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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 Meridianiite ： ウィキペディア英語版 Meridianiite Meridianiite — MgSO4•11H2O — is the crystalline 11-hydrate magnesium sulfate phase that precipitates from solutions saturated in Mg2+ and SO42− ions at temperatures less than 2 ˚C. Clear to colorless, it is a naturally occurring mineral species found on Earth in a variety of environments including sea ice, crusts and efflorescence’s in coal/metal mines, cave systems, oxidized zones of sulfide deposits, salt lakes/playa’s and Antarctic ice-cores. Named for locality data obtained by the NASA Opportunity Rover at Meridiani Planum,〔 it has been suggested that mineral casts present in the Martian sulfate deposits are indicative of this minerals former presence in the area. It is commonly associated with other evaporite minerals such as epsomite, mirabilite, halides, and other sodium-magnesium-sulfates. == Properties == Meridianiite belongs to the triclinic crystal system, having cell parameters a = 6.7459 Å, b = 6.8173 Å, c = 17.299 Å, a density = 1.512 g/cm-3, x-ray diffraction peaks at d-spacing’s = 5.73, 5.62, 5.41, 4.91, 4.85, 2.988, 2.958 (highest intensity), and 2.940, and is IR active. It produces needle-shaped to broad flat crystals that are clear to colorless-white, and decomposes incongruently above 2 °C to produce epsomite (MgSO4•7H2O) and water. 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「Meridianiite」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.