epsomite
Sign in to saveAlso known as magnesium sulfate heptahydrate
Epsomite, Epsom salt, or magnesium sulfate heptahydrate, is a hydrous magnesium sulfate mineral with formula .
Key facts
- Mineral.name
- Epsomite
- Mineral.category
- Sulfate mineral
- Mineral.image
- Epsomita 01.jpg
- Mineral.caption
- Epsomite formation from a Calatayud, Spain cave
- Mineral.IMAsymbol
- Esm
- Mineral.strunz
- 7.CB.40
- Mineral.dana
- 29.6.11.1
- Mineral.system
- Orthorhombic
- Mineral.class
- Disphenoidal (222) H-M symbol: (2 2 2)
- Mineral.symmetry
- P2₁2₁2₁
- Mineral.unit cell
- = 11.86, = 11.99 = 6.858 [Å];
- Mineral.color
- White, grey, colorless, or pink, greenish
- Mineral.habit
- Acicular to fibrous encrustations
- Mineral.twinning
- Rarely observed on {110}
- Mineral.cleavage
- {010} perfect {101} distinct
- Mineral.fracture
- Conchoidal
- Mineral.mohs
- 2
- Mineral.luster
- Vitreous, silky when fibrous
via Wikipedia infobox
Wikidata facts
- Image
- Epsomita 01.jpg
Show 9 more facts
- refractive index
- 1.455
- density
- 1.67
- Mohs' hardness
- 2
- Commons category
- Epsomite
- chemical formula
- MgSO₄·7H₂O
- Nickel-Strunz 9th edition (updated 2009)
- 7.CB.40
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 7.CB.40
- IMA Mineral Symbol
- Esm
- Strunz 8th edition (series ID, updated)
- VI/C.03d
Sources (1)
via Wikidata · CC0
~4 min read
Article
7 sectionsContents
- Physical properties
- Etymology
- Occurrence
- Uses
- Gallery
- See also
- References
{{Infobox mineral | name = Epsomite | category = Sulfate mineral | boxwidth = | boxbgcolor = | image = Epsomita 01.jpg | imagesize = | caption = Epsomite formation from a Calatayud, Spain cave | formula = | IMAsymbol = Esm | strunz = 7.CB.40 | dana = 29.6.11.1 | system = Orthorhombic | class = Disphenoidal (222) H-M symbol: (2 2 2) | symmetry = P2₁2₁2₁ | unit cell = = 11.86, = 11.99 = 6.858 [Å]; | color = White, grey, colorless, or pink, greenish | colour = | habit = Acicular to fibrous encrustations | twinning = Rarely observed on {110} | cleavage = {010} perfect {101} distinct | fracture = Conchoidal | tenacity = | mohs = 2 | luster = Vitreous, silky when fibrous | streak = | diaphaneity = Transparent to translucent | gravity = 1.67–1.68 | density = | polish = | opticalprop = Biaxial (−) | refractive = = 1.433 = 1.455 = 1.461 | birefringence = = 0.028 | pleochroism = | 2V = Measured: 52° | dispersion = | extinction = | length fast/slow = | fluorescence= | absorption = | melt = | fusibility = | diagnostic = | solubility = In water | other = | alteration = Dehydrates in dry air | references = }}
Epsomite, Epsom salt, or magnesium sulfate heptahydrate, is a hydrous magnesium sulfate mineral with formula .