[Mineral Galleries] [About Me] [e-Bay Items] [Latest News] [How to Order] A Diverse Selection of Beautifully Unique Gem & Mineral Specimens Desert Winds Gems & Minerals • For All Levels of Collectors Worldwide Aesthetic & Rare Mineral Specimens • Regular Updates General Johninnesite InformationNa2Mg4Mn++12(AsO4)2(Si12O35)(OH)6 |
Molecular Weight = 2,079.34 gm |
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Sodium 2.21 % Na 2.98 % Na2O |
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Magnesium 4.68 % Mg 7.75 % MgO |
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Manganese 31.71 % Mn 40.94 % MnO |
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Silicon 16.21 % Si 34.67 % SiO2 |
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Arsenic 7.21 % As 11.05 % As2O5 |
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Hydrogen 0.29 % H 2.60 % H2O |
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Oxygen 37.70 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Na2Mg4Mn2+12(AsO4)2Si12O35(OH)6 |
In low temperature hydrothermal veins cutting metamophosed Fe-Mn ores. |
Approved IMA 1986 |
Kombat mine, located 37 km east of Otavi and 49 km south of Tsumeb in the north-central part of Namibia. Link to MinDat.org Location Data. |
Named for John Innes, mineralogist of the Tsumeb Corporation, for his contributions to the mineralogy of the Tsumeb and Kombat mines. |
Johninnesite + Pronunciation |
ICSD 75306 |
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PDF 39-402 |
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Johninnesite Crystallographya:b:c =0.9435:1:0.8694 |
a = 10.44, b = 11.065, c = 9.62, Z = 1; alpha = 107.43°, beta = 82.7°, gamma = 111.6° V = 977.82 Den(Calc)= 3.53 |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 |
By Intensity(I/Io): 2.676(1), 3.23(0.6), 9.8(0.6), |
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Mouse
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| Physical Properties of Johninnesite{100} Good, {010} Poor |
Yellow brown. |
3.48 |
Transparent |
Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments. |
Fibrous - Crystals made up of fibers. |
Plumose - "Mica-like" minerals forming aggregates of plume-like forms. |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) |
5-6 - Between Apatite and Orthoclase |
Vitreous (Glassy) |
brownish yellow |
| Optical Properties of JohninnesiteCI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1972,KPDmeas= 0.1984,KC= 0.2007 Ncalc = 1.7 Biaxial (-), a=1.6742, b=1.6968, g=1.6999, bire=0.0257, 2V(Calc)=40, 2V(Meas)=41.9. Dispersion r > v distinct. |
| Calculated Properties of JohninnesiteBulk Density (Electron Density)=3.35 gm/cc |
note: Specific Gravity of Johninnesite =3.48 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEJohninnesite = 13.75 barns/electron |
U=PEJohninnesite x rElectron Density= 46.11 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Johninnesite is Not Radioactive | Johninnesite Classification69.02.05.01 (69)Inosilicate Chains with Side Branches or Loops |
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(69.02)with P>2 |
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(69.02.05)Dana Group |
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09.DH.70 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DH -Inosilicates with 4-periodic single chains, Si4O12 |
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| Other Johninnesite InformationNAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2) |
Links to other databases for Johninnesite : |
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 15 - WWW-MINCRYST Search for Johninnesite using: Visit our Advertisers for Johninnesite : 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 Johninnesite Mineral Data : Ask about Johninnesite here : Print or Cut-and-Paste your Johninnesite Specimen Label here :
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