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General Villiaumite Information |
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 Chemical Formula: |
NaF | ||
| Composition: |
Molecular Weight = 41.99 gm | ||
| Sodium 54.75 % Na 73.81 % Na2O | |||
| Fluorine 45.25 % F 45.25 % F | |||
| - % F -19.05 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
NaF | ||
| Environment: |
In nepheline-syenite composition rocks. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1908 | ||
| Locality: |
Islands of Los, French Guina. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named after the French traveller, Villium. | ||
| Name Pronunciation: |
Villiaumite + Pronunciation  |
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| Synonym: |
ICSD 24443 | ||
| PDF 36-1455 | |||
| Sodium Fluoride | |||
Villiaumite Image | |||
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Villiaumite Crystallography |
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| Cell Dimensions: |
a = 4.631, Z = 4; V = 99.32 Den(Calc)= 2.81 | ||
| Crystal System: |
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.319(1), 1.639(0.6), 1.338(0.17), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Villiaumite |
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| Cleavage: |
{100} Perfect, {010} Perfect, {001} Perfect | ||
| Color: |
Colorless, Dark red, Orange brown, Pink. | ||
| Density: |
2.79 - 2.8, Average = 2.79 | ||
| Diaphaneity: |
Transparent | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. | ||
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. | ||
| Hardness: |
2.5 - Finger Nail | ||
| Luminescence: |
Fluorescent, Short UV=red. | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
pinkish white | ||
Optical Properties of Villiaumite |
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| Optical Data: |
Isotropic, n=1.33. | ||
Calculated Properties of Villiaumite |
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| Electron Density: |
Bulk Density (Electron Density)=2.68 gm/cc note: Specific Gravity of Villiaumite =2.81 gm/cc. |
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| Fermion Index: |
Fermion Index = 0 Boson Index = 1 |
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| Photoelectric: |
PEVilliaumite = 1.08 barns/electron U=PEVilliaumite x rElectron Density= 2.89 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Villiaumite is Not Radioactive |
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Villiaumite Classification |
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| Dana Class: |
09.01.01.03 (09)Anhydrous and Hydrated Halides | ||
| (09.01)where A X | |||
| (09.01.01)Halite Group | |||
| Strunz Class: |
03.AA.20 03 - HALIDES | ||
| 03.A - Simple Halides, Without H2O | |||
| 03.AA -M:X = 1:1, 2:3, 3:5, etc. | |||
Other Villiaumite Information |
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| References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;www.saint-hilaire.ca) OPTIC PROP.(Ford32) | ||
| See Also: |
Links to other databases for Villiaumite : 1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 - Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Athena 6 - CalTech Mineral Spectroscopy 7 - EUROmin Project 8 - Ecole des Mines de Paris 9 - GeoScienceWorld 10 - Google Images 11 - Google Scholar 12 - Handbook of Mineralogy (MinSocAm) 13 - Handbook of Mineralogy (UofA) 14 - MinDAT 15 - Mineralienatlas (Deutsch) 16 - Online Mineral Museum 17 - QUT Mineral Atlas 18 - Ruff.Info 19 - WWW-MINCRYST Search for Villiaumite using: Visit our Advertisers for Villiaumite : A Bijoux Google Search for VilliaumiteAdam's Minerals Google Search for Villiaumite Cape Minerals Google Search for Villiaumite Dakota Matrix Minerals Google Search for Villiaumite Excalibur Mineral Corp. Google Search for Villiaumite Exceptional Minerals Google Search for Villiaumite John Betts Fine Minerals Search for Villiaumite McDougall Minerals Google Search for Villiaumite Mineral News Website Link Rock and Mineral Shows Google Search for Villiaumite Weinrich Minerals, Inc. Google Search for Villiaumite Ask about Villiaumite here : Print or Cut-and-Paste your Villiaumite Specimen Label here :
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