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Epsomite Mineral Data |
General Epsomite Information |
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MgSO4•7(H2O) | ||
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Molecular Weight = 246.48 gm | ||
Magnesium 9.86 % Mg 16.35 % MgO | |||
Hydrogen 5.73 % H 51.16 % H2O | |||
Sulfur 13.01 % S 32.48 % SO3 | |||
Oxygen 71.40 % O | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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Mg(SO4)•7(H2O) | ||
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White efflorescence on cave walls, volcanic exhalations, or deposited by Mg sulfate spring waters. | ||
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Valid Species (Pre-IMA) 1824 | ||
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Lake-bed deposits on Kruger Mountain, Oregon. Link to MinDat.org Location Data. | ||
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The mineral has long been known from the deposits associated with the mineral waters at Epsom, Surrey, England. | ||
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Epsomite ![]() |
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Bitter Salt | ||
Epsom Salts | |||
ICSD 29384 | |||
PDF 36-419 | |||
Reichardite - massive | |||
Epsomite Image | |||
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Epsomite Crystallography |
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a:b:c =0.9891:1:0.5719 | ||
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a = 11.86, b = 11.99, c = 6.858, Z = 4; V = 975.22 Den(Calc)= 1.68 | ||
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Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 212121 | ||
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By Intensity(I/Io): 4.21(1), 2.677(0.25), 5.35(0.25), | ||
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Mouse |
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Physical Properties of Epsomite |
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{010} Perfect, {101} Distinct | ||
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Colorless, White, Yellowish white, Greenish white, Pinkish white. | ||
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1.67 - 1.68, Average = 1.67 | ||
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Transparent to translucent | ||
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Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
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Acicular - Occurs as needle-like crystals. | ||
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Encrustations - Forms crust-like aggregates on matrix. | ||
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Fibrous - Crystals made up of fibers. | ||
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2-2.5 - Gypsum-Finger Nail | ||
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Non-fluorescent. | ||
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Vitreous (Glassy) | ||
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Nonmagnetic | ||
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white | ||
Optical Properties of Epsomite |
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CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.013 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2677,KPDmeas= 0.2685,KC= 0.2642 Ncalc = 1.44 |
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Biaxial (-), a=1.433, b=1.455, g=1.461, bire=0.0280, 2V(Calc)=54, 2V(Meas)=52. Dispersion none. | ||
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none. | ||
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none. | ||
Calculated Properties of Epsomite |
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Bulk Density (Electron Density)=1.77 gm/cc note: Specific Gravity of Epsomite =1.68 gm/cc. |
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Fermion Index = 0.01 Boson Index = 0.99 |
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PEEpsomite = 1.14 barns/electron U=PEEpsomite x rElectron Density= 2.03 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Epsomite is Not Radioactive |
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Epsomite Classification |
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29.06.11.01 (29)Hydrated Acid and Sulfates | ||
(29.06)where A XO4 � x(H2O) | |||
(29.06.11)Epsomite Group | |||
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07.CB.40 07 - SULFATES (SELENATES, TELLURATES) | ||
07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O | |||
07.CB -With only medium-sized cations | |||
Other Epsomite Information |
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Links to other databases for Epsomite : 1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Athena 4 - EUROmin Project 5 - Ecole des Mines de Paris 6 - Franklin Minerals(Dunn) 7 - GeoScienceWorld 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - MinDAT 13 - Mineral and Gemstone Kingdom 14 - Mineralienatlas (Deutsch) 15 - NSDL Reciprocal Net (JAVA) 16 - Online Mineral Museum 17 - QUT Mineral Atlas 18 - Ruff.Info 19 - WWW-MINCRYST Search for Epsomite using: Visit our Advertisers for Epsomite : Ask about Epsomite here : Print or Cut-and-Paste your Epsomite Specimen Label here :
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