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Universalium. 2010.
Bertrandite — Bertrandite[1] Catégorie IX : silicates[2] … Wikipédia en Français
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… … Wikipedia
bertrandite — noun A basic beryllium sorosilicate that is an ore of beryllium … Wiktionary
bertrandite — ber·trand·ite … English syllables
bertrandite — ˈbər.trənˌdīt noun ( s) Etymology: French, from E. Bertrand, 19th century Frenchman who first described it + French ite : a mineral Be4Si2O7(OH)2 consisting of a beryllium silicate occurring in hard colorless or pale yellow prismatic crystals… … Useful english dictionary
Beryllium — (pronEng|bəˈrɪliəm) is a chemical element with the symbol Be and atomic number 4. A bivalent element, beryllium is a steel grey, strong, light weight yet brittle alkaline earth metal. It is primarily used as a hardening agent in alloys, most… … Wikipedia
Period 2 element — A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements. The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behaviour of the… … Wikipedia
List of minerals A-B (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… … Wikipedia
List of minerals — This is a List of minerals for which there are Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter.For a complete listing (about 4,000) of all mineral names: List of minerals… … Wikipedia
Orthorhombic crystal system — An example of the orthorhombic crystals, aragonite In crystallography, the orthorhombic crystal system is one of the seven lattice point groups. Orthorhombic lattices result from stretching a cubic lattice along two of its orthogonal pairs by two … Wikipedia
