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Cryptomelane Group

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Big Photo

Hollandite
Königsberg, Wolfstein, Palatinate, Rhineland-Palatinate, Germany
© Peter Haas

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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

Group Members:
Coronadite
Pb(Mn
4+
 
,Mn
3+
 
)
 
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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    • Localities for Cryptomelane Group

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    Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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    New Locality Added: Klein Aukas Farm 66, Karibib District, Erongo Region, NamibiaFrom Debbie Woolf, 14th Feb 2012 01:27:00