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Werdingite Mineral Data |
General Werdingite Information |
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(Mg,Fe)2Al14B4Si4O37 | ||
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Molecular Weight = 1,209.06 gm | ||
Magnesium 2.81 % Mg 4.67 % MgO | |||
Aluminum 31.69 % Al 59.87 % Al2O3 | |||
Iron 4.16 % Fe 5.35 % FeO | |||
Silicon 9.29 % Si 19.88 % SiO2 | |||
Boron 3.22 % B 10.36 % B2O3 | |||
Oxygen 48.83 % O | |||
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100.00 % 100.13 % = TOTAL OXIDE | |||
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Mg1.4Fe2+0.9Al14.2B3.6Si4O36.9 | ||
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Granitic pegmatites cutting granulite-facies metapelitic rocks | ||
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Approved IMA 1990 | ||
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Cap Andrahomana, near Fort Dauphin, southeastern Madagascar (type locality of grandidierite), and at Almgjotheii, in the aureole of the Rogaland anorthosite complex, southwestern Norwa Link to MinDat.org Location Data. | ||
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Named for Gunter Werding, of the Mineralogical Institute, Ruhr University, Bochum, Germany. | ||
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Werdingite + Pronunciation ![]() |
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ICSD 69604 | ||
IMA1988-023 | |||
PDF 46-1359 | |||
Werdingite Image | |||
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Werdingite Crystallography |
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a:b:c =0.9807:1:1.3991 | ||
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a = 7.995, b = 8.152, c = 11.406, Z = 1; alpha = 110.45°, beta = 110.85°, gamma = 84.66° V = 648.10 Den(Calc)= 3.10 | ||
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Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1 | ||
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By Intensity(I/Io): 5.23(1), 5.43(0.8), 4.98(0.75), | ||
Physical Properties of Werdingite |
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{???} Indistinct | ||
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Brownish yellow. | ||
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3.04 | ||
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Translucent | ||
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Anhedral Grains - Granular minerals without the expression of crystal shapes | ||
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7 - Quartz | ||
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Vitreous (Glassy) | ||
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white | ||
Optical Properties of Werdingite |
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CI meas= -0.012 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2061,KPDmeas= 0.2095,KC= 0.207 Ncalc = 1.63 - 1.64 |
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Biaxial (-), a=1.614, b=1.646, g=1.651, bire=0.0370, 2V(Calc)=42, 2V(Meas)=33-42. Dispersion r > v moderately strong. | ||
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colorless. | ||
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yellow. | ||
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colorless. | ||
Calculated Properties of Werdingite |
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Bulk Density (Electron Density)=3.04 gm/cc note: Specific Gravity of Werdingite =3.09 gm/cc. |
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Fermion Index = 0.01 Boson Index = 0.99 |
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PEWerdingite = 2.61 barns/electron U=PEWerdingite x rElectron Density= 7.93 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Werdingite is Not Radioactive |
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Werdingite Classification |
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56.03.02.01 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O | ||
(56.03)with [Si2O7] with borate groups | |||
(56.03.02)Dana Group | |||
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09.BD.35 09 - SILICATES (Germanates) | ||
09.B - Sorosilicates | |||
09.BD -Si2O7 groups with additional anions; | |||
Other Werdingite Information |
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NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.75,p415-420,1990) OPTIC PROP.(AntBidBlaNic2) | ||
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Links to other databases for Werdingite : 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 15 - WWW-MINCRYST Search for Werdingite using: Visit our Advertisers for Werdingite : Ask about Werdingite here : Print or Cut-and-Paste your Werdingite Specimen Label here :
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