Gypsum: Difference between revisions
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{{Infobox_Salt | {{Infobox_Salt | ||
|Footnote = <ref>http://webmineral.com/data/Gypsum.shtml seen on 30.07.2010</ref><ref>http://www.mindat.org/min-1784.html seen on 30.07.2010</ref> | |Footnote = <ref>http://webmineral.com/data/Gypsum.shtml seen on 30.07.2010</ref><ref>http://www.mindat.org/min-1784.html seen on 30.07.2010</ref> | ||
|photo = SA101 1.jpeg|300px | |photo = [[File:SA101 1.jpeg|300px]] | ||
|mineralogical_Name = Gypsum, Selenite | |mineralogical_Name = Gypsum, Selenite | ||
|chemical_Name = Calcium sulphate dihydrate | |chemical_Name = Calcium sulphate dihydrate | ||
Revision as of 11:21, 8 June 2011
| Gypsum[1][2] | |
| |
| Mineralogical name | Gypsum, Selenite |
| Chemical name | Calcium sulphate dihydrate |
| Trivial name | Gypsite, Sulphate of Lime |
| Chemical formula | Ca[SO4]•2H2O |
| Other forms | Anhydrite (CaSO4) Hemihydrate (CaSO4•0,5H2O) |
| Crystal system | {{{Crystal_System}}} |
| Crystal structure | |
| Deliquescence humidity 20°C | |
| Solubility (g/l) at 20°C | |
| Density (g/cm³) | 2,2-2,4 g/cm³ |
| Molar volume | 74,69 cm3/mol |
| Molar weight | 172,17g /mol |
| Transparency | |
| Cleavage | |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | |
| Crystal Optics | |
| Refractive Indices | α = 1,519-1,521 β = 1,522-1,523 γ = 1,529-1,530 |
| Birefringence | Δ = 0,010 |
| Optical Orientation | biaxial positive |
| Pleochroism | |
| Dispersion | 58° |
| Used Literature | |
| {{{Literature}}} | |
back to Sulphate
Weblinks[edit]
- ↑ http://webmineral.com/data/Gypsum.shtml seen on 30.07.2010
- ↑ http://www.mindat.org/min-1784.html seen on 30.07.2010