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Meymacite

Big Photo

Meymac, Corrèze, Limousin, France
© Thomas Witzke

Formula:
WO
 
3
·2H
 
2
O
System:AmorphousColour:Yellow
Name:After the locality of Meymac, Corrèze, France.


An amorphous hydrated tungsten oxide.

Classification of Meymacite

IMA status:Approved
Strunz 8th edition ID:4/E.02-20
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:4.5.3.1

4 : SIMPLE OXIDES
5 : AX3
Hey's CIM Ref.:7.15.7

7 : Oxides and Hydroxides
15 : Oxides of Mo and W
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Type Occurrence of Meymacite

Type Locality:Nzombe, Kivu, Democratic Republic of Congo (Zaïre)
Year of Discovery:1961

Physical Properties of Meymacite

Colour:Yellow

Crystallography of Meymacite

Crystal System:Amorphous

Chemical Properties of Meymacite

Formula:
WO
 
3
·2H
 
2
O
Essential elements:H, O, W
All elements listed in formula:H, O, W

Relationship of Meymacite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.FJ.05Sidwillite
MoO
 
3
·2H
 
2
O
4.FJ.10Tungstite
WO
 
3
·H
 
2
O
4.FJ.15Hydrotungstite
WO
 
3
·2H
 
2
O
4.FJ.15Ilsemannite
Mo
 
3
O
 
8
·nH
 
2
O
4.FJ.20Parabariomicrolite
BaTa
 
4
O
 
10
(OH)
 
2
·2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
7.15.1Tugarinovite
MoO
 
2
7.15.2Molybdite
MoO
 
3
7.15.3Sidwillite
MoO
 
3
·2H
 
2
O
7.15.4Ilsemannite
Mo
 
3
O
 
8
·nH
 
2
O
7.15.5Tungstite
WO
 
3
·H
 
2
O
7.15.6Hydrotungstite
WO
 
3
·2H
 
2
O
7.15.8Alumotungstite
(W,Al)(O,OH)
 
3
7.15.9Jixianite
Pb(W,Fe
3+
 
)
 
2
(O,OH)
 
7

Other Names for Meymacite

Synonyms:
MeyamaciteMeymacite (of Pierrot and Van Tassel)
Other Languages:
German:Meyamacit
Meymacit
Spanish:Meyamacita
Meymacita

Other Information

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

References for Meymacite

Reference List:Carnot (1874), C.R.: 79: 639.

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.

Bulletin de la Société française de Minéralogie et de Cristallographie (1965): 88: 613-617.

American Mineralogist (1968): 53: 1065.

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    Localities for Meymacite

    Hide Locality List
    The 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. ? 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.
    Democratic Republic of Congo (Zaïre)
     
    • Kivu
    		Bull.Soc.fr.Min.Crist.(1965) 88, 613-617
    France
     
    • Limousin
      • Corrèze
    		R. van Tassel (1961) Bull. Soc. fr. Mineral. Crist. 70, 376
    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
    Spain
     
    • Extremadura
      • Cáceres
        • Almoharín
    		Bocamina, GMM (Grupo Mineralogista de Madrid)
    Mineral and/or Locality
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