Munakataite, a new mineral from the Kato mine, Fukuoka, Japan
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概要
- 論文の詳細を見る
Munakataite, Pb2Cu2(Se4+O3)(SO4)(OH)4, occurs as a thin coating on a fracture in a quartz vein containing Cu-Zn-Pb-Ag-Au ore minerals in the Kato mine, Munakata City, Fukuoka Prefecture, Japan. It is monoclinic with the space group P21/m and lattice parameters a = 9.766(8), b = 5.666(5), c = 9.291(10) Å, β = 102.40(8)°, V = 502.1(8) Å3, and Z = 2. An electron microprobe analysis gave the empirical formula as Pb2.03(Cu1.94Ca0.01)Σ1.95(Se4+O3)1.00(SO4)1.02(OH)3.92 on the basis of Pb + Cu + Ca + Se + S = 6 apfu and the calculated (OH) with a charge balance. Munakataite is a member of the linarite-chenite group, and it is the first selenite mineral in Japan, corresponding to a (SO4)-dominant analogue of schmiederite. The mineral occurs as light-bluish aggregates composed of minute fibrous crystals up to 30 μm long. The calculated density is 5.526 g/cm3, and Mohs hardness is less than 2.
- 2008-10-01
著者
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横山 一己
国立科博・地学
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MATSUBARA Satoshi
Department of Geology and Paleontology, National Museum of Nature and Science
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MOURI Takaaki
Kagawa Prefectural Waterworks Office
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MIYAWAKI Ritsuro
Department of Geology and Paleontology, National Museum of Nature and Science
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YOKOYAMA Kazumi
Department of Geology and Paleontology, National Museum of Nature and Science
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NAKAHARA Masae
Kagawa Prefectural Industrial Technology Center
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横山 一巳
Department of Geology and Paleontology, National Science Museum
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Matsubara Satoshi
Department Of Geology And Paleontology National Museum Of Nature And Science
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Miyawaki R
Department Of Geology And Paleontology National Museum Of Nature And Science
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Miyawaki Ritsuro
Department Of Geology And Paleontology National Science Museum
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Yokoyama Kazumi
Department Of Geology And Paleontology National Museum Of Nature And Science
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Yokoyama Kazumi
Dep. Of Geology And Paleontology National Museum Of Nature And Sci.
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Miyawaki Ritsuro
Department Of Geology And Paleontology National Museum Of Nature And Science
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