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Mindat Auctions
Cryptomelane Group
Les Montmins Mine (Ste Barbe vein), Échassières, Ébreuil, Allier, Auvergne, France
© P.Queneau
Show Cryptomelane Group Photos (2)
A group of very common, tetragonal and monoclinic-pseudotetragonal metal manganese oxides.
Classification of Cryptomelane Group
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Relationship of Cryptomelane Group to other Species
Minerals in Group:
Coronadite
:
Pb(Mn,Mn)
8
O
16
Cryptomelane
:
K(Mn
4+
,Mn
2+
)
8
O
16
Hollandite
:
Ba(Mn
4+
,Mn
2+
)
8
O
16
Manjiroite
:
(Na,K)Mn
8
O
16
·nH
2
O
Strontiomelane
:
SrMn
4+
6
Mn
3+
2
O
16
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.
Internet Links for Cryptomelane Group
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Mineral Dealers:
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Localities for Cryptomelane Group
(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.
Germany
Bavaria
Franconia
Fichtelgebirge
Fichtelberg
Mehlmeisel
Rotenfels Mt.
?
Meier, S. (2007): Das Flötztal im südlichen Fichtelgebirge. Lapis 32, 17-20; 58.
Mineral
and/or Locality
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