Syntheses of valleriite

Kazuaki Iiishi; Takeshi Tomisaka; Toshio Katô; Setsuo Takeno

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Other| December 01, 1970

Syntheses of valleriite

Kazuaki Iiishi;

Kazuaki Iiishi

Department of Mineralogical Sciences and Geology, Faculty of Literature and Science, Yamaguchi University, Yamaguchi, Japan

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Takeshi Tomisaka;

Takeshi Tomisaka

Department of Mineralogical Sciences and Geology, Faculty of Literature and Science, Yamaguchi University, Yamaguchi, Japan

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Toshio Katô;

Toshio Katô

Department of Mineralogical Sciences and Geology, Faculty of Literature and Science, Yamaguchi University, Yamaguchi, Japan

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Setsuo Takeno

Institute of Geology and Mineralogy, Faculty of Science, Hiroshima University, Hiroshima, Japan.

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Author and Article Information

Kazuaki Iiishi

Department of Mineralogical Sciences and Geology, Faculty of Literature and Science, Yamaguchi University, Yamaguchi, Japan

Takeshi Tomisaka

Department of Mineralogical Sciences and Geology, Faculty of Literature and Science, Yamaguchi University, Yamaguchi, Japan

Toshio Katô

Department of Mineralogical Sciences and Geology, Faculty of Literature and Science, Yamaguchi University, Yamaguchi, Japan

Setsuo Takeno

Institute of Geology and Mineralogy, Faculty of Science, Hiroshima University, Hiroshima, Japan.

Publisher: Mineralogical Society of America

First Online: 06 Jul 2018

Online ISSN: 1945-3027

Print ISSN: 0003-004X

Mineralogical Society of America

American Mineralogist (1970) 55 (11-12): 2107–2110.

Abstract

Syntheses in the range 400-700°C at 1000 bars indicate a range of composition of valleriite from 2.0[Mg_0.68A1_0.32(OH)₂] · [CuFeS₂] to 2.3[Mg_0.68A1_0.32(OH)₂] • [CuFeS₂], with an upper stability temperature between 600 and 650°C. The composition determined by synthesis does not agree with that based on the crystal structure of Evans, or with the electronprobe analyses of natural material by Springer.