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Epsomite, Epsom salt, or magnesium sulfate heptahydrate, is a hydrous magnesium sulfate mineral with formula MgSO4·7H2O.
Applications, Occurrence & Physical properties
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epsom water magnesium salt sulfate mineral encrustations also fibrous rarely formula mgso4 7h2o properties references orthorhombic known well salts cave
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Epsomite | 2V angle | Measured: 52° | 1.00 | infobox |
| Epsomite | Alters to | Dehydrates in dry air | 1.00 | infobox |
| Epsomite | Birefringence | δ = 0.028 | 1.00 | infobox |
| Epsomite | Category | Sulfate mineral | 1.00 | infobox |
| Epsomite | Cleavage | {010} perfect {101} distinct | 1.00 | infobox |
| Epsomite | Color | White, grey, colorless, or pink, greenish | 1.00 | infobox |
| Epsomite | Crystal class | Disphenoidal (222) H-M symbol: (2 2 2) | 1.00 | infobox |
| Epsomite | Crystal habit | Acicular to fibrous encrustations | 1.00 | infobox |
| Epsomite | Crystal system | Orthorhombic | 1.00 | infobox |
| Epsomite | Dana classification | 29.6.11.1 | 1.00 | infobox |
| Epsomite | Diaphaneity | Transparent to translucent | 1.00 | infobox |
| Epsomite | Formula | .mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:l… | 1.00 | infobox |
| Epsomite | Fracture | Conchoidal | 1.00 | infobox |
| Epsomite | IMA symbol | Esm | 1.00 | infobox |
| Epsomite | Luster | Vitreous, silky when fibrous | 1.00 | infobox |
| Epsomite | Mohs scale hardness | 2 | 1.00 | infobox |
| Epsomite | Optical properties | Biaxial (−) | 1.00 | infobox |
| Epsomite | Refractive index | nα = 1.433 nβ = 1.455 nγ = 1.461 | 1.00 | infobox |
| Epsomite | Solubility | In water | 1.00 | infobox |
| Epsomite | Space group | P2₁2₁2₁ | 1.00 | infobox |
| Epsomite | Specific gravity | 1.67–1.68 | 1.00 | infobox |
| Epsomite | Strunz classification | 7.CB.40 | 1.00 | infobox |
| Epsomite | Twinning | Rarely observed on {110} | 1.00 | infobox |
| Epsomite | Unit cell | a = 11.86, b = 11.99 c = 6.858 [Å]; Z = 4 | 1.00 | infobox |
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