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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Vlasovite ： ウィキペディア英語版 Vlasovite Vlasovite is a rare inosilicate (chain silicate) mineral with sodium and zirconium, with the chemical formula Na2ZrSi4O11. It was discovered in 1961 at Vavnbed Mountain in the Lovozero Massif, in the Northern Region of Russia. The researchers who first identified it, R P Tikhonenkova and M E Kazakova, named it for Kuzma Aleksevich Vlasov (1905–1964), a Russian mineralogist and geochemist who studied the Lovozero massif, and who was the founder of the Institute of Mineralogy, Geochemistry, and Crystal Chemistry of Rare Elements, Moscow, Russia. == Structure == At temperatures below 29 °C the stable form of vlasovite is triclinic , space group P. Above 29 °C the stable form is monoclinic 2/m.〔 Most sources simply give it as monoclinic 2/m, space group C2/c. The silicate part of the structure is a chain composed of rings of four SiO4 tetrahedra linked by sharing a corner oxygen to form a chain of composition ()6−. These chains of tetrahedra link together with zirconium, Zr, octahedra to form a framework with channels extending along (), parallel to the c crystal axis. The channels contain the sodium, Na, atoms.〔Canadian Mineralogist (2006) 44: 1349-1356〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Vlasovite」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.