翻訳と辞書 Words near each other ・ Seward Township, Nobles County, Minnesota ・ Seward Township, Winnebago County, Illinois ・ Seward Trunk Co. ・ Seward's Day ・ Seward's Success, Alaska ・ Seward, Alaska ・ Seward, Illinois ・ Seward, Kansas ・ Seward, Minneapolis ・ Seward, Nebraska ・ Seward, New York ・ Seward, North Carolina ・ Seward, Oklahoma ・ Seward, Pennsylvania ・ Sewardiella ・ Sewardite ・ Sewards End ・ Sewardsley Priory ・ Sewardstone ・ Sewardstonebury ・ Sewaren, New Jersey ・ Sewarhi ・ Sewari ・ Sewart Air Force Base ・ SeWave ・ Sewda (Vidhan Sabha constituency) ・ SewEasy ・ Sewed Soles ・ Sewee ・ Sewee Mound Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Sewardite ： ウィキペディア英語版 Sewardite Sewardite is a rare arsenate mineral with formula of CaFe2+3(AsO4)2(OH)2.〔 Sewardite was discovered in 1982 and named for the mineralogist, Terry M. Seward (born 1940), a professor of geochemistry in Zürich, Switzerland.〔 == Properties == Sewardite is orthorhombic, which means in crystallographic terms, it contains 3 axes of unequal length, one "c" axis, and 1 "a" axis, and 1 "b" axis. The "c" axis runs vertically, and the "b" axis forms a 90 degree angle with the "c" axis; the "a" axis forms an angle that is less than 90 degrees. Its class structure in the crystal system, orthorhombic, is mmm (2/m 2/m 2/m) - dipyramidal. Sewardite can form platy to compact anhedral to subhedral masses up to 0.3 mm in size in a single specimen.〔(Roberts, A.C., Cooper, M.A., Hawthorne, F.C., Criddle, A.J., and Striddle, J.A.R. (2002) Sewardite, CaFe32+(AsO4)2(OH)2, the Ca-analog of carminite, from Tsumeb, Namibia: description and crystal structure. Canadian Mineralogist, 40, 1191-1198 )〕 In terms of its optical properties, sewardite is weakly anisotropic, which means the velocity of light varies depending on the direction through the mineral. Its color in plane-polarized light is dark red, and it does not exhibit pleochroism, which means it does not appear to be a different color when observed at different angles under a polarizing petrographic microscope. Sewardite illustrates weak birefringence; birefringence is directly dependent on the material being anistropic, so since sewardite is weakly anistropic, it exhibits weak birefringence.〔"Mineral General Info." http://www.mineralatlas.com/mineral%20optical%20descriptions/S/sewarditeopt.htm. Accessed 7 November 2010.〕 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「Sewardite」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.