General Welinite-VIII Information![]() (Mn++,Mg)3(W++++++,Mn+++)1-x(SiO4)(O,OH)3 (x=1/3) |
![]() Molecular Weight = 402.69 gm |
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Magnesium 1.21 % Mg 2.00 % MgO |
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Manganese 40.93 % Mn 52.85 % MnO |
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Silicon 6.97 % Si 14.92 % SiO2 |
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Hydrogen 0.25 % H 2.24 % H2O |
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Tungsten 22.83 % W 28.79 % WO3 |
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Oxygen 27.81 % O |
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100.00 % 100.79 % = TOTAL OXIDE |
![]() Mn2+3W0.5Mg0.2SiO6(OH) |
![]() In small amounts, as fillings in fissures with other mineral cutting hausmannite ore. |
![]() Approved IMA 1967 |
![]() Langban, Varmland, Sweden. Link to MinDat.org Location Data. |
![]() Named for Eric Welin, mineralogist and geochronologist, Swedish Museum of Natural History, Stockholm, Sweden. |
![]() Welinite-VIII |
![]() | | Search for Welinite-VIII Images
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| | Welinite-VIII Crystallography![]() a:c = 1:0.58675 |
![]() a = 8.155, c = 4.785, Z = 2; V = 275.59 Den(Calc)= 4.85 |
![]() Trigonal - PyramidalH-M Symbol (3) Space Group: P 3 |
![]() By Intensity(I/Io): 1.782(1), 2.332(0.8), 3.102(0.8), |
| Physical Properties of Welinite-VIII![]() {001} Poor |
![]() Brown, Reddish black. |
![]() 4.47 |
![]() Transparent to Translucent |
![]() Brittle - Generally displayed by glasses and most non-metallic minerals. |
![]() 4 - Fluorite |
![]() Resinous |
![]() pale reddish brown |
| Optical Properties of Welinite-VIII![]() CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.083 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1798,KPDmeas= 0.1951,KC= 0.196 Ncalc = 1.88 - 1.95 ![]() Uniaxial (+), w=1.864, e=1.88, bire=0.0160. |
| Calculated Properties of Welinite-VIII![]() Bulk Density (Electron Density)=4.12 gm/cc |
note: Specific Gravity of Welinite-VIII =4.47 gm/cc. ![]() Fermion Index = 0.03 |
Boson Index = 0.97 ![]() PEWelinite-VIII = 278.78 barns/electron |
U=PEWelinite-VIII x rElectron Density=1,147.45 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Welinite-VIII is Not Radioactive | Welinite-VIII Classification![]() 52.04.01.02 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O |
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(52.04)with cations in [6] and/or > [6] coordination |
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(52.04.01)Welinite group |
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![]() 09.AF.07.5 09 - SILICATES (Germanates) |
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09.A - Nesosilicates |
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09.AF -Nesosilicates with additional anions; |
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| Other Welinite-VIII Information![]() NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
![]() Links to other databases for Welinite-VIII : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Welinite-VIII using: Visit our Advertisers for Welinite-VIII : A Bijoux Google Search for Welinite-VIIIAdam's Minerals Google Search for Welinite-VIII Cape Minerals Google Search for Welinite-VIII Dakota Matrix Minerals Google Search for Welinite-VIII Excalibur Mineral Corp. Google Search for Welinite-VIII Exceptional Minerals Google Search for Welinite-VIII John Betts Fine Minerals Search for Welinite-VIII McDougall Minerals Google Search for Welinite-VIII Mineral News Website Link Rock and Mineral Shows Google Search for Welinite-VIII Weinrich Minerals, Inc. Google Search for Welinite-VIII Ask about Welinite-VIII here : Print or Cut-and-Paste your Welinite-VIII Specimen Label here :
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