Thaumasite
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| Thaumasite[1][2] | |
| Mineralogical name | Thaumasite |
| Chemical name | Calcium silicate carbonate sulfate dodekahydrate |
| Trivial name | |
| Chemical formula | Ca3Si(OH)6(CO3)(SO4)• 12H2O |
| Other forms | |
| Crystal system | |
| Crystal structure | |
| Deliquescence humidity 20°C | |
| Solubility (g/l) at 20°C | |
| Density (g/cm³) | 1.88-1.9 g/cm3 |
| Molar volume | |
| Molar weight | 622.4 g/mol |
| Transparency | transparent to translucent |
| Cleavage | indistinct to poor |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | not soluble in water |
| Crystal Optics | |
| Refractive Indices | no = 1.491 ne = 1.470 |
| Birefringence | Δ = 0.039 |
| Optical Orientation | negative |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
| {{{Literature}}} | |
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Weblinks[edit]
- ↑ http://webmineral.com/data/Thaumasite.shtml viewed on 29/07/2010
- ↑ http://www.mindat.org/min-3933.html viewed on 29/07/2010