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Loudounite Mineral Data |
General Loudounite Information |
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NaCa5Zr4Si16O40(OH)11•8(H2O) | ||
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Molecular Weight = 2,008.82 gm | ||
Sodium 1.14 % Na 1.54 % Na2O | |||
Calcium 9.98 % Ca 13.96 % CaO | |||
Zirconium 18.16 % Zr 24.54 % ZrO2 | |||
Silicon 22.37 % Si 47.86 % SiO2 | |||
Hydrogen 1.35 % H 12.11 % H2O | |||
Oxygen 46.99 % O | |||
______ ______ | |||
100.00 % 100.00 % = TOTAL OXIDE | |||
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NaCa5Zr4Si16O40(OH)11•8(H2O) | ||
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In a diabase. | ||
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Approved IMA 1983 | ||
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Goose Creek Quarry, Loudoun Co., Virginia, USA. Link to MinDat.org Location Data. | ||
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Named for the locality. | ||
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Loudounite + Pronunciation ![]() |
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Loudounite Image | |||
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Loudounite Crystallography |
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Monoclinic | ||
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By Intensity(I/Io): 2.931(1), 4.06(0.7), 7.37(0.6), | ||
Physical Properties of Loudounite |
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Colorless, Green, White, Light green. | ||
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2.48 | ||
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Translucent | ||
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Fibrous - Crystals made up of fibers. | ||
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Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
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Spherical - Spherical, rounded aggregates. | ||
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5 - Apatite | ||
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Non-fluorescent. | ||
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white | ||
Optical Properties of Loudounite |
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CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC) KPDmeas= 0.219,KC= 0.2247 Ncalc = 1.56 |
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Biaxial (?), a=1.536, g=1.55, bire=0.0140 | ||
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none. | ||
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none. | ||
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none. | ||
Calculated Properties of Loudounite |
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Bulk Density (Electron Density)=2.45 gm/cc note: Specific Gravity of Loudounite =2.48 gm/cc. |
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Fermion Index = 0.03 Boson Index = 0.97 |
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PELoudounite = 25.75 barns/electron U=PELoudounite x rElectron Density= 63.20 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Loudounite is Not Radioactive |
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Loudounite Classification |
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59.02.02.05 (59)Cyclosilicate Three-Membered Rings | ||
(59.02)hydrated | |||
(59.02.02)Catapleiite group | |||
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09.HF.10 09 - SILICATES (Germanates) | ||
09.H - Unclassified Silicates | |||
09.HF -With Nb, Ta, Zr | |||
Other Loudounite Information |
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NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
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Links to other databases for Loudounite : 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 Search for Loudounite using: Visit our Advertisers for Loudounite : Ask about Loudounite here : Print or Cut-and-Paste your Loudounite Specimen Label here :
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