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Villiaumite Mineral Data
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General Villiaumite Information
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Chemical Formula: |
NaF |
Composition: |
Molecular Weight = 41.99 gm |
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Sodium 54.75 % Na 73.81 % Na2O |
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Fluorine 45.25 % F 45.25 % F |
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- %
F -19.05 % -O=F2 |
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______ ______ |
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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 |
Synonym: |
ICSD 24443 |
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PDF 36-1455 |
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Sodium Fluoride |
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Villiaumite Image |
Images:
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Griceite Villiaumite
Comments: White aggregates of griceite with pinkish villiaumite.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., Québec, Canada.
Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag |
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Images:
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Images:
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Aplowite Villiaumite
Comments: Pink aplowite laths intergrown with lustrous, red, massive villiaumite.
Location: Mt Rasvumchorr, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.
Scale: 20x19x18 mm.
© John Betts - Fine Minerals |
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Images:
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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 - Hexoctahedral H-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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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 |
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Optical Properties of Villiaumite
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Optical Data: |
Isotropic, n=1.33. |
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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. |
Fermion Index: |
Fermion Index = 0 Boson Index = 1 |
Photoelectric: |
PEVilliaumite = 1.08 barns/electron U=PEVilliaumite x rElectron Density= 2.89 barns/cc. |
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 |
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(09.01)where A X |
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(09.01.01)Halite Group |
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09.01.01.01 Halite NaCl F m3m 4/m 3 2/m |
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09.01.01.02 Sylvite KCl F m3m 4/m 3 2/m |
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09.01.01.03 Villiaumite NaF F m3m 4/m 3 2/m |
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09.01.01.04 Carobbiite KF F m3m 4/m 3 2/m |
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09.01.01.05 Griceite LiF F m3m 4/m 3 2/m |
Strunz Class: |
03.AA.20 03 - HALIDES |
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03.A - Simple Halides, Without H2O |
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03.AA -M:X = 1:1, 2:3, 3:5, etc. |
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03.AA.20 Carobbiite KF F m3m 4/m 3 2/m |
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03.AA.20 Griceite LiF F m3m 4/m 3 2/m |
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03.AA.20 Halite NaCl F m3m 4/m 3 2/m |
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03.AA.20 Sylvite KCl F m3m 4/m 3 2/m |
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03.AA.20 Villiaumite NaF F m3m 4/m 3 2/m |
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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
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Print or Cut-and-Paste your Villiaumite Specimen Label here :
Villiaumite
NaF
Dana No: 09.01.01.03 Strunz No: 03.AA.20
Locality:
Notes:
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