A crystalline form of borcarite from the Fuka mine, Okayama Prefecture, Japan
| Accession number;07A0038198 |
| Title;A crystalline form of borcarite from the Fuka mine, Okayama Prefecture, Japan |
| Author;TAKADA MASAYUKI KUSACHI ISAO(Okayama Univ., Okayama, Jpn) KISHI SHIGETOMO TANABE MITSUO YASUDA TAKASHI |
Journal Title;J Mineral Petrol Sci
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Journal Code:G0150B
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ISSN:1345-6296
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VOL.101;NO.6;PAGE.285-288(2006)
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| Figure&Table&Reference;FIG.2, TBL.1, REF.6 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Euhedral crystals of borcarite were found in vugs or fissures of crystal aggregates of nifontovite or pentahydro-borite, which occur as irregularly shaped bodies in the crystalline limestone near the gehlenite-spurrite skarns at the Fuka mine, Okayama Prefecture, Japan. Interfacial angles of the reference faces of borcarite crystals were measured for each zone using a one-circle goniometer. The crystal basically comprises the {110}, {230}, {201}, {124} and {201} faces, but some crystals also have the {100}, {102}, {101}, {130}, {140}, {180}, {311} and {511} faces. Almost all the mineral is thin plate crystals along the zone [010]. The cleavage is perfect on {100}. Striation can be observed in the direction of [001]. This is the first description of a crystalline form of borcarite. (author abst.) |
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