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Ferroholmquistite Mineral Data |
General Ferroholmquistite Information |
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[ ](Li2Fe++3Al2)Si8O22(OH)2 | ||
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Molecular Weight = 808.43 gm | ||
Potassium 0.05 % K 0.06 % K2O | |||
Sodium 0.11 % Na 0.15 % Na2O | |||
Lithium 1.61 % Li 3.47 % Li2O | |||
Magnesium 4.42 % Mg 7.33 % MgO | |||
Manganese 0.14 % Mn 0.18 % MnO | |||
Aluminum 6.31 % Al 11.92 % Al2O3 | |||
Iron 11.81 % Fe 15.20 % FeO | |||
Silicon 27.79 % Si 59.46 % SiO2 | |||
Hydrogen 0.25 % H 2.20 % H2O | |||
Oxygen 47.44 % O | |||
Fluorine 0.07 % F 0.07 % F | |||
- % F -0.03 % -O=F2 | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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K0.01Na0.01Li1.88Mg0.08Na0.03Fe2+0.01Al1.89Fe2+1.7Mg1.39Mn2+0.02Si8O22(OH)1.97F0.03 | ||
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Metasomatism around highly fractionated lithium-rich pegmatites that intrude amphibolites. | ||
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Approved IMA 1978 | ||
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Greenbushes pegmatite (Western Australia). Link to MinDat.org Location Data. | ||
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The name reflects its composition and relationship to holmquistite.. | ||
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Ferroholmquistite + Pronunciation ![]() |
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IMA2004-030 | ||
Ferroholmquistite Image | |||
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Ferroholmquistite Crystallography |
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a:b:c =1.0338:1:0.2994 | ||
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a = 18.3, b = 17.7, c = 5.3, Z = 4; V = 1,716.72 Den(Calc)= 3.13 | ||
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Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma | ||
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By Intensity(I/Io): 8.11(1), 3(0.48), 4.42(0.26),2.797(0.17), 2.648(0.14), 3.62(0.13), 2.536(0.11), | ||
Physical Properties of Ferroholmquistite |
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{010} Good, {101} Good | ||
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Black, Bluish violet. | ||
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Subtranslucent | ||
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Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
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Acicular - Occurs as needle-like crystals. | ||
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Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | ||
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5-6 - Between Apatite and Orthoclase | ||
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Vitreous (Glassy) | ||
Optical Properties of Ferroholmquistite |
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CI calc= 0.026 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.205,KC= 0.2105 Ncalc = 1.66 |
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Biaxial (-), a=1.628, b=1.646, g=1.651, bire=0.0230 | ||
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colorless. | ||
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pale violet-blue. | ||
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blue to deep violet. | ||
Calculated Properties of Ferroholmquistite |
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Bulk Density (Electron Density)=3.09 gm/cc note: Specific Gravity of Ferroholmquistite =3.13 gm/cc. |
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Fermion Index = 0.02 Boson Index = 0.98 |
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PEFerroholmquistite = 4.89 barns/electron U=PEFerroholmquistite x relectron= 15.12 barns/cc. |
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GRapi = 0.71 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Ferroholmquistite |
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Ferroholmquistite Classification |
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66.01.02.11 (66)Inosilicate Double-Width Unbranched Chains, W=2 | ||
(66.01)with P=2 amphibole configuration | |||
(66.01.02)Dana Group | |||
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09.DE.05 09 - SILICATES (Germanates) | ||
09.D - Inosilicates* Structural terminology according to Liebau (1985) | |||
09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family | |||
Other Ferroholmquistite Information |
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NAME( AmMin v90, no7, p1167) PHYS. PROP.(AmMin v90, no7, p1167) OPTIC PROP.(AmMin v90, no7, p1167) | ||
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Links to other databases for Ferroholmquistite : 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 - MinDAT 9 - Mineralienatlas (Deutsch) 10 - Online Mineral Museum 11 - QUT Mineral Atlas 12 - Ruff.Info Search for Ferroholmquistite using: Visit our Advertisers for Ferroholmquistite : Ask about Ferroholmquistite here : Print or Cut-and-Paste your Ferroholmquistite Specimen Label here :
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