Calcium sulfate (data page)

This page provides supplementary chemical data on calcium sulfate.

Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the material safety data sheet for this chemical from a reliable source and follow its directions.

Structure and properties
Structure and properties
Index of refraction, nD ?
Abbe number ?
Dielectric constant, εr ? ε0 at ? °C
Bond strength ?
Bond length ?
Bond angle ?
Magnetic susceptibility -49.7 x 10−6 cm3/mol [1]
Melting point 1460 °C[2]
Solubility in H2O 0.205 g/100 g[2]

Thermodynamic properties
Phase behavior
Triple point ? K (? °C), ? Pa
Critical point ? K (? °C), ? Pa
Std enthalpy change
of fusion, ΔfusHo		 205.668 kJ/mol
Std entropy change
of fusion, ΔfusSo		 ? J/(mol·K)
Std enthalpy change
of vaporization, ΔvapHo		 ? kJ/mol
Std entropy change
of vaporization, ΔvapSo		 ? J/(mol·K)
Solid properties
Std enthalpy change
of formation, ΔfHosolid		 -1434.5 kJ/mol
Standard molar entropy,
Sosolid		 106.5 J/(mol K)
Heat capacity, cp 99.7 J/(mol K)
Liquid properties
Std enthalpy change
of formation, ΔfHoliquid		 ? kJ/mol
Standard molar entropy,
Soliquid		 ? J/(mol K)
Heat capacity, cp ? J/(mol K)
Gas properties
Std enthalpy change
of formation, ΔfHogas		 ? kJ/mol
Standard molar entropy,
Sogas		 ? J/(mol K)
Heat capacity, cp ? J/(mol K)

Spectral data
UV-Vis
λmax ? nm
Extinction coefficient, ε ?
IR
Major absorption bands ? cm−1
NMR
Proton NMR  
Carbon-13 NMR  
Other NMR data  
MS
Masses of
main fragments		  

Solubility product
  • CaSO4 · 2 H2O (gypsum) Ksp = ?; log Ksp = ?
  • CaSO4 · 0.5 H2O (bassanite) Ksp = ?; log Ksp = ?
  • CaSO4 (anhydrite) Ksp = ?; log Ksp = ?

References
  1. CRC handbook of chemistry and physics : a ready-reference book of chemical and physical data. Lide, David R. (84th ed.). Boca Raton, Fla.: CRC Press. 2003. pp. 4–131. ISBN 0849304849. OCLC 52548731.CS1 maint: others (link)
  2. CRC handbook of chemistry and physics : a ready-reference book of chemical and physical data. Lide, David R. (84th ed.). Boca Raton, Fla.: CRC Press. 2003. pp. 4–50. ISBN 0849304849. OCLC 52548731.CS1 maint: others (link)

Except where noted otherwise, data relate to standard ambient temperature and pressure.

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