ブラジルミナスジェライス州産のパイロクロア

門馬 綱一; 松原 聰; 宮脇 律郎; 佐野 貴司; 重岡 昌子; 堀内 弘之

doi:10.14824/jakoka.2016.0_46

2016 Annual Meeting of Japan Association of Mineralogical Sciences

Session ID : R1-10

DOI https://doi.org/10.14824/jakoka.2016.0_46

Conference information

Host: Japan Association of Mineralogical Sciences

R1: Characterization and description of minerals

Pyrochlores from a Nb-mine in Araxá, Minas Gerais, Brazil

*Koichi Momma, Satoshi Matsubara, Ritsuro Miyawaki, Takashi Sano, Masako Shigeoka, Hiroyuki Horiuchi

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Keywords: pyrochlore, barium, cerium, Minas Gerais

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Abstract

Ce- and Ba-bearing pryochlores
were examined in the Nb-ore specimen from Araxá, Minas Gerais, Brazil. EPMA chemical analyses and single crystal diffraction works revealed that they are identified as a Nb-analogue of hydroxykenomicrolite, ( ,REE,Ba)₂(Nb,Ti)₂O₆(OH,F), and a Ba-bearing hydropyrochlore, (H₂O,Ba)₂Nb⁵⁺₂(O,OH)₆(H₂O).

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