释义 |
- Solubility product
- References
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. - Calcium Sulfate Dihydrate: Excaliber Minerals LLC
- Calcium Sulfate Anhydrous: ScienceLab.com, Inc.
== 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 | ? | |
== 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 Except where noted otherwise, data relate to standard ambient temperature and pressure. Disclaimer applies. 3 : Chemical data pages|Calcium compounds|Sulfate minerals |