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Epsomiet
| Epsomiet | |
|---|---|
| |
| Epsomiet | |
| Formule | MgSO4.7H2O |
| Onsuiwerhede | Ni,Fe,Co,Mn,Zn |
| Nickel-Strunz (10) | 7.CB.40 |
| Kleur | wit, grys, kleurloos, pienk, groenerig[1] |
| Streep | wit[1] |
| Glans | glasagtig, syerig, aardagtig [1] |
| Hardheid | 2-2,5 (Mohs)[1] |
| Digtheid | 1,675-1,679 g/cm3[1] |
| Optiese eienskappe | |
| Dubbelbreking | tweeassig (-) |
| RI-waardes | nα = 1.433 nβ = 1.455 nγ = 1.461[1] |
| Kristallografie | |
| Kristalsisteem | ortorombies |
| Ruimtegroep | P212121 |
| Strukturbericht-kode | H4₁₂ |
| Nommer | 19 |
| Eenheidsel | a = 1186 pm, b = 1199 pm, c = 685,8 pm |
| |
| * Lys van minerale | |
Portaal  Geologie
| |
Epsomiet is 'n hidraat van magnesiumsulfaat. Dit is 'n mineraal wat dikwels in beskutte kolle op uitlopers van dolomitiese of kalkagtige rotse aangetref word. Dit is 'n evaporiet wat in soutmeerafsettings voorkom en op mure van grotte en myne. Soms op houtstutte of verlate toerusting.
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