Villiaumite Mineral Data

[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.

General Villiaumite Information

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

Synonym:

ICSD 24443

PDF 36-1455

Sodium Fluoride

Villiaumite Image

Images:

Villiaumite Griceite

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

Images:

Villiaumite Naujakasite

Comments: Greenish-gray crystals of naujakasite with red villiaumite.
Location: Narsaq river, Kvanefjeld Mt., Ilímaussaq massif, Greenland. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Villiaumite Aplowite

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

Images:

Villiaumite

Comments: Nearly opaque crystalline villiaumite cleavage.
Location: Mount Kukisvumchorr, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Villiaumite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.319(1), 1.639(0.6), 1.338(0.17),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Deshpande V T , Acta Crystallographica , 14 (1961) p.794-794, Thermal expansion of sodium fluoride and sodium bromide, Note: T = 29.6 C, rocksalt structure

View Additional jPOWD Structure files for Villiaumite
[1] [2] [3] [4] [5] [6] [7]

Physical Properties of Villiaumite

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

Optical Data:

Isotropic, n=1.33.

Calculated Properties of Villiaumite

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:

PE_Villiaumite= 1.08 barns/electron
U=PE_Villiaumite x rElectron Density= 2.89 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Villiaumite is Not Radioactive

Villiaumite Classification

Dana Class:

09.01.01.03 (09)Anhydrous and Hydrated Halides

(09.01)where A X

(09.01.01)Halite Group

09.01.01.01 Halite NaCl F m3m 4/m 3 2/m

09.01.01.02 Sylvite KCl F m3m 4/m 3 2/m

09.01.01.03 Villiaumite NaF F m3m 4/m 3 2/m

09.01.01.04 Carobbiite KF F m3m 4/m 3 2/m

09.01.01.05 Griceite LiF F m3m 4/m 3 2/m

Strunz Class:

03.AA.20 03 - HALIDES

03.A - Simple Halides, Without H2O

03.AA -M:X = 1:1, 2:3, 3:5, etc.

03.AA.20 Carobbiite KF F m3m 4/m 3 2/m

03.AA.20 Griceite LiF F m3m 4/m 3 2/m

03.AA.20 Halite NaCl F m3m 4/m 3 2/m

03.AA.20 Sylvite KCl F m3m 4/m 3 2/m

03.AA.20 Villiaumite NaF F m3m 4/m 3 2/m

Other Villiaumite Information

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:

[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Villiaumite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Villiaumite Mineral Data :

Ask about Villiaumite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: