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Villiaumite

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Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek District, Khomas Region, Namibia
© Chinellato Matteo

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Formula:
NaF
System:IsometricColour:Dark carmine-red, dark ...
Hardness:2 - 2½
Name:Named after Maxime Villiaume, French explorer and officer in the colonial artillery corps stationed in northern Madagascar, for his help in the acquisition of mineral and rock collections from Madagascar and Guinea. The species was first found in his collection.


Halite Group


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Classification of Villiaumite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:3/A.02-10
Strunz 9th edition ID:3.AA.
Nickel-Strunz 10th (pending) edition ID:3.AA.20

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
Dana 8th edition ID:9.1.1.3

9 : NORMAL HALIDES
1 : AX
Hey's CIM Ref.:8.1.2

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
1 : Halides of the alkali metals and ammonium
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Type Occurrence of Villiaumite

Type Locality:Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea
Year of Discovery:1908
Geological Setting of type material:Small miarolytic cavities in nepheline syenite.

Occurrences of Villiaumite

Geological Setting:Alkalic rocks.

Physical Properties of Villiaumite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Dark carmine-red, dark red, light orange, pink
Streak:White
Hardness (Mohs):2 - 2½
Tenacity:Brittle
Cleavage:Perfect
On {001}.
Parting:Translation gliding with T{011, t[011], and probably also T{001}, t[011].
Density (measured):2.79 g/cm3
Density (calculated):2.81 g/cm3

Crystallography of Villiaumite

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3m {F41/d 3 2/m}
Cell Parameters:a = 4.63Å
Unit Cell Volume:V 99.25 ų (Calculated from Unit Cell)
Morphology:Massive, granular.

Optical Data of Villiaumite

Type:Isotropic
Pleochroism:Strong
Comments:E = yellow
O = pink to deep carmine
Comments:Weak anomalous birefringence.

Chemical Properties of Villiaumite

Formula:
NaF
Essential elements:F, Na
All elements listed in formula:F, Na
CAS Registry number:7681-49-4

CAS Registry numbers are published by the American Chemical Society
Analytical Data:Slightly water soluble.
Relationship of Villiaumite to other Species
Related Minerals - Nickel-Strunz Grouping):

- + 
3.AA.05Marshite
CuI
3.AA.05Miersite
(Ag,Cu)I
3.AA.05Nantokite
CuCl
3.AA.05UM1999-11:I:CuS
Cu(I,S)
3.AA.10Iodargyrite
AgI
3.AA.10Tocornalite
(Ag,Hg)I
3.AA.15Bromargyrite
AgBr
3.AA.15Chlorargyrite
AgCl
3.AA.20Carobbiite
KF
3.AA.20Griceite
LiF
3.AA.20Halite
NaCl
3.AA.20Sylvite
KCl
3.AA.25Salammoniac
NH
 
4
Cl
3.AA.25UM1998-03-Cl:Tl
TlCl
3.AA.25Lafossaite
Tl(Cl,Br)
3.AA.30Calomel
(Hg
+
2
)Cl
 
2
3.AA.30Kuzminite
(Hg
+
2
)(Br,Cl)
 
2
3.AA.30Moschelite
(Hg
+
2
)I
 
2
3.AA.35Neighborite
NaMgF
 
3
3.AA.40Chlorocalcite
KCaCl
 
3
3.AA.45Kolarite
PbTeCl
 
2
3.AA.50Radhakrishnaite
PbTe
 
3
(Cl,S)
 
2
3.AA.55Challacolloite
KPb
 
2
Cl
 
5
3.AA.60Hephaistosite
TlPb
 
2
Cl
 
5
Related Minerals - Hey's Index Grouping:

- + 
8.1.1Griceite
LiF
8.1.3Halite
NaCl
8.1.4Hydrohalite
NaCl · 2H
 
2
O
8.1.5Carobbiite
KF
8.1.6Sylvite
KCl
8.1.7Salammoniac
NH
 
4
Cl
Other Names for Villiaumite
Other Languages:
German:Villiaumit
Russian:Виллиомит
Spanish:Villiaumita
Other Information
Fluorescence in UV light:None.
Thermal Behaviour:Becomes colourless and isotropic whe heated to 300°.
Other Information:Soluble in water.
Health Warning:Poisonous! May be fatal if swallowed or inhaled. Affects respiratory system, heart, skeleton, circulatory system, central nervous system and kidneys. Causes irritation to skin, eyes and respiratory tract. Irritation effects may be delayed.



See MSDS Ref. S3722
External LinksSearch for toxicity information at the United States National Library of Medicine
References for Villiaumite
Reference List:

- + 
LACROIX, A. (1908) Sur l'existance du fluorure de sodium cristallisé comme èlèment des syènites nèphèliniques des Îles de Los. Comptes Rendu, Academie des Sciences, Paris. 146, No.5. 213 216.

STORMER, J.C., and CARMICHAEL, I.S.E. (1970) Villiaumite and the occurrence of fluoride minerals in igneous rocks. American Mineralogist, 55, 126-134.

PETERSEN, O. V. (1981) The first natural crystal of NaF, villiaumite. Neues Jahrbuch für Mineralogie, Monatshefte, Jg. 1981, H. 3, 111-113.

HORVÁTH, L., and GAULT, R.G. (1990) The mineralogy of Mont Saint Hilaire. Mineralogical Record, 21, 284 359.



Davey (1921) Physical Review, a Journal of Experimental and Theoretical Physics: 

Davey (1923) Physical Review, a Journal of Experimental and Theoretical Physics: 21: 143.

Barth and Lunde (1927) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 57.




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    • Localities for Villiaumite
    






    


    

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality. 
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    (TL) indicates type locality.  ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.

    Brazil
     
    

    • Minas Gerais
    

      • Poços de Caldas plateau
    

        • Poços de Caldas alkaline complex
    
    		ELLERT, R. (1969) Nota sobre a ocorrencia de villiaumita do maciço de Poços de Caldas, M.G. [The occurrence of villiaumite in the Poços de Caldas massif, M.G.] Mineração e Metalurgia, 49, No. 294, 234. (in Portuguese)


    Canada
     
    

    • Québec
    

      • Montérégie
    

        • Lajemmerais RCM
    

          • Varennes & St-Amable
    

            • Saint-Amable sill
    
    		Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118.
    



        • Rouville RCM
    

          • Mont Saint-Hilaire
    
    		Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
    Greenland
     
    

    • Kitaa Province (West Greenland)
    

      • Narsaq
    

        • Ilimaussaq complex
    

          • Kuannersuit plateau (Kvanefjeld)
    

            • Kvanefjeld Uranium deposit
    
    		-	Petersen, O., Khomyakov, A., Soerensen, H. (2001): Natrophosphate from the Ilimaussaq alkaline complex South Greenland, South Greenland, Geology of Greenland Survey Bulletin, 190, 139-141
    





Khomyakov, A., Soerensen, H. (2001): Zoning in Steenstrupine-(Ce) from the Ilimaussaq alkaline complex, South Greenland, Geology of Greenland Survey Bulletin 190, 109-118
    





Petersen, O. V.; Rønsbo, J.G. & Leonardsen, E.S. (1989): Nacareniobsite-(Ce), a new mineral species from the Ilímaussaq alkaline complex, South Greenland, and its relation to mosandrite and the rinkite series. Neues Jahrbuch für Mineralogie, Monatshefte 2, 84-96
    






Peterson, O., Johnson, O. Leonardsen, E., Roensbo, J. (1984): Kvanefjeldite a new mineral species from the Ilimaussaq alkaline complex, South West Greenland, Canadian Mineralogist, Vol. 22, 465-467
    Guinea
     
    

    • Los Archipelago (Los Islands)
    

    

LACROIX, A. (1908) Sur l'existance du fluorure de sodium cristallisé comme èlèment des syènites nèphèliniques des Îles de Los. Comptes Rendu, Academie des Sciences, Paris. 146, No.5. 213 216.

    Kenya
     
    

    • Rift Valley Province
    

      • South Rift Valley
    
    		Nielsen, Joan M. (1999): East African magadi (trona): fluoride concentration and mineralogical composition. Journal of African Earth Sciences 29, 423-428.
    Namibia
     
    

    • Khomas Region
    

      • Windhoek District
    

        • Aris
    
    		von Knorring, O., Petersen, O. V. Karup-Moeller, S., Leonardsen, E. S. and Condliffe, E. (1992): Tuperssuatsiaite, from Aris phonolite, Windhoek, Namibia. Neues Jahrbuch für Mineralogie Monatsh., 1992, 145-152; Petersen, O.V., Fockenberg, T., Toft, P.C. & Rattay, M. (1997): Natrophosphate from the Aris phonolites, Windhoek, Namibia. Neues Jahrbuch für Mineralogie, Monatshefte 1997, 511-517. ; [http://www.koeln.netsurf.de/~w.steffens/aris.htm]
    Norway
     
    

    • Telemark
    

      • Nome
    
    		Neumann, H. (1985): Norges Mineraler. Norges geologiske Undersøkelse Skrifter 68 p. 48
    Russia
     
    

    • Northern Region
    

      • Murmanskaja Oblast'
    

        • Kola Peninsula
    

          • Khibiny Massif
    
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    




[World of Stones 95:5-6, p64]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; 33 IGC excursion No 47, July 22 – August 2, 2008 Stop 2-2; American Mineralogist, Volume 94, pages 1450–1458, 2009
    





            • Kukisvumchorr Mt
    
    		[World of Stones 95:5-6, p64]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    




ZVMO 135(1),38-48(2006)
    




Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    




Am Min 79:1011; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    





Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    





Sokolova et al (2005) New Data on Minerals Vol 40 pp115-118
    




Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    





    




Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    





Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    




Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    





Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    




          • Lovozero Massif
    
    		Pekov, I. et al (2003): New Data on Minerals: 38: 20-33. 
    






              • Umbozero mine (Umba mine)
    
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    





Pavel M. Kartashov data
    




[World of Stones 95:5-6, p64]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    




Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    





American Mineralogist: 90: 1467-1468.
    USA
     
    

    • Colorado
    

      • Boulder Co.
    

        • Jamestown District
    
    		Minerals of Colorado (1997) E.B. Eckels
    

    • New Mexico
    

      • Colfax Co.
    

        • Springer
    

          • Point of Rocks Mesa (Pecks Mesa)
    
    		Rocks & Min.:60:229.
    


    


    

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