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Villiaumite

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Formula:
NaF
Colour:
Dark carmine-red, dark red, light orange, pink
Lustre:
Vitreous
Hardness:
2 - 2½
Specific Gravity:
2.79
Crystal System:
Isometric
Member of:
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.
Hide all sections | Show all sections

Classification of VilliaumiteHide

Approved, 'Grandfathered' (first described prior to 1959)
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

Physical Properties of VilliaumiteHide

Vitreous
Transparency:
Transparent
Colour:
Dark carmine-red, dark red, light orange, pink
Comment:
The reddish colours are due to structural defects, thought to be caused by irradiation (Sørensen, 1973; Jahn et al., 2014). Heating coloured crystals makes them colourless. This is accompanied by strong thermoluminescence (Sørensen, 1973).
Streak:
White
Hardness:
2 - 2½ on Mohs scale
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)

Optical Data of VilliaumiteHide

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

Chemical Properties of VilliaumiteHide

Formula:
NaF
CAS Registry number:
7681-49-4

CAS Registry numbers are published by the American Chemical Society

Crystallography of VilliaumiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 4.63 Å
Unit Cell V:
99.25 ų (Calculated from Unit Cell)
Morphology:
Cubic, often rounded crystals; massive, granular.

Type Occurrence of VilliaumiteHide

Geological Setting of Type Material:
Small miarolytic cavities in nepheline syenite.

Other Language Names for VilliaumiteHide

German:Villiaumit
Simplified Chinese:氟盐
Spanish:Villiaumita
Traditional Chinese:氟鹽

Relationship of Villiaumite to other SpeciesHide

Member of:
Other Members of this group:
CarobbiiteKFIso. m3m (4/m 3 2/m)
GriceiteLiFIso. m3m (4/m 3 2/m) : Fm3m
HaliteNaClIso. m3m (4/m 3 2/m) : Fm3m
SylviteKClIso. m3m (4/m 3 2/m) : Fm3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Aegirine41 photos of Villiaumite associated with Aegirine on mindat.org.
Tuperssuatsiaite25 photos of Villiaumite associated with Tuperssuatsiaite on mindat.org.
Ellingsenite22 photos of Villiaumite associated with Ellingsenite on mindat.org.
Natrolite18 photos of Villiaumite associated with Natrolite on mindat.org.
Pectolite16 photos of Villiaumite associated with Pectolite on mindat.org.
Microcline14 photos of Villiaumite associated with Microcline on mindat.org.
Thermonatrite8 photos of Villiaumite associated with Thermonatrite on mindat.org.
Ussingite7 photos of Villiaumite associated with Ussingite on mindat.org.
Fluorite6 photos of Villiaumite associated with Fluorite on mindat.org.
Nepheline6 photos of Villiaumite associated with Nepheline on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

3.AA.05MarshiteCuIIso. 4 3m : F4 3m
3.AA.05Miersite(Ag,Cu)IIso. 4 3m : F4 3m
3.AA.05NantokiteCuClIso. 4 3m : F4 3m
3.AA.05UM1999-11:I:CuSCu(I,S)
3.AA.10IodargyriteAgIHex. 6mm : P6mm
3.AA.10Tocornalite(Ag,Hg)I
3.AA.15BromargyriteAgBrIso. m3m (4/m 3 2/m) : Fm3m
3.AA.15ChlorargyriteAgClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20CarobbiiteKFIso. m3m (4/m 3 2/m)
3.AA.20GriceiteLiFIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20HaliteNaClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20SylviteKClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.25SalammoniacNH4ClIso. 4 3 2
3.AA.25UM1998-03-Cl:TlTlCl
3.AA.25LafossaiteTl(Cl,Br)Iso. m3m (4/m 3 2/m) : Pm3m
3.AA.30Calomel(Hg2)2+Cl2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.AA.30Kuzminite(Hg2+2)(Br,Cl)2Tet.
3.AA.30Moschelite(Hg2+2)I2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.AA.35NeighboriteNaMgF3Orth. mmm (2/m 2/m 2/m)
3.AA.40ChlorocalciteKCaCl3Orth. mmm (2/m 2/m 2/m) : Pnma
3.AA.45KolaritePbTeCl2Orth.
3.AA.50RadhakrishnaitePbTe3(Cl,S)2Tet.
3.AA.55ChallacolloiteKPb2Cl5Mon. 2/m : P21/b
3.AA.60HephaistositeTlPb2Cl5Mon. 2/m : P21/b

Related Minerals - Dana Grouping (8th Ed.)Hide

9.1.1.1HaliteNaClIso. m3m (4/m 3 2/m) : Fm3m
9.1.1.2SylviteKClIso. m3m (4/m 3 2/m) : Fm3m
9.1.1.4CarobbiiteKFIso. m3m (4/m 3 2/m)
9.1.1.5GriceiteLiFIso. m3m (4/m 3 2/m) : Fm3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.1.1GriceiteLiFIso. m3m (4/m 3 2/m) : Fm3m
8.1.3HaliteNaClIso. m3m (4/m 3 2/m) : Fm3m
8.1.4HydrohaliteNaCl · 2H2OMon.
8.1.5CarobbiiteKFIso. m3m (4/m 3 2/m)
8.1.6SylviteKClIso. m3m (4/m 3 2/m) : Fm3m
8.1.7SalammoniacNH4ClIso. 4 3 2

Fluorescence of VilliaumiteHide

Other InformationHide

Thermal Behaviour:
Becomes colourless and isotropic when heated to 300° (see also commments on colour).
Notes:
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 VilliaumiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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, T. & Lunde, G. (1927): Über das Mineral Villiaumit. Centralblatt für Mineralogie, Geologie und Paläontologie, 1927, 57-66 (in German).
Stormer, J.C., Carmichael, I.S.E. (1970): Villiaumite and the occurrence of fluoride minerals in igneous rocks. American Mineralogist: 55: 126-134.
Sørensen E. (1973): On the adsorption of some anionic collectors on fluoride minerals. Journal of Colloid and Interface Science 45, 601-607.
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.
Jahn, S., von Bezing, L. and Wartha, R. (2014): Aris bei Windhoek in Namibia. Mineralien-Welt 25 (1), 84-110 (in German).

Internet Links for VilliaumiteHide

Localities for VilliaumiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
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
 
  • Northwest Territories
    • Mackenzie District
      • Blachford Lake alkaline complex
        • Thor Lake syenite complex
MÖLLER, V. (2016) The Nature and origin of the Nechalacho Rare Metal Deposit (REE, Nb, Zr), Northwest Territories, Canada. Unpublished Ph.D. thesis, McGill University, Montreal. 409 p.
  • 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; Andersen, T., & Friis, H. (2015). The transition from agpaitic to hyperagpaitic magmatic crystallization in the Ilímaussaq alkaline complex, South Greenland. Journal of Petrology, 56(7), 1343-1364.
        • 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
 
Biagioni, C., Merlino, S., Parodi, G. C., & Perchiazzi, N. (2012). Crystal Chemistry of Minerals of the Wöhlerite Group from the Los Archipelago, Guinea. The Canadian Mineralogist, 50(3), 593-609.
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.; Windisch, W. (2014) An introduction to micromounting.; Jost, B.M., Koller, F., Vogel, N., Ulmer, P. & Driesner, T. (2014) Origin of water in miarolitic cavities of the Ariskop phonolite, Namibia. Goldschmidt 2014, 8-13 June, Sacramento, California USA, Abstracts, 1177.; Kolitsch, U., Blaß, G., Jahn, S., Cámara, F., von Bezing, L., Wartha, R. R., Tremmel, G., Sturla, M., Cerea, P., Skebo, M. and Ciriotti, M. E. (2016) Aris - mineralogy of the famous alkaline phonolite. AMI - Associazione Micromineralogica Italiana, Cremona, Italy, 95 pp.; 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
    • Murmanskaya Oblast'
      • 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; Belakovskiy D, Smith D G W, Welch M (2013) New mineral names. American Mineralogist 98, 811-815
          • Rasvumchorr Mine
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.V., Zubkova N.V., Filinchuk Ya.E., Chukanov N.V., Zadov A.E., Pushcharovsky D.Yu., Gobechiya E.R. (2010): Shlykovite, KCa[Si4O9(OH)]·3H2O, and cryptophyllite, K2Ca[Si4O10]·5H2O, two new mineral species from the Khibiny alkaline complex, Kola Peninsula, Russia. Zapiski RMO, 139(1), 37-50.
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.
Tanzania
 
  • Arusha Region
Zaitsev, A. N., & Keller, J. (2006). Mineralogical and chemical transformation of Oldoinyo Lengai natrocarbonatites, Tanzania. Lithos, 91(1), 191-207.; Victoria Sekisova, Victor Victorovich Sharygin, A. N. Zaitsev, Stanislav Strekopytov (2015) Liquid Immiscibility Геология и геофизика, 2015, т. 56, № 12, с. 2173—2197
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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