翻訳と辞書 ・ Obrowiec, Opole Voivodeship ・ Obrowo ・ Obrowo, Gmina Czarna Dąbrówka ・ Obrowo, Gmina Miastko ・ Obrowo, Greater Poland Voivodeship ・ Obrowo, Toruń County ・ Obrowo, Tuchola County ・ Obrtince ・ Obrubce ・ Obrubniki ・ Obruby ・ Obruchev (crater) ・ Obruchev Hills ・ Obruchevella ・ Obruchevichthys ・ Obruchevite ・ Obruchevsky District ・ Obruk Dam ・ Obruk, Bor ・ Obrutschew Bjerg Formation ・ Obručné ・ Obrva ・ Obrydy ・ Obryta ・ Obryte, Ostrów Mazowiecka County ・ Obryte, Pułtusk County ・ Obrytki, Grajewo County ・ Obrytki, Łomża County ・ Obrzycko ・ Obrzycko-Zamek
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Obruchevite
Obruchevite, also known as Yttropyrochlore-(Y), is a zero-valent-dominant mineral of the pyrochlore group. Its formula can be written as (Na,Ca,Fe,Y,U)₂(Nb,Ti,Ta)₂(O,OH)₇, or (Y,U,Ca)₂Nb₂O₆ (OH), or YNb₂O₆OH. The name "Yttropyrochlore-(Y)" for this compound was used by Kalita (1957), and Ercit et al. (2003), but it has now become obsolete and will be discarded. The Yttropyrochlore-(Y) as mentioned by Tindle & Breaks (1998) is in fact oxyyttropyrochlore-(Y). ==References==
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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「Obruchevite」の詳細全文を読む
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