Stibiotantalite-group minerals in a lithium pegmatite from Nagatare, Fukuoka Prefecture, Japan
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概要
- 論文の詳細を見る
Stibiotantalite-group minerals were found from a lithium pegmatite, Nagatare, Fukuoka Prefecture, Japan. Two samples were examined; one is stibiotantalite, compositionally close to the ideal formula SbTaO4 and the other is a member of bismutotantalite-stibiotantalite series. The stibiotantalite grain is homogeneous in composition, and has high Ta/(Ta+Nb) values of 0.91-0.92. The bismutotantalite-stibiotantalite grain is very heterogeneous, and the ranges of Bi/(Bi+Sb) and Ta/(Ta+Nb) values are 0.26-0.54 and 0.71-0.81, respectively. This grain is heavily veined by Bi-poorer stibiotantalite. Compositional variation in Bi/(Bi+Sb) of this grain indicates the existence of solid solution between bismutotantalite and stibiotantalite with relatively wide range. The unit cell parameters of the stibiotantalite and the bismutotantalite-stibiotantalite are; orthorhombic a=4.916(1), b=11.811(1), c=5.536(1) Å and a=4.945(1), b=11.794(2), c=5.592(1) Å, respectively.
- 日本鉱物科学会の論文
著者
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Oba Masahiro
Department of Chemistry, University of Tsukuba
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Oba Masahiro
Department Of Chemistry University Of Tsukuba
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Bunno M
Aist Ibaraki Jpn
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Haruna Makoto
National Institute Of Advanced Industrial Science And Technology
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BANNO Yasuyuki
National Institute of Advanced Industrial Science and Technology
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BUNNO Michiaki
National Institute of Advanced Industrial Science and Technology
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Banno Y
National Institute Of Advanced Industrial Science And Technology
関連論文
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- Stibiotantalite-group minerals in a lithium pegmatite from Nagatare, Fukuoka Prefecture, Japan
- Determination of activation energy and pre-exponential factor for individual compounds on release from kerogen by a laboratory heating experiment