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More Indepth notes on Metals
Source: Bibliography
Geological Rocks & Minerals 
Designed by Nigel G Wilcox
Ref: H4
Photographs Courtesy :Calvin J Hamilton
Hollandite
Name: Hollandite
Location: Serra do Navio, Brazil
Date: 2010
Composition: (Ba,K)Mn8O16 
Copyright   All Rights Reserved  by Nigel G Wilcox         E-Mail: ngwilcox100@gmail.com
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