Epsomite: Difference between revisions
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|Crystal_System = orthorhombic | |Crystal_System = orthorhombic | ||
|Crystal_Structure = | |Crystal_Structure = | ||
|Deliqueszenzhumidity = 90,1 | |Deliqueszenzhumidity = 90,1% (20°C), 94% (30°C) | ||
|Solubility = 710 g/l | |Solubility = 710 g/l | ||
|Density = 146,8 cm<sup>3</sup>/mol | |Density = 146,8 cm<sup>3</sup>/mol | ||
Revision as of 09:50, 7 July 2011
| Epsomite[1][2] | |
| |
| Mineralogical name | Epsomite |
| Chemical name | Magnesiumsulphate Heptahydrate |
| Trivial name | Bitter Salts, Reichardtite, Seelandite |
| Chemical formula | MgSO4•7H2O |
| Other forms | Kieserite (MgSO4•H2O) Sanderite (MgSO4•2H2O) Starkeyite (MgSO4•4H2O) Pentahydrite(MgSO4•5H2O) Hexahydrite (MgSO4•6H2O) Meridianite (MgSO4•11H2O) Magnesium 12-Hydrate |
| Crystal system | orthorhombic |
| Crystal structure | |
| Deliquescence humidity 20°C | 90,1% (20°C), 94% (30°C) |
| Solubility (g/l) at 20°C | 710 g/l |
| Density (g/cm³) | 146,8 cm3/mol |
| Molar volume | 246,48 g/mol |
| Molar weight | 1,67 g/cm3 |
| Transparency | transparent to translucent |
| Cleavage | perfect |
| Crystal habit | |
| Twinning | |
| Phase transition | |
| Chemical behavior | |
| Comments | can by produced from an aqueous solution under 50°C |
| Crystal Optics | |
| Refractive Indices | nx = 1,433 ny = 1,455 nz = 1,461 |
| Birefringence | Δ = 0,028 |
| Optical Orientation | biaxial negative |
| Pleochroism | |
| Dispersion | |
| Used Literature | |
| {{{Literature}}} | |
back to Sulphate
Weblinks[edit]
- ↑ http://webmineral.com/data/Epsomite.shtml seen on 29.072010
- ↑ http://www.mindat.org/min-1393.html seen on 29.072010