Loudounite Mineral Data + 
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- 59.2.2.1 Catapleiite (Na,Ca,[])2ZrSi3O9·2(H2O) B2/b (pseudo-HEX) 2/m
- 59.2.2.2 Calcium-catapleiite (Ca,[])ZrSi3O9·2(H2O) Pbnn 2/m 2/m 2/m
- 59.2.2.3 Gaidonnayite Na2ZrSi3O9·2(H2O) P 21nb mm2
- 59.2.2.4 Georgechaoite KNaZrSi3O9·2(H2O) P 21nb mm2
- 59.2.2.5 Loudounite NaCa5Zr4Si16O40(OH)11·8(H2O) Mono
- 59.2.2.6 Bobtraillite! Na15Sr12Zr14Si42B6O138(OH)6·12(H2O) P 63cm 6mm
- VIII/G.09-05 Altisite Na3K6Ti2Al2Si8O26Cl3 C 2/m 2/m
- VIII/G.09-08 Natrolemoynite! Na4Zr2Si10O26·9(H2O) C 2/m 2/m
- VIII/G.09-10 Lemoynite (Na,K)2CaZr2Si10O26·5-6(H2O) C 2/m 2/m
- VIII/G.09-20 Loudounite NaCa5Zr4Si16O40(OH)11·8(H2O) Mono
General Loudounite Information |
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 Chemical Formula: |
NaCa5Zr4Si16O40(OH)11·8(H2O) | ||
| Composition: |
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 | |||
| Empirical Formula: |
NaCa5Zr4Si16O40(OH)11·8(H2O) | ||
| Environment: |
In a diabase. | ||
| IMA Status: |
Approved IMA 1983 | ||
| Locality: |
Goose Creek Quarry, Loudoun Co., Virginia, USA. Link to MinDat.org Location Data. | ||
| Name Origin: |
After the locality. | ||
Search for Loudounite Images | |||
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Images:
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Loudounite Crystallography |
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| Crystal System: |
Monoclinic | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.931(1), 4.06(0.7), 7.37(0.6), | ||
Physical Properties of Loudounite |
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| Color: |
Colorless, Green, White, Light green. | ||
| Density: |
2.48 | ||
| Diaphaniety: |
Translucent | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
| Habit: |
Spherical - Spherical, rounded aggregates. | ||
| Hardness: |
5 - Apatite | ||
| Luminescence: |
Non-fluorescent. | ||
| Streak: |
white | ||
Optical Properties of Loudounite |
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| Gladstone-Dale: |
CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC) KPDmeas= 0.219,KC= 0.2247 |
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| Optical Data: |
Biaxial (?), a=1.536, g=1.55, bire=0.0140 | ||
| Pleochroism (x): |
none. | ||
| Pleochroism (y): |
none. | ||
| Pleochroism (z): |
none. | ||
Calculated Properties of Loudounite |
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| Electron Density: |
relectron=2.45 gm/cc |
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| Fermion Index |
Fermion Index = 0.03118 Boson Index = 0.96882 |
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| Photoelectric: |
PELoudounite = 25.75 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Loudounite is Not Radioactive |
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Loudounite Classification |
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| Dana Class: |
59.2.2.5 (59)Cyclosilicate Three-Membered Rings | ||
| (59.2)hydrated | |||
| (59.2.2)Catapleiite group | |||
| Strunz Class: |
VIII/G.09-20 VIII - Silicates | ||
| VIII/G - Intermediate between chain- and layered silicates | |||
| VIII/G.09 - Lemoynite - Loudounite series | |||
Other Loudounite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Loudounite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Loudounite using: Visit our Advertisers for Loudounite : AA Mineral SpecimensB & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Loudounite Mineral Data : Ask about Loudounite here : Print or Cut-and-Paste your Loudounite Specimen Label here :
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