Thermonatrite
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| Thermonatrite[1][2] | |
| Mineralogical name | Thermonatrite |
| Chemical name | Sodium carbonate hydrate |
| Trivial name | Sodium carbonate |
| Chemical formula | Na2CO3•H2O |
| Other forms | Natrite (Na2CO3) Sodium carbonate heptahydrate (Na2CO3•7H2O) Sodium carbonate decahydrate (Na2CO3•10H2O) |
| Crystal system | orthorhombic |
| Crystal structure | |
| Deliquescence humidity 20°C | 71% (35°C) |
| Solubility (g/l) at 20°C | 330 g/l |
| Density (g/cm³) | 2.255 g/cm3 |
| Molar volume | 55.11 cm3/mol |
| Molar weight | 124.01 g/mol |
| Transparency | transparent |
| Cleavage | poor to indistinct |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | alkaline in aqueous solution pH about 12 |
| Crystal Optics | |
| Refractive Indices | nx = 1.420 ny= 1.509 nz = 1.525 |
| Birefringence | Δ = 0.105 |
| Optical Orientation | biaxial negative |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
| {{{Literature}}} | |
back to Carbonate
Weblinks[edit]
- ↑ http://webmineral.com/data/Thermonatrite.shtml viewed on 09/06/2011
- ↑ http://www.mindat.org/min-3938.html viewed on 09/06/2011