Bertrandite

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Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. A basic beryllium sorosilicate that is an ore of beryllium.
    • The Century Dictionary and Cyclopedia
  • n. A hydrous silicate of glucinum, occurring in minute orthorhombic crystals in pegmatite near Nantes in France.
    • Word Usage
    "In addition to being found in beryl, beryllium is found in the mineral bertrandite Be4Si2O7 (OH) 2, which in recent years has become a major ore of this element, in addition to beryl."
     
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