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出典:Wiktionary
出典:『Wiktionary』 (2025/04/20 19:03 UTC 版)
From Bertrand + -ite, named after French mineralogist Émile Bertrand (1844-1909) in 1883.
bertrandite (countable and uncountable, plural bertrandites)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/14 12:10 UTC 版)
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.