nyuuzyou/wikis huggingface dataset:
Calcium formate

== Description ==
Colorless crystals or powder. Calcium formate is used as a preservative, as a buffer (pH 4) and in mineral tanning solutions.
[[[SliderGallery rightalign|calcium formate.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
calcium diformate; Calcoform
==Risks== 
* Ingestion, inhalation, and contact cause irritation. 
* Fisher Scientific: MSDS
==Physical and Chemical Properties==
Orthorhombic crystals. Slowly soluble in hot water (pH = 4). Insoluble in ethanol.
Composition 	CaC2H2O4
CAS 	544-17-2
Melting Point 	300 C
Density 	2.02 g/ml
Molecular Weight	mol. wt. = 130.11
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1642
Category:Materials database
Calcium hydroxide

== Description ==
A soft, white, alkaline powder. Calcium hydroxide, or slaked lime, is made by grinding quicklime (calcium oxide) with water; this forms a fine-grain precipitate. Calcium hydroxide absorbs carbon dioxide from the air forming calcium carbonate. It is used as a component in hydraulic cements because it will set underwater. Calcium hydroxide is also used to dehair hides, to kill insects, as a preservative in water paints and as a neutralizing agent in paper pulp solutions. A saturated solution of calcium hydroxide, called limewater, has a pH of 12.4.
== Synonyms and Related Terms ==
calcium (II) hydroxide; calcium dihydroxide; slaked lime; calcium hydrate; lime hydrate; caustic lime; limewater; milk of lime
== Risks ==
* Skin contact causes irritation. 
* Fisher Scientific: SDS
== Physical and Chemical Properties ==
Soluble in glycerol, acids. Slightly soluble in water. pH = 12.4 (saturated solution)Insoluble in alcohols.
Composition 	Ca(OH)2
CAS 	1305-62-0
Melting Point 	580 (dec)
Density 	2.08-2.34
Molecular Weight	mol. wt. = 74.1
== Resources and Citations ==
* Wikipedia: Calcium hydroxide Accessed Sept 2022
* T.Schaeffer, V.Blythe-Hill, J.Druzik "Aqueous Light Bleaching of Paper: Comparison of Calcium Hydroxide and Magnesium Bicarbonate Bathing Solutions" JAIC, 35:219-238, 1996.
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 505
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
Category:Materials database
Calcium hydroxyapatite

== Description ==
A white, odorless, tasteless powder. Bone is primarily composed of calcium hydroxyapatite mixed with calcium carbonate and organic binders. Calcium hydroxyapatite is used in the manufacture of milk glass, as a polishing powder, as a mordant and as a buffer. 
See also apatite.
== Synonyms and Related Terms ==
tribasic calcium phosphate; tricalcium orthophosphate; tricalcium phosphate; bone ash; hydroxylapatite
[[[SliderGallery rightalign|Hydroxyapatite PMA.TIF~FTIR (PMA)|Hydroxyapatite.png~Raman (RRUFF)|PIG540.jpg~XRD|f540sem.jpg~SEM|f540edsbw.jpg~EDS]]]
== Risks ==
* Nonflammable.
* Merz USA: SDS
== Physical and Chemical Properties ==
Soluble in mineral acids. Insoluble in water, ethanol, acetic acid.
Composition 	Ca10(PO4)6(OH)2
CAS 	1306-06-5
Melting Point 	1670 C
Density 	3.18 g/ml
Molecular Weight	mol. wt. = 1004.69
Refractive Index	1.63
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1741
Category:Materials database
Calcium hypochlorite

== Description ==
A white, crystalline solid. Calcium hypochlorite is a strong oxidizing bleach. It has been used in weak concentrations (0.5%) to bleach textiles and paper although it may leave traces or residual chloride. It is also used as a bactericide, fungicide, and disinfectant.
[[[SliderGallery rightalign|calcium hypochlorite.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
calcium hypochloride; bleaching powder; chloride of lime; calcium oxychloride; calcium salt of hypochlorous acid; Losantin; chlorinated lime
==Risks==
* Toxic chlorine gas may form when mixed with acids or ammonia. 
* Fire risk in contact with organic materials. 
* Severely corrosive to skin tissue on contact, inhalation, or ingestion. 
* The presence of trace heavy metals or their salts can accelerate oxidation. 
* Flinn Scientific: SDS
== Physical and Chemical Properties ==
Decomposes in water and ethanol.
Composition 	Ca(OCl)2
CAS 	7778-54-3
Density 	2.35 g/ml
Molecular Weight	mol. wt. = 142.98
== Resources and Citations ==
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002
* Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
* Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1648
Category:Materials database
Calcium light

== Description ==
An early type of light that produced an intense beam. Developed in 1816, calcium lights, or limelights, were used as spotlights for theater stages. They produced illumination by burning a piece of lime in an oxyhydrogen flame. A lens system was used to focus the brilliant white light into a strong beam.
== Synonyms and Related Terms ==
Drummond light; limelight; oxycalcium light; Acetylen-Lampe (Deut.); lampe à acétylène (Fr.); lâmpada de acetileno (Port.)
==Resources and Citations==
* Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Calcium nitrate

== Description ==
A white, deliquescent solid that is a strong oxidizing agent. Calcium nitrate was first produced commercially in Notodden, Norway in 1905. It is used in pyrotechnics, explosives, and match heads. Calcium nitrate has been identified as a deleterious accretion in wall paintings (Piqué et al 1992). The efflorescence also occurs when manure or other nitrogeneous compounds contact limestone in a dry environment.
[[[SliderGallery rightalign|Calcium nitrate.TIF~FTIR (MFA)]]]
== Synonyms and Related Terms ==
calcium dinitrate; lime nitrate; nitrocalcite; lime saltpeter; Norwegian saltpeter (Norgessalpeter); air saltpeter; calciumnitrat (Dan.); Kalksalpeter (Nor.); CalciNit
==Risks== 
* Fire risk in contact with organic compounds. 
* Integrachem: SDS
==Physical and Chemical Properties==
Soluble in water, methanol, ethanol, acetone. pH = 6.0 (5% solution)
Composition 	Ca(NO3)2 - 4H2O
CAS 	10124-37-5 (Anhydrous) 13477-34-4 (Tetrahydrate)
Melting Point 	42-45 C (hydrated)
Density (g/ml) 	1.82 (hydrated); 2.36 (dry)
Molecular Weight	mol. wt. = 236.15
==Resources and Citations==
* F.Piqué, L.Dei, E.Ferroni "Physicochemical Aspects of the Deliquescence of Calcium Nitrate and Its Implications for Wall Painting Conservation" Studies in Conservation 37:217-227, 1992.
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1729
* Wikipedia: http://en.wikipedia.org/wiki/Calcium_nitrate (Accessed Jan. 15, 2006)
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Category:Materials database
Calcium oxalate

== Description ==
White, crystalline powder that occurs naturally as the minerals whewellite and weddellite. Calcium oxalate also occurs in some plants such as dumb cane, rhubarb and spinach. The powdered mineral is used in ceramic glazes. Calcium oxalate forms naturally on the surface of weathered calcareous stones due to reaction of oxalic acid excretions from some types of lichen and fungi. Since calcium oxalate is less soluble than calcium carbonate in acids, the production of thin films of calcium oxalate has been investigated as a protective surface treatment for limestone (Cezar 1998).
[[[SliderGallery rightalign|Calcium oxalate.TIF~FTIR (MFA)]]]
== Synonyms and Related Terms ==
whewellite; weddellite; ethanedioic acid calcium salt
== Risks ==
* Contact may cause irritation. 
* Ingestion is harmful. 
* Fisher Scientific: MSDS
==Physical and Chemical Properties==
Soluble in dilute mineral acids. Insoluble in water, acetic acid. Slightly hygroscopic.
Composition 	CaC2O4
CAS 	5794-28-5
Melting Point 	200 C
Density 	2.2 g/ml
Molecular Weight	mol. wt. = 128.1
==Resources and Citations==
* T.M. Cezar, "Calcium Oxalate: A Surface Treatment for Limestone" Journal of Museum Studies, No. 4, May 1988: http://www.jcms.ucl.ac.uk/issue4/cezar.html 
* M. del Monte, C. Sabbioni, G.Zappia. The origin of calcium oxalates on historical buildings, monuments and natural outcrops. The science of the total environment 67, (1987), pp. 17-39 
* B. Ford, I.MacLeod, P.Haydock, "Rock art pigments from Kimberley region of Western Australia: identification of the minerals and conversion mechanisms." Studies in conservation 39, no. 1 (1994), pp. 57-69
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1732
* Wikipedia: http://en.wikipedia.org/wiki/Calcium_oxalate (Accessed Sept 2 2005)
Category:Materials database
Calcium oxide

== Description ==
White, alkaline lumps obtained from the thermal decomposition of limestone or seashells. Calcium oxide is a refractory solid that becomes incandescent at temperatures near its melting point (2500C). In 1816, prior to the development of electrical lights, calcium oxide was used for bright white illumination, called limelights. Calcium oxide is primarily used in the manufacture of slaked limes for mortar, plasters, and cements. It is also used as a refractory and flux in manufacturing steel and glass. Calcium oxide is added to paper pulp for pH control and phosphate removal. The inexpensive, hygroscopic material is added to petroleum for water removal.
== Synonyms and Related Terms ==
lime; quicklime; burnt lime; calx; unslaked lime; fluxing lime
== Risks ==
* Skin contact causes irritation and burns. 
* Fire risk in contact with organic materials. 
* Fisher Scientific: SDS
== Physical and Chemical Properties ==
* Soluble in acid. 
* Hygroscopic. 
* Reacts with water to form calcium hydroxide with evolution of heat.
Composition 	CaO
CAS 	1305-78-8
Melting Point 	2570 C
Density 	3.40 g/ml
Molecular Weight	mol. wt. = 56.1
Boiling Point 	2850 C
== Resources and Citations==
* Wikipedia: Calcium oxide Accessed July 2023
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Henry Hodges, Artifacts: An Introduction to Early Materials and Technology, Ronald P. Frye, Kingston, Canada, 1988
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1733
Category:Materials database
Calcium phosphate

== Description ==
Calcium phosphate occurs in three forms: monobasic, dibasic, and tribasic. All are used as fertilizers and buffers as well as in the manufacture of glass and ceramics. Tribasic calcium phosphate, or calcium hydroxyapatite, is found in bones, antlers, teeth, and ivory.
== Synonyms and Related Terms ==
Phosphate of lime
Category:Materials database
Calcium silicate

== Description ==
Any of the silicates of calcium. Calcium silicate occurs naturally in several minerals: wollastonite, diopside, anorthite, lawsonite and tremolite. Calcium silicates are used in the manufacture of glass, porcelain, molecular sieves, wallboard, and portland cement. Wollastonite is used as a bubble-free white opacifier in glazes. Calcium silicates are also used as fillers for paper and plastics. In general, they are highly absorbent.
== Synonyms and Related Terms ==
tabular spar; calcium metasilicate; wollastonite; diopside; anorthite; tremolite; lawsonite; portland cement
== Risks ==
* Inhalation of dust causes irritation.
* ThermoFisher: SDS
==Physical and Chemical Properties==
Forms gel with acids. Insoluble in water but can absorb up to 6 times its weight of water.
Composition	CaSiO3
CAS 	1344-95-2
Density 	2.9 g/ml
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1749
Category:Materials database
Calcium stearate

== Description ==
A waxy white powder first isolated for commercial use in 1924. Calcium stearate is used industrially as a flatting agent in paints, a waterproofing agent in cements, and as a solid-phase lubricant for plastics. For foods, calcium stearate is used as a bread dough conditioner, an emulsifier, an anti-dusting agent, a thickener, and as a release agent.
[[[SliderGallery rightalign|aaiCA_STEAR.jpg~FTIR]]]
== Synonyms and Related Terms ==
calcium octadecanoic acid; stearic acid calcium salt;
== Risks ==
* Available in technical and food grades. 
* Combustible.
* ThermoFisher: SDS
==Physical and Chemical Properties==
Insoluble in water, ether, chloroform, acetone and cold alcohol. Slight soluble in hot alcohol and hot oils. Soluble in hot pyridine.
Composition 	Ca(C18H35O2)2
CAS 	1592-23-0
Melting Point 	179 C
Density 	1.04-1.12 g/ml
Molecular Weight	607.03
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 557
* USDA website at http://www.ams.usda.gov/nop/NationalList/TAPReviews/CalciumStearate2.pdf (Accessed Sept 23, 2005)
Category:Materials database
Calcium sulfate

== Description ==
Commonly found in three forms: anhydrous (anhydrite), dihydrate (gypsum) and hemihydrate (plaster of Paris). Anhydrite is a colorless, inert pigment which is often used as a paper filler. Calcium sulfate dihydrate is used in the manufacture of portland cement. Gypsum is also used as a filler and pigment in paints, enamels, glazes, and paper. Plaster of Paris is used for wall plaster, wallboard, moldings, and statuary.
See more information on the pages for each form of hydration.
== Synonyms and Related Terms ==
anhydrite; gypsum; plaster; terra alba; alabaster; calcium sulphate (Br.); mineral white; crown filler; alabastine; pearl filler
== Risks ==
* Noncombustible
==Physical and Chemical Properties==
Particle size = 0.2 micrometers
Composition 	CaSO4
CAS 	10101-41-4
Molecular Weight	mol. wt. = 136.14
Refractive Index	1.21; 1.52; 1.53
== Comparisons ==
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1753
* The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
* Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
* Thomas B. Brill, Light Its Interaction with Art and Antiquities, Plenum Press, New York City, 1980 Comment: ref. index = 1.21; 1.52; 1.53
Category:Materials database
Calcium sulfate, anhydrous

== Description ==
White, odorless crystals whose mineral form is called anhydrite. Anhydrous calcium sulfate is ground to form a colorless, inert pigment which is often used as a paper filler. It is strongly hygroscopic and is also used as a drying agent for solids, organic liquids, and gases. Anhydrous calcium sulfate is commercially sold under the name of Drierite. Its drying capacity can be regenerated an unlimited number of times.
== Synonyms and Related Terms ==
anhydrite; karstenite; muriacite; anhydrous sulfate of lime; anhydrous gypsum; 
Brand names: Drierite (contains cobalt chloride as an indicator)
[[[SliderGallery rightalign|anhydriteRS.jpg~Raman|calcium sulfate, anhydrous.jpg~Chemical structure]]]
== Risks ==
* IntegraChem: SDS
==Physical and Chemical Properties==
Slightly soluble in water.
Composition 	CaSO4
CAS 	7778-18-9
Mohs Hardness 	3.0 - 3.5
Melting Point 	1450 C
Density 	2.93-2.964 g/ml
Molecular Weight	mol. wt. = 136.14
Refractive Index	1.570; 1.614; 1.575
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
* Encyclopedia Britannica, http://www.britannica.com Comment: 'anhydrite' [Accessed December 4, 2001]
* R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966 Comment: density=2.93 ref. index=1.570; 1.614; 1.575
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
* C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
Category:Materials database
Calcium sulfate, dihydrate

== Description ==
White lumps or powder that is commonly called by its mineral name of gypsum. Calcium sulfate dihydrate is used in the manufacture of portland cement. Gypsum is also used as a filler and pigment in paints, enamels, glazes and paper.
== Synonyms and Related Terms ==
native calcium sulfate; precipitated calcium sulfate; gypsum; alabaster; selenite; terra alba; satinite; mineral white; satin spar; light spar; Pigment White 25
[[[SliderGallery rightalign|CalciumsulfatedihydrateMFAIR.jpg~FTIR|PIGCASO4.jpg~XRD]]]
== Risks ==
* Noncombustible.
* ThermoFisher: SDS
==Physical and Chemical Properties==
* Soluble in water. Slightly soluble in glycerol. Insoluble in most organic solvents. 
* Gypsum fluoresces purple.
Composition 	CaSO4-2H2O
CAS 	13397-24-5
Mohs Hardness 	1.5 - 2.0
Melting Point 	100-150 C
Density 	2.32-2.36 g/ml
Molecular Weight	mol. wt. = 172.2
Refractive Index	1.520; 1.530; 1.523
== Comparisons ==
==Resources and Citations==
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1753
Category:Materials database
Calcium sulfate, hemihydrate

== Description ==
Fine-grain, odorless powder commonly called plaster of Paris. Hemihydrate calcium sulfate naturally occurs as the mineral bassanite, but is commonly made by partially calcining gypsum. When mixed with water, plaster of Paris will dry to a hard mass. It is used for wall plasters, wallboard, moldings, and statuary.
== Synonyms and Related Terms ==
bassanite; plaster of Paris; dried calcium sulfate; dried gypsum; plaster;
== Risks ==
* Ingestion may be harmful. 
* Anmol Chemicals: SDS
==Physical and Chemical Properties==
Composition 	CaSO4-0.5H2O
CAS 	7778-18-9
Melting Point 	163 C
Density 	2.5 - 2.7 g/ml
Molecular Weight	mol. wt. = 145.15
== Resources and Citations ==
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1753
Category:Materials database
Calcium sulfite

== Description ==
White powder. Calcium sulfite is used for bleaching paper pulp and textiles. It is also used as an antichlor, disinfectant, and food preservative.
==Risks==
* American Elements: SDS
==Physical and Chemical Properties==
Soluble in acids with the evolution of sulfur dioxide. Slightly soluble in water, ethanol.
Composition 	CaSO3-2H2O
Melting Point 	100 C
Molecular Weight	mol. wt. = 120.14
Refractive Index	1.590, 1.595, 1.628
==Resources and Citations==
* G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 132
* Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
* Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
* The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1755
* CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.545, 1.560, 1.605
Category:Materials database
Calclacite

== Description ==
A mineral sometimes found as an efflorescence on archaeological ceramics that are stored in wooden cases, particularly those made of oak.\. Calclacite is dual calcium salt of chloride and acetic acid. It may be formed from the interaction of acid vapors from the wood storage cases with the objects and chloride salts acquired during burial. Its composition is CH3CO2CaCl-5H2O.
== Synonyms and Related Terms ==
calcium acetate chloride pentahydrate
==Resources and Citations==
* E.FitzHugh, R.Gettens, "Calclacite and Other Efflorescent Salts on Objects Stored in Wooden Museum Cases" in Science and Archaeology, R. Brill (ed.), MIT Press, Cambridge, MA, 1971. 
* A.B.Paterakis "A Preliminary Study of Salt Efflorescence in the Collection of the Ancient Agora, Athens, Greece" in ICOM Preprints, Los Angeles, 1990. p.675-679.
* WebMinerals: Link
Category:Materials database
Caledonia brown

== Description ==
A brown earth pigment containing a mixture of iron oxides and clay. Caledonia brown is an inferior paint pigment. 
See burnt sienna.
== Synonyms and Related Terms ==
Pigment Brown 6 and 7; CI 77491, 77492; Marrone di Caledonia (It.)
== Risks ==
No significant hazards.
Category:Materials database
Caledonia white

== Description ==
An obsolete name for a 19th century pigment composed of lead chlorosulfite (Mayer 1969).
== Synonyms and Related Terms ==
Caledonian white (AAT); bianco di Caledonia (It.); lead chlorosulfite
==Resources and Citations==
* Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
Category:Materials database