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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 Stellerite ： ウィキペディア英語版 Stellerite Stellerite has a general formula of Ca(HREF="http://www.kotoba.ne.jp/word/11/Aluminum" TITLE="Aluminum">Al2Si7O18 )·7H2O. It is named after Georg Wilhelm Steller (1709–1746) who was a German explorer and zoologist that discovered it.〔Pabst, A. (1939) The Relation of Stellerite and Epidesmine to Stilbite. Mineralogical Magazine, 25, 271-276.〕 Like most rare minerals, there aren’t many commercial uses for stellerite yet. Mineral collectors are lucky to find it in good enough crystal form. Zeolites, including Stellerite, have been studied using a dehydration process to gauge the potential use of their phases as molecular sieves, sorbents, and catalysts. 〔Arletti, R., Mazzucato, E., and Vezzalini, G. (2006) Influence of dehydration kinetics on T-O-T bridge breaking zeolites with framework type STI The case of stellerite. American Mineralogist, 91, 628-634.〕 == Crystal Habit == Stellerite is part of the orthorhombic crystal system which means it has three axes of unequal length that intersect at 90° angles. Its crystal class is rhombic-dipyramidal which means it has three perpendicular two-fold rotational axes with perpendicular mirror planes.〔Miller,S.A., and Taylor, J.C. (1985) Neutron Single Crystal Diffraction Study of an Australian Stellerite Zeolites, 5, 7-10.〕 This would look like a dipyramid cut horizontally along the middle to where the top and bottom halves each have four identical faces that can either be compared to the other faces by the 2-fold rotation axes or the mirror planes.〔http://www.cartage.org.lb/en/themes/sciences/physics/solidstatephysics/atomicbonding/crystalstructure/32Crystal/32Crystal.htm. Accessed 2 December 2010〕 Stilbite, another zeolite, is very similar to stellerite in both chemical composition and physical appearance. Stellerite is more commonly found in rounded radiating clusters or as single crystals and appears more transparent than stilbite does.〔 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「Stellerite」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.