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Epsomite Mineral Data + |
General Epsomite Information |
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| MgSO4·7(H2O) | |||
| 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 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Mg(SO4)·7(H2O) | |||
| White efflorescence on cave walls, volcanic exhalations, or deposited by Mg sulfate spring waters. | |||
| Valid Species (Pre-IMA) 1824 | |||
| Lake-bed deposits on Kruger Mountain, Oregon. Link to MinDat.org Location Data. | |||
| The mineral has long been known from the deposits associated with the mineral waters at Epsom, Surrey, England. | |||
| 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 | |||
| a = 11.86, b = 11.99, c = 6.858, Z = 4; V = 975.22 Den(Calc)= 1.68 | |||
| Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 212121 | |||
| By Intensity(I/Io): 4.21(1), 2.677(0.25), 5.35(0.25), | |||
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Physical Properties of Epsomite |
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| [010] Perfect, [101] Distinct | |||
| Colorless, White, Yellowish white, Greenish white, Pinkish white. | |||
| 1.67 - 1.68, Average = 1.67 | |||
| Transparent to translucent | |||
| Brittle - Generally displayed by glasses and most non-metallic minerals. | |||
| Acicular - Occurs as needle-like crystals. | |||
| Encrustations - Forms crust-like aggregates on matrix. | |||
| Fibrous - Crystals made up of fibers. | |||
| 2-2.5 - Gypsum-Finger Nail | |||
| None. | |||
| Vitreous (Glassy) | |||
| Nonmagnetic | |||
| 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 |
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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. | |||
| none. | |||
| none. | |||
| none. | |||
Calculated Properties of Epsomite |
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relectron=1.77 gm/cc |
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| Fermion Index = 0.01118 Boson Index = 0.98882 |
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PEEpsomite = 1.14 barns/electron |
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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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| 29.6.11.1 (29)Hydrated Acid and Sulfates | |||
| (29.6)where A XO4 · x(H2O) | |||
| (29.6.11)Dana Group | |||
| VI/C.07-10 VI - Sulfates,Chromates,Molybdates and Tungstates | |||
| VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium size | |||
| VI/C.07 - Epsomite - Goslarite series | |||
Other Epsomite Information |
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| NAME( Mason68) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68) | |||
| Links to other databases for Epsomite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 - Franklin Minerals(Dunn) 8 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 - Mineral and Gemstone Kingdom 15 -Mineralienatlas (Deutsch) 16 - Minerals of Wisconsin 17 -NSDL Reciprocal Net (JAVA) 18 -QUT Mineral Atlas 19 - WWW-MINCRYST 20 -École des Mines de Paris Search for Epsomite using: Visit our Advertisers for Epsomite : Translate Epsomite Mineral Data : Ask about Epsomite here : Print or Cut-and-Paste your Epsomite Specimen Label here :
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