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Bertrandite is a beryllium sorosilicate hydroxide mineral with composition: Be4Si2O7(OH)2. Bertrandite is a colorless to pale yellow orthorhombic mineral with a hardness of 6-7. It is commonly found in beryllium rich pegmatites and is in part an alteration of beryl. Bertrandite often occurs as a pseudomorphic replacement of beryl. It, with beryl, are ores of beryllium.
Additional recommended knowledge
It was discovered near Nantes, France in 1883 and named for the French mineralogist, Léon Bertrand.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Bertrandite". A list of authors is available in Wikipedia.|