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Monsmedite Mineral Data |
General Monsmedite Information |
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H8K2Tl2(SO4)8•11(H2O) | |
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Molecular Weight = 1,461.70 gm | |
Potassium 5.35 % K 6.44 % K2O | ||
Thallium 27.97 % Tl 31.25 % Tl2O3 | ||
Hydrogen 2.07 % H 18.49 % H2O | ||
Sulfur 17.55 % S 43.82 % SO3 | ||
Oxygen 47.07 % O | ||
______ ______ | ||
100.00 % 100.00 % = TOTAL OXIDE | ||
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H8K2Tl2(SO4)8•11(H2O) | |
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In the oxidation zone of a silver-bearing lead-zinc deposit. Discredited monsmedite=votaite. | |
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Discredited IMA 2002 | |
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Baia Sprie, Baia Mare region, Romania. Link to MinDat.org Location Data. | |
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Named in 1968 from the Latin 'Mons Medius', for Baia Sprie, Romania, the locality for the mineral. | |
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Monsmedite + Pronunciation ![]() |
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Discredited | |
IMA1998-D | ||
Monsmedite Crystallography |
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a = 25.29, Z = 20; V = 16,175.08 Den(Calc)= 3.00 | |
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Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3c | |
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By Intensity(I/Io): 3.4(1), 1.57(0.4), 2.08(0.4),2.32(0.4), 3.56(0.4), 2.86(0.4), 3.06(0.1), 5.49(0.1), | |
Physical Properties of Monsmedite |
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{???} Good, {???} Good | |
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Dark green, Black. | |
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3 | |
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Subopaque | |
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Euhedral Crystals - Occurs as well-formed crystals showing good external form. | |
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2 - Gypsum | |
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Resinous | |
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dark green | |
Optical Properties of Monsmedite |
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CI meas= -0.19 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.19 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2018,KPDmeas= 0.2018,KC= 0.1696 Ncalc = 1.51 |
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Biaxial (-), a=1.6, g=1.611, bire=0.0110 | |
Calculated Properties of Monsmedite |
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Bulk Density (Electron Density)=2.88 gm/cc note: Specific Gravity of Monsmedite =3.00 gm/cc. |
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Fermion Index = 0.0015516873 Boson Index = 0.9984483127 |
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PEMonsmedite = 429.96 barns/electron U=PEMonsmedite x relectron=1,238.97 barns/cc. |
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GRapi = 74.14 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Monsmedite |
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Monsmedite Classification |
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29.01.03.01 (29)Hydrated Acid and Sulfates | |
(29.01)(Hydrated, Acid) | ||
(29.01.03)Dana Group | ||
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07.CC.25 07 - SULFATES (SELENATES, TELLURATES) | |
07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O | ||
07.CC -With medium-sized and large cations | ||
Other Monsmedite Information |
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NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | |
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Links to other databases for Monsmedite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - Ecole des Mines de Paris 4 - GeoScienceWorld 5 - Google Images 6 - Google Scholar 7 - MinDAT 8 - Mineralienatlas (Deutsch) 9 - Online Mineral Museum 10 - QUT Mineral Atlas 11 - Ruff.Info Search for Monsmedite using: Visit our Advertisers for Monsmedite : Ask about Monsmedite here : Print or Cut-and-Paste your Monsmedite Specimen Label here :
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