Anhydrite: Difference between revisions
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Revision as of 20:38, 13 February 2015
Author: Amelie Stahlbuhk
back to Sulfate
| Anhydrite | |
| Mineralogical name | Anhydrite |
| Chemical name | Calcium sulfate |
| Trivial name | |
| Chemical formula | CaSO4 |
| Other forms | CaSO4•0.5H2O (Bassanite) CaSO4•2H2O (Gypsum) |
| Crystal system | orthorhombic |
| Crystal structure | |
| Deliquescence humidity 20°C | |
| Solubility (g/l) at 20°C | |
| Density (g/cm³) | 2.96 g/cm3 |
| Molar volume | 45.94 cm3/mol |
| Molar weight | 136.14 g/mol |
| Transparency | |
| Cleavage | |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | |
| Crystal Optics | |
| Refractive Indices | nx=1.5698 ny=1.5754 nz=1.6136 |
| Birefringence | Δ=0.0438 |
| Optical Orientation | positive |
| Pleochroism | |
| Dispersion | 43.7° |
| Used Literature | |
| <bib id="Robie.etal:1978"> | |
References[edit]
Literature[edit]
| [Dana:1951] | Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons |  |
| [Robie.etal:1978] | Robie R.A., Hemingway B.S.; Fisher J.A. (1978): Thermodynamic properties of minerals and related substances at 298.15 K and 1 bar pressure and higher temperatures. In: U.S. Geol. Surv. Bull, 1452 () | |
| [Dana:1951] | Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons | |