Ettringite
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| Ettringite[1][2] | |
| Mineralogical name | Ettringite |
| Chemical name | Calcium aluminium sulfate hydrate |
| Trivial name | |
| Chemical formula | Ca6Al2(SO4)3(OH)12•26H2O |
| Other forms | |
| Crystal system | hexagonal |
| Crystal structure | |
| Deliquescence humidity 20°C | |
| Solubility (g/l) at 20°C | |
| Density (g/cm³) | 1.8 g/cm3 |
| Molar volume | |
| Molar weight | 1255.11 g/mol |
| Transparency | transparent |
| Cleavage | perfect |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | not soluble in water |
| Crystal Optics | |
| Refractive Indices | no = 1.491 ne = 1.470 |
| Birefringence | Δ = 0.021 |
| Optical Orientation | negative |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
| {{{Literature}}} | |
back to Sulfate
Weblinks[edit]
- ↑ http://webmineral.com/data/Ettringite.shtml viewed on 29/07/2010
- ↑ http://www.mindat.org/min-1414.html viewed on 29/07/2010