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Keystoneite Mineral Data |
General Keystoneite Information |
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Mg0.5[Ni++Fe++(TeO3)3]•4.5(H2O) | ||
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Molecular Weight = 734.55 gm | ||
Magnesium 1.65 % Mg 2.74 % MgO | |||
Iron 7.60 % Fe 9.78 % FeO | |||
Nickel 7.99 % Ni 10.17 % NiO | |||
Tellurium 52.11 % Te 65.18 % TeO2 | |||
Hydrogen 1.23 % H 11.04 % H2O | |||
Oxygen 29.40 % O | |||
______ ______ | |||
100.00 % 98.91 % = TOTAL OXIDE | |||
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Mg0.5NiFe2+(TeO3)3•4.5(H2O) | ||
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Secondary mineral in telluride-bearing ores. | ||
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Approved IMA 1988 | ||
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Keystone mine, Magnolia distict, Boulder County, Colorado, USA. Link to MinDat.org Location Data. | ||
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Named for the locality | ||
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Keystoneite + Pronunciation ![]() |
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Keystoneite Image | |||
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Keystoneite Crystallography |
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a:c = 1:0.8141 | ||
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a = 9.344, c = 7.607, Z = 2; V = 575.19 Den(Calc)= 4.24 | ||
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Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63/m | ||
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By Intensity(I/Io): 2.77(1), 8.12(0.9), 4.05(0.8),1.72(0.6), 1.498(0.5), 2.84(0.5), 2.95(0.5), 3.81(0.4), | ||
Physical Properties of Keystoneite |
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None | ||
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Golden yellow, Orange yellow. | ||
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4.4 | ||
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Acicular - Occurs as needle-like crystals. | ||
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Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
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Adamantine | ||
Optical Properties of Keystoneite |
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CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.032 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.217,KPDmeas= 0.2091,KC= 0.2103 Ncalc = 1.89 - 1.93 |
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Uniaxial (+), w=1.99, e=1.85, bire=0.1400. | ||
Calculated Properties of Keystoneite |
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Bulk Density (Electron Density)=3.99 gm/cc note: Specific Gravity of Keystoneite =4.40 gm/cc. |
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Fermion Index = 0.04 Boson Index = 0.96 |
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PEKeystoneite = 182.30 barns/electron U=PEKeystoneite x rElectron Density= 727.27 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Keystoneite is Not Radioactive |
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Keystoneite Classification |
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34.03.02.03 (34)Selenites - Tellurites - Sulfites | ||
(34.03)Dana Type | |||
(34.03.02)Zemannite Group | |||
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04.JM.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate | ||
04.J - Arsenites, Antimonites, Bismuthites, Sulfites, | |||
04.JM -Tellurites without additional anions, with H2O | |||
Other Keystoneite Information |
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NAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(Dana8) | ||
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Links to other databases for Keystoneite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Keystoneite using: Visit our Advertisers for Keystoneite : Ask about Keystoneite here : Print or Cut-and-Paste your Keystoneite Specimen Label here :
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