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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 Alforsite ： ウィキペディア英語版 Alforsite Alforsite is a barium phosphate chloride mineral with formula: Ba5(PO4)3Cl. It was discovered in 1981, and named to honor geologist John T. Alfors (1930–2005) of the California Geological Survey for his work in the area where it was discovered. Alforsite is a hexagonal colorless crystal in the chemical class phosphates and the group apatite. It is found in certain parts of central California, primarily Fresno, Mariposa, and Tulare Counties. It has also been found in Baja California, Mexico. Alforsite is a constituent of the apatite group of minerals. It crystallizes in the hexagonal crystal system with a point group of 6/m and space group P63/m. It occurs as colorless grains that are hard to distinguish from fluoroapatite, as they both display low birefringence and high relief. ==Composition== Alforsite’s ideal chemical formula is Ba5(PO3)4Cl. Chemical analysis of the composition of alfrosite was demonstrated by the use of an Ortex current digitizer and an electron microbe. Synthetic barium chlorapatite, strontianite, and fluorapatite were used as standards for the elements they contain. The chemical analysis revealed that traces of Mn, S, Si, and Pb were present and provided computational formulas of (Ba4.68Sr0.19Ca0.13)(P2.98Si0.01)O11.96(Cl0.99F0.05) and (Ba4.05Ca0.75Sr0.24Pb0.03)(P2.94Si0.01)O11.93(Cl0.93F0.14). 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「Alforsite」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.