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Meymacite

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Formula:
WO3 · 2H2O
Colour:
Yellow
Crystal System:
Amorphous
Name:
Named for the town of Meymac, France. The original substance named meymacite was later found to be ferritungstite. However the name was then reused for this new mineral found in both Zaïre and at Meymac. This redifinition was by R. Pierrot and R. van Tassel in 1965.
An amorphous hydrated tungsten oxide.


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Classification of MeymaciteHide

Approved, 'Grandfathered' (first described prior to 1959)
4.FJ.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
J : Hydroxides with H2O +- (OH); corner-sharing octahedra
4.5.3.1

4 : SIMPLE OXIDES
5 : AX3
7.15.7

7 : Oxides and Hydroxides
15 : Oxides of Mo and W

Physical Properties of MeymaciteHide

Colour:
Yellow

Chemical Properties of MeymaciteHide

Formula:
WO3 · 2H2O

Crystallography of MeymaciteHide

Crystal System:
Amorphous

Type Occurrence of MeymaciteHide

Synonyms of MeymaciteHide

Other Language Names for MeymaciteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Ferberite1 photo of Meymacite associated with Ferberite on mindat.org.
Hydrokenoelsmoreite1 photo of Meymacite associated with Hydrokenoelsmoreite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.FJ.05SidwilliteMoO3 · 2H2OMon.
4.FJ.10TungstiteWO3 · H2OOrth.
4.FJ.15HydrotungstiteWO3 · 2H2OMon.
4.FJ.15IlsemanniteMo3O8 · nH2O

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.15.1TugarinoviteMoO2Mon.
7.15.2MolybditeMoO3Orth.
7.15.3SidwilliteMoO3 · 2H2OMon.
7.15.4IlsemanniteMo3O8 · nH2O
7.15.5TungstiteWO3 · H2OOrth.
7.15.6HydrotungstiteWO3 · 2H2OMon.
7.15.8Alumotungstite2W2O6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
7.15.9JixianitePb(W,Fe3+)2(O,OH)7Iso. m3m (4/m 3 2/m) : Fd3m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for MeymaciteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Carnot, A. (1874) Sur quelques minéraux de bismuth et de tungstène de la mine de Meymac (Corrèze). Comptes Rendus Hebdomadaires des Séances de l’Académie des Sciences: 79: 302-306. (in French)
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 606.
van Tassel, R. (1961) Ferritungstite et meymacite de Meymac, France, et d'Afrique centrale. Bulletin de la Societé belge de Géologie: 70: 376-399. (in French)
Pierrot, R., van Tassel, R. (1965) Nouvelle définition de la meymacite et nomenclature de « acides tungstiques » naturels. Bulletin de la Société Française de Minéralogie et de Cristallographie: 88: 613-617. (in French)
Fleischer, M. (1968) New mineral names. American Mineralogist: 53: 1063-1066.

Internet Links for MeymaciteHide

Localities for MeymaciteHide

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.
Democratic Republic of the Congo (TL)
 
  • Sud-Kivu
    • Mwenga
Bull.Soc.fr.Min.Crist.(1965) 88, 613-617
France
 
  • Nouvelle-Aquitaine
    • Corrèze
R. van Tassel (1961) Bull. Soc. fr. Mineral. Crist. 70, 376
Ansermet, S., Cuchet, S. & Meisser, N. (2010): Minéralogie de la mine de La grange, Meymac, Corrèze. Le Règne Minéral, 91: 23-31
Lebocey, J., Thiery, V. & Gratia, B. (2010): La concession minière de Meymac, Corrèze. Le Règne Minéral, 91: 9-21
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Wolfach
        • Oberwolfach
          • Rankach valley
Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German)
Italy
 
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Ossola Valley
        • Pieve Vergonte
Mattioli, V. (1979): Minerali Ossolani. Ed. Arti Grafiche Medesi, Milano, 270 pp.
  • Sardinia
    • Cagliari Province
      • Siurgus Donigala
Lovisato D.(1907) Giacimento di minerali di tungsteno a Genna Gureu ai limiti fra Nurri e Orroli.Reale Accademia dei Lincei, pag 632 - 638
Malaysia
 
  • Malacca (Melaka)
    • Gujang Mts
Gunnar Färber
Portugal
 
  • Vila Real District
    • Montalegre
      • Salto
Exemplares no Museu Alfredo Bensaude, IST lisboa
Spain
 
  • Extremadura
    • Cáceres
      • Almoharín
Bocamina, GMM (Grupo Mineralogista de Madrid)
Mineral and/or Locality  
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