Epsomite, Epsom salt, or magnesium sulfate heptahydrate, is a hydrous magnesium sulfate mineral with formula MgSO4·7H2O.
Epsomite crystallizes in the orthorhombic system as rarely found acicular or fibrous crystals; the normal form is as massive encrustations. It is colorless to white with tints of yellow, green and pink. It is a soft mineral with variable Mohs hardness around 2.0~2.5, and it has a low specific gravity of 1.67 g/ml.
It is readily soluble in water. It absorbs water from the air and converts to hexahydrate with the loss of one water molecule and a switch to monoclinic structure.
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^"Epsomite". Web Mineral (webmineral.com).
^"Epsomite". Mindat.org.
^Epsomite (PDF) (Report). Handbook of Mineralogy – via Dept. Geology, University of Arizona.
Epsomite, Epsom salt, or magnesium sulfate heptahydrate, is a hydrous magnesium sulfate mineral with formula MgSO4·7H2O. Epsomite crystallizes in the...
It was described in 1847. Goslarite belongs to the epsomite group which also includes epsomite (MgSO4 · 7 H2O) and morenosite (NiSO4 · 7 H2O). Goslarite...
volcanic fumaroles. Associated minerals include pisanite, chalcanthite, epsomite, pickeringite, halotrichite and other sulfate minerals. It was first described...
(4): 719. doi:10.1139/b74-093. Jenkins, O. P. (1918). "Spotted lakes of epsomite in Washington and British Columbia". American Journal of Science. 46 (275):...
Common minerals that are found in these deposits include blödite, borax, epsomite, gaylussite, glauberite, mirabilite, thenardite and trona. Non-marine deposits...
rarely in caves. It occurs in association with basaluminite, gibbsite, epsomite, gypsum, celestine, dolomite and goethite. It was first described in 1807...
Associated minerals include gypsum, halite, thenardite, trona, glauberite, and epsomite. Mirabilite is unstable and quickly dehydrates in dry air, the prismatic...
halite, carnallite, polyhalite, anhydrite, boracite, sulfoborite, leonite, epsomite and celestine. In early 2005, Mars Express, a European Space Agency orbiter...
lacustrine sediments and coal seams. Associated minerals include melanterite, epsomite, jarosite, gypsum, sulfur, pyrite, marcasite and limonite. It was first...
(K2Mg2(SO4)2) sylvite (KCl) – currently used polyhalite (K2MgCa2(SO4)4•2H2O) Epsomite (MgSO 4·7H 2O) kieserite (MgSO 4·H 2O) Even further back in the early 20th...
ice-cores. It is commonly associated with other evaporite minerals such as epsomite, mirabilite, halides, and other sodium-magnesium-sulfates. There is some...
(also known as "gypsum flowers" or "oulopholites") consist of gypsum or epsomite. In contrast to anthodites, the needles or "petals" of cave flowers grow...
dissolved minerals that contain sulfate. These include baryte (BaSO4), epsomite (MgSO4 7H2O) and gypsum (CaSO42H20). It is reported that a notable change...
MgSO4(H2O)6 [Mg(H2O)6] none hexahydrate common motif MgSO4(H2O)7 [Mg(H2O)6] one epsomite common motif TiOSO4(H2O) [Ti(μ-O)2(H2O)(κ1-SO4)3] none further hydration...
Bernardino County, California, in the United States. It was built to carry epsomite from a deposit in the Owlshead Mountains to a siding of the Trona Railway...
for 28 miles from a connection on the Trona Railway, eastward to harvest epsomite deposits in the Owlshead Mountains. This Lartigue type monorail achieved...
addition to the commodities listed, barite, bench gravel, coal, dolomite, epsomite, and kaolin may have been produced, but available information was inadequate...
mineral Iron sulfate compounds (e.g., jarosite, schwertmannite, gypsum, and epsomite) H-Clay (hydrogen clay, with a large fraction of adsorbed H+ ions, a stable...
water. The European Space Agency's Mars Express found evidence of perhaps epsomite and kieserite. Scientists want to visit these areas with robotic rovers...
It forms in fumaroles and in caves. It occurs with kalinite, alunogen, epsomite, melanterite, copiapite and gypsum. It was first described in 1844 for...
Thenardite occurs at its southern reaches and there is amorphous silica, clay, epsomite and limonite. Other rare salt types form efflorescences at the margins...
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