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Birnessite Group
This page provides mineralogical data about Birnessite Group.
Classification of Birnessite Group
mindat.org URL:
http://www.mindat.org/min-35538.html
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Relationship of Birnessite Group to other Species
Minerals in Group:
Birnessite
:
(Na,Ca)
0.5
(Mn
4+
,Mn
3+
)
2
O
4
· 1.5H
2
O
Ranciéite
:
(Ca,Mn)Mn
4
O
9
·3H
2
O
Takanelite
:
(Mn,Ca)Mn
4
O
9
·H
2
O
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 Birnessite Group
Search Engines:
Look for Birnessite Group on Google
Look for Birnessite Group images on Google
Mineral Dealers:
Buy Minerals and Crystals from Crystalarium.com
Wendel Minerals - Auktion & Shop
rare and unusual minerals mainly crystallized
Rare and Unusual minerals at Mineralogical Research Company
Find Birnessite Group on www.crystalclassics.co.uk
Buy from David K Joyce minerals
Wilensky Fine Minerals
Mineral Classics - Worldwide Collector Quality Minerals and Gems
Buy Fine Minerals from mineralsweb.com
Buy minerals from Mineralium.com
The Arkenstone - Fine Minerals
High-end worldwide specimens & outstanding customer service
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