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Molybdomenite

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El Dragón mine, Antonio Quijarro Province, Potosí Department, Bolivia
© Brent Thorne

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Formula:
PbSeO
 
3
System:MonoclinicColour:White
Hardness:3½
Name:From the Greek μόλυβδος for "lead" and μήυη for "moon."
This page provides mineralogical data about Molybdomenite.

Classification of Molybdomenite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/K.01-20
Nickel-Strunz 10th (pending) edition ID:4.JF.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
F : Selenites without additional anions, without H2O
Dana 7th edition ID:34.1.1.1
Dana 8th edition ID:34.1.1.1

34 : SELENITES, TELLURITES AND SULFITES
1 : A(XO3)
Hey's CIM Ref.:28.1.5

28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
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Type Occurrence of Molybdomenite

Type Locality:Cacheuta Mine, Cerro de Cacheuta, Sierra de Cacheuta, Mendoza, Argentina
Year of Discovery:1882
Associated Minerals at type locality:
Chalcomenite

Physical Properties of Molybdomenite

Lustre:Pearly
Colour:White
Hardness (Mohs):3½

Crystallography of Molybdomenite

Crystal System:Monoclinic
Cell Parameters:a = 6.86Å, b = 5.48Å, c = 4.5Å
β = 112.75°
Ratio:a:b:c = 1.252 : 1 : 0.821
Unit Cell Volume:V 156.01 ų (Calculated from Unit Cell)

Optical Data of Molybdomenite

Type:Biaxial (-)
RI values: nα = 2.120 nγ = 2.140
2V:Measured: 80°
Maximum Birefringence:δ = 0.020

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v

Chemical Properties of Molybdomenite

Formula:
PbSeO
 
3
Essential elements:O, Pb, Se
All elements listed in formula:O, Pb, Se

Relationship of Molybdomenite to other Species

Related Minerals - Hey's Index Grouping:

- +
28.1.1Chalcomenite
Cu[SeO
 
3
] · 2H
 
2
O
28.1.2Clinochalcomenite
Cu[SeO
 
3
] · 2H
 
2
O
28.1.3Francisite
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
28.1.4Sophiite
Zn
 
2
[Cl
 
2
|SeO
 
3
]
28.1.6Haynesite
(UO
 
2
)
 
3
(OH)
 
2
(SeO
 
3
)
 
2
·5H
 
2
O
28.1.7Derriksite
Cu
 
4
UO
 
2
(SeO
 
3
)
 
2
(OH)
 
6
·H
 
2
O
28.1.8Marthozite
Cu(UO
 
2
)
 
3
(SeO
 
3
)
 
3
(OH)
 
2
·7H
 
2
O
28.1.9Guilleminite
Ba(UO
 
2
)
 
3
(SeO
 
3
)
 
2
(OH)
 
4
·3H
 
2
O
28.1.10Demesmaekerite
Pb
 
2
Cu
 
5
(UO
 
2
)
 
2
(SeO
 
3
)
 
6
(OH)
 
6
·2H
 
2
O
28.1.11Mandarinoite
Fe
 
2
Se
 
3
O
 
9
·4H
 
2
O
28.1.12Cobaltomenite
Co[SeO
 
3
] · 2H
 
2
O
28.1.13Ahlfeldite
(Ni,Co)[SeO
 
3
] · 2H
 
2
O
Related Minerals - Dana Grouping):

- +
34.1.1.2Scotlandite
PbSO
 
3

Other Names for Molybdomenite

Other Languages:
French:Selenite de plomb
German:Bleiselenit
Glasbachit
Molybdomenit
Selenbleispath
Selenichtsaures Bleioxyd
Russian:Молибдоменит
Spanish:Molybdomenita

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 Molybdomenite

Reference List:Kersten (1839) Annalen der Physik, Halle, Leipzig: 46: 277 (as Selenichtsaures Bleioxyd).

Dana, J.D. (1868) System of Mineralogy, 5th. Edition, New York. (aided by G.J. Brush): 669.

Adam, M. (1869) Tableau minéralogique, Paris: 52 (as Glasbachit).

Bertrand (1882) Bulletin de la Société française de Minéralogie: 5: 90 (as Kerstenite).

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 640.

European Journal of Mineralogy (1994): 6: 337.

American Mineralogist (1965): 50: 812.

Canadian Mineralogist (1970): 8: 149-158.

Tschermaks Mineralogische und Petrographische Mitteilungen (1972): 17: 196-207.

Internet Links for Molybdomenite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Molybdomenite in the Natural History Museum (London) online catalogue
  • Molybdomenite details from Handbook of Mineralogy (PDF)
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    Localities for Molybdomenite

    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.
    Argentina
     
    • La Rioja
    		Recursos Minerales de la Republica Argentina, E. O. Zappettini Ed., Buenos Aires 1999 ISSN 0328-2325
    Sarp, H. & G.Burri, Schweiz. Mineral.Petrogr. Mitt. 67, 219-223(1987)
    • Mendoza
      • Sierra de Cacheuta
        • Cerro de Cacheuta
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 640; Bertrand (1882) Bull. Soc. fr. Min. 5, 90-92.
    Bolivia
     
    • Potosí Department
      • Antonio Quijarro Province
    		[MinRec 21:133]
      • Chayanta Province
        • Pakajake Canyon (Pacajake Canyon)
    		[MinRec 32:476]
    Czech Republic
     
    • Moravia (Mähren; Maehren)
      • Olomouc Region
        • Javorník
    		Sejkora, J., Pauliš, P., Malec, J.: Supergenní selenová mineralizace na uranovém ložisku Zálesí v Rychlebských horách. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2004, roč. 12, s. 174-179.
    Germany
     
    • Lower Saxony
      • Harz Mts
        • Lautenthal
    		Wittern: "Mineralfundorte in Deutschland", 2001
    Mexico
     
    • Sonora
      • Mun. de Moctezuma
    		Lapis 2001(1), 11-40
    M. Kampf collection
    UK
     
    • England
      • Devon
        • East Devon
    		Technical Report TR-02-09 (March 2002) Alteration of uraniferous and native copper concretions in the Permian mudrocks of south Devon, United Kingdom - A E Milodowski et al
    USA
     
    • Colorado
      • Moffat Co.
        • Skull Creek District (Blue Mountain District)
    		Minerals of Colorado (1997) Eckels, E. B.
    Mineral and/or Locality
    Google
     
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