Thaumasite
Jump to navigation
Jump to search
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