Thaumasite: Difference between revisions
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|chemical_Formula = Ca<sub>3</sub>Si(OH)<sub>6</sub>(CO<sub>3</sub>)(SO<sub>4</sub>)•<br>12H<sub>2</sub>O | |chemical_Formula = Ca<sub>3</sub>Si(OH)<sub>6</sub>(CO<sub>3</sub>)(SO<sub>4</sub>)•<br>12H<sub>2</sub>O | ||
|Hydratforms = | |Hydratforms = | ||
| | |Crystal_System = | ||
|Crystal_Structure = | |Crystal_Structure = | ||
|Deliqueszenzhumidity = | |Deliqueszenzhumidity = | ||
Revision as of 08:43, 10 June 2011
| Thaumasite[1][2] | |
| Mineralogical name | Thaumasite |
| Chemical name | Calcium silicate carbonate sulphate 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}}} | |
back to Sulphate
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