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Gypsum (CaSO4 - 2H2O)
Categories: Ceramic

Material Notes: Alabaster is a fine grained, translucent gypsum. Three cleavage directions. Occurrence: Formed by evaporation; found in sediments and desert floor. Common in efflorescence. Crystallization Pressure for C/CS = 2 is 282 atm at 0°C. Crystallization Pressure for C/CS = 2 is 334 atm at 50°C.Crystallization Pressure for C/CS = 10 is 938 atm at 0°C. Crystallization Pressure for C/CS = 10 is 1110 atm at 50°C.Crystallization Pressure for C/CS = 50 is 1595 atm at 0°C. Crystallization Pressure for C/CS = 50 is 1900 atm at 50°C.

Property values are typical of naturally occurring Gypsum (CaSO4 - 2H2O). Actual property values will vary from sample to sample.

Key Words: Gypsum (CaSO4 - 2H2O)
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Physical PropertiesOriginal ValueComments
Density 2.32 g/cc
Solubility 1750 - 2150 ppmFreshwater
Molecular Weight 127 g/mol
 
Chemical PropertiesOriginal ValueComments
Molar Volume 55 cc/mol
 
Mechanical PropertiesOriginal ValueComments
Hardness, Knoop 46 - 54
Hardness, Vickers 60
Hardness, Mohs 2.0
Abrasive Hardness 1.25
Drilling Hardness 8.3
 
Descriptive Properties
ColorWhite

References for this datasheet.

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BMIN056 / 199

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