Bassanite
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| Bassanite[1][2] | |
| Mineralogical name | Bassanite |
| Chemical name | Calciumsulfate hemihydrate |
| Trivial name | |
| Chemical formula | CaSO4•0.5H2O |
| Other forms | |
| Crystal system | monoclinic |
| Crystal structure | |
| Deliquescence humidity 20°C | |
| Solubility (g/l) at 20°C | 3.0 g/l |
| Density (g/cm³) | 2.64 g/cm3 |
| Molar volume | 55.04 cm3/mol |
| Molar weight | 145.15 g/mol |
| Transparency | transparent to translucent |
| Cleavage | |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | hardly soluble in water |
| Crystal Optics | |
| Refractive Indices | no = 1.558 ne = 1.586 |
| Birefringence | Δ = 0.028 |
| Optical Orientation | positive |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
| [Broul.etal:1981]Title: Solubility in organic two component systems Author: Broul M., Nyvlt J.; Soehnel O.  [Dana:1951]Title: Dana's System of MineralogyAuthor: Dana J.D.
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back to Sulfate
Weblinks[edit]
- ↑ http://webmineral.com/data/Bassanite.shtml seen on 29.07.2010
- ↑ http://www.mindat.org/min-557.html seen on 29.07.2010
Literature[edit]
| [Broul.etal:1981] | Elsevier (eds.) Broul M., Nyvlt J.; Soehnel O. (1981): Solubility in organic two component systems, Elsevier | |
| [Dana:1951] | Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons | |