 
   Development and Finance
(Senior Vice President - Finance, Chief Executive Officer and Treasurer as of
November 25, 2002)

    March 15, 2002