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Villiaumite

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Formula:
NaF
System:
Isometric
Colour:
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.

Classification of Villiaumite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
3.AA.20

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
9.1.1.3

9 : NORMAL HALIDES
1 : AX
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

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

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:
2.79 g/cm3 (Measured)    2.81 g/cm3 (Calculated)

Crystallography of Villiaumite

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
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
All elements listed in formula:
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

3.AA.05MarshiteCuI
3.AA.05Miersite(Ag,Cu)I
3.AA.05NantokiteCuCl
3.AA.05UM1999-11:I:CuSCu(I,S)
3.AA.10IodargyriteAgI
3.AA.10Tocornalite(Ag,Hg)I
3.AA.15BromargyriteAgBr
3.AA.15ChlorargyriteAgCl
3.AA.20CarobbiiteKF
3.AA.20GriceiteLiF
3.AA.20HaliteNaCl
3.AA.20SylviteKCl
3.AA.25SalammoniacNH4Cl
3.AA.25UM1998-03-Cl:TlTlCl
3.AA.25LafossaiteTl(Cl,Br)
3.AA.30Calomel(Hg2)2+Cl2
3.AA.30Kuzminite(Hg22+)(Br,Cl)2
3.AA.30Moschelite(Hg22+)I2
3.AA.35NeighboriteNaMgF3
3.AA.40ChlorocalciteKCaCl3
3.AA.45KolaritePbTeCl2
3.AA.50RadhakrishnaitePbTe3(Cl,S)2
3.AA.55ChallacolloiteKPb2Cl5
3.AA.60HephaistositeTlPb2Cl5

Other Names for Villiaumite

Name in Other Languages:
German:Villiaumit
Simplified Chinese:氟盐
Spanish:Villiaumita
Traditional Chinese:氟鹽

Other Information

Thermal Behaviour:
Becomes colourless and isotropic whe heated to 300°.
Other Information:
Soluble in water.
Health Risks:
Poisonous! Fluoride ion in water-soluble form is what makes this mineral highly toxic. Its availability in macrospecimens, and the attractive colour, might lure small children into tasting it. 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.
Wash hands after handling; do not generate dust by grinding or sawing; and keep out of reach of small children.
Oral ld50 close to 50mg/kg (52 in rat, 57 in mouse).
See MSDS Ref. S3722

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(5): 213-216.

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.

Stormer, J.C., 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: 3: 111-113.

Horváth, L., Gault, R.G. (1990) The mineralogy of Mont Saint Hilaire. Mineralogical Record: 21: 284 359.


Internet Links for Villiaumite

Specimens:
The following Villiaumite specimens are currently listed for sale on minfind.com.

Localities for Villiaumite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 alkaline complex
      • Poços de Caldas
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
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
      • Lajemmerais RCM
        • Varennes & St-Amable
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.
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.
Greenland
 
  • Kujalleq
    • Narsaq
Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
        • 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; Henning Sørensen and Lotte Melchior Larsen (2001) The hyper-agpaitic stage in the evolution of the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin 190, 83–94
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)
Moreau, C., Ohnenstetter, D., Demaiffe, D., & Robineau, B. (1996). The Los Archipelago nepheline syenite ring-structure; a magmatic marker of the evolution of the Central and Equatorial Atlantic. The Canadian Mineralogist, 34(2), 281-299.
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. Moreau, C., Ohnenstetter, D., Demaiffe, D., & Robineau, B. (1996). The Los Archipelago nepheline syenite ring-structure; a magmatic marker of the evolution of the Central and Equatorial Atlantic. The Canadian Mineralogist, 34(2), 281-299.; Biagioni, C., Bonaccorsi, E., Merlino, S., Parodi, G. C., Perchiazzi, N., Chevrier, V., & Bersani, D. (2010). Roumaite,(Ca, Na,□) 3 (Ca, REE, Na) 4 (Nb, Ti)[Si2O7] 2 (OH) F3, from Rouma Island, Los Archipelago, Guinea: a new mineral species related to dovyrenite. The Canadian Mineralogist, 48(1), 17-28.
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
          • Koashva Mt
Arzamastsev, A., Yakovenchuk, V., Pakhomovsky, Y., & Ivanyuk, G. (2008). The Khibina and Lovozero alkaline massifs: Geology and unique mineralization. In Guidbook for 33rd International Geological Congress Excursion (No. 47, p. 58).
[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; Kapustin, Y. L., Pudovkina, Z. V., Bykova, A. V., & Lyubomilova, G. V. (1975). Koashvite, a new mineral. International Geology Review, 17(6), 654-660.; Khomyakov, A.P., Nechelyustov, G.N., Rastsvetaeva, R.K., Rozenberg, K.A. (2008): Andrianovite, Na12(K,Sr,Ce)3Ca6Mn3Zr3NbSi25O73(O,H2O,OH)5-a new potassium-rich mineral of the eudialyte group from Khibiny alkaline massif, Kola Peninsula, Russia. Zapiski RMO (Proceedings of the Russian Mineralogical Society), 137(2), 43-52. [English translation: Geology of Ore Deposits 50,705-712(2008)]
ZRMO 138(2),52-66(2009)
[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; Khomyakov, A. P., Pushcharovskiy, D. Y., & Ronsbo, J. G. (1983). Clinophosinaite, Na3CaPSiO7, a new mineral. International Geology Review, 25(6), 731-734.; Kapustin, Y. L., Pudovkina, Z. V., & Bykova, T. Y. (1982). Dorfmanite, a new mineral. International Geology Review, 24(1), 111-115.
        • Lovozero Massif
Pekov, I. et al (2003): New Data on Minerals: 38: 20-33.
Pavel M. Kartashov data
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Khomyakov A P, Shumyatskaya N G, Polezhaeva L T (1992) Shomiokite-(Y), Na3Y(CO3)3·3H2O: a new mineral, Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 121, issue 6 129-132
V. Grishin collection
[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.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.
            • Karnasurt underground mine
              • Karnasurt area
Pluth, J. J., Smith, J. V., Pushcharovsky, D. Y., Semenov, E. I., Bram, A., Riekel, C., ... & Broach, R. W. (1997). Third-generation synchrotron x-ray diffraction of 6-μm crystal of raite,≈ Na3Mn3Ti0. 25Si8O20 (OH) 2⋅ 10H2O, opens up new chemistry and physics of low-temperature minerals. Proceedings of the National Academy of Sciences, 94(23), 12263-12267.
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
              • Kedyk area
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.
Mineral and/or Locality  
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