[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts] See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM] Mineral News was founded some twenty years ago and has developed a following of avid mineral collectors seeking timely information about new finds and other items of interest to the collector community. Articles are solicited from collector and scientific authors. General Keystoneite InformationMg0.5[Ni++Fe++(TeO3)3]•4.5(H2O) |
Molecular Weight = 734.55 gm |
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Magnesium 1.65 % Mg 2.74 % MgO |
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Iron 7.60 % Fe 9.78 % FeO |
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Nickel 7.99 % Ni 10.17 % NiO |
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Tellurium 52.11 % Te 65.18 % TeO2 |
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Hydrogen 1.23 % H 11.04 % H2O |
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Oxygen 29.40 % O |
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______ ______ |
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100.00 % 98.91 % = TOTAL OXIDE |
Mg0.5NiFe2+(TeO3)3•4.5(H2O) |
Secondary mineral in telluride-bearing ores. |
Approved IMA 1988 |
Keystone mine, Magnolia distict, Boulder County, Colorado, USA. Link to MinDat.org Location Data. |
Named for the locality |
Keystoneite + Pronunciation |
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Keystoneite Crystallographya:c = 1:0.8141 |
a = 9.344, c = 7.607, Z = 2; V = 575.19 Den(Calc)= 4.24 |
Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 63/m |
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 KeystoneiteNone |
Golden yellow, Orange yellow. |
4.4 |
Acicular - Occurs as needle-like crystals. |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) |
Adamantine |
| Optical Properties of KeystoneiteCI 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 Uniaxial (+), w=1.99, e=1.85, bire=0.1400. |
| Calculated Properties of KeystoneiteBulk Density (Electron Density)=3.99 gm/cc |
note: Specific Gravity of Keystoneite =4.40 gm/cc. Fermion Index = 0.04 |
Boson Index = 0.96 PEKeystoneite = 182.30 barns/electron |
U=PEKeystoneite x rElectron Density= 727.27 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Keystoneite is Not Radioactive | Keystoneite Classification34.03.02.03 (34)Selenites - Tellurites - Sulfites |
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(34.03)Dana Type |
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(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 |
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04.J - Arsenites, Antimonites, Bismuthites, Sulfites, |
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04.JM -Tellurites without additional anions, with H2O |
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| Other Keystoneite InformationNAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(Dana8) |
Links to other databases for Keystoneite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Keystoneite using: Visit our Advertisers for Keystoneite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Keystoneite Mineral Data : Ask about Keystoneite here : Print or Cut-and-Paste your Keystoneite Specimen Label here :
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