Summary
Potosiite and incaite have been found at the Hoei mine, Oita Prefecture, Japan. Potosiite occurs as tabular crystals (3 cm x 2 cm in size), and is associated with arsenopyrite, pyrrhotite, stannite,jamesonite and pyrite, whereas incaite occurs as polycrystalline aggregates rimming galena or as hair-like masses in a matrix of kutnahorite. X-ray powder data reveal that these minerals are potosiite and incaite, respectively. Electron-microprobe analyses of potosiite and incaite gave the general formula (Pb, Sn)2+ 6+xFeSb2Sn4+ 2S14+x, with x < 2. Potosiite is homogeneous, whereas incaite, in contact with galena, is quite heterogeneous. Reflectance data for potosiite show that its bireflectance is one of the lowest among opaque minerals with a sheet-like structure.
Zusammenfassung
Potosiit and Incait wurden in Erzen der Hoei-Mine, Oita Präfektur, Japan, nachgewiesen. Potosiit kommt in plattigen Kristallen (3 cm x 2 cm) vor and ist mit Arsenkies, Magnetkies, Zinnkies, Jamesonit and Pyrit assoziiert. Incait kommt in polykristallinen Aggregaten, die Ränder um Bleiglanz bilden, oder als Haar-artige Massen in einer Matrix von Kutnahorite vor. Röntgendiffraktionsdaten zeigen, daß es sich hier um Potosiit and Incait handelt; Mikrosondenanalysen der beiden Minerale geben die allgemeine Formel (Pb, Sn)2+ 6+x(FeSb2 4+)2S4+x, with x < 2. Potosiit ist homogen, während Incait in Kontakt mit Bleiglanz inhomogen ist. Quantitative Reflexionsdaten für Potosiit zeigen, daß seine Bireflexion zu den niedrigsten bei opaken Mineralen mit Schichtgitter gehört.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Kissin SA, Owens DR (1986) The properties and modulated structure of potosiite from the Cassiar District, British Columbia. Can Mineral 24: 45–50
McQueen KG (1988) Teallite, low-antimony franckeite and tin-bearing galena from the Wallah mine, Rye Park, New South Wales. Austral Min 3:111–116
Makovicky E (dy1974) Mineralogical data on cylindrite and incaite. Neues Jahrb Mineral Monats 235–256
Miyahisa M (1961) Geological studies on the ore deposits of Obira-type in Kyushu. (1) general geology and metallogenetic provinces. Japan J Geol Geogr 32: 39–54
Moh GH (1984) Sulfosalts: observations and mineral descriptions, experiments and applications. Neues Jahrb Mineral Abh 150: 25–64
—— (1986) Current ore petrology: microscopy, genesis, analyses and experimentation. Neues Jahrb Mineral Abh 153: 245–324
—— (1987) Mutual Pb2+/Sn2+ substitution in sulfosalts. Mineral Petrol 36: 191–204
Mozgova NN, Borodayev YuS, Sveshnikova OL (1975) New data on franckeite and cylindrite. Dokl Akad Nauk SSSR 220: 191–194 (in Russian)
Mozgova NN, Organova NI, Gorshkov AI (1976) Structural resemblance between incaite and franckeite. Dokl Akad Nauk SSSR 228: 705–708 (in Russian)
Shimizu M (1991) New data on franckeite from Hoei, Japan. In: Moh GH et al. Thallium and gold: observations and experimental contributions to mineralogy, geochemistry and crystalochemistry. Neues Jahrb Mineral Abh 163: 261–263
——Shikazono N (1985) Iron and zinc partitioning between coexisting stannite and sphalerite: a possible indicator of temperature and sulfur fugacity. Mineral Deposita 20: 312–320
Williams TB, Hyde BG (1988) Electron microscopy of cylindrite and franckeite. Phys Chem Minerals 15: 521–544
Wolf M, Hunger HJ, Bewilogua K (1981) Potosiit-ein neues Mineral der Kylindrit-Franckeit Gruppe. Freiberg Forschngsh C364: 113–133
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Shimizu, M., Moh, G.H. & Kato, A. Potosiite and incaite from the Hoei mine, Japan. Mineralogy and Petrology 46, 155–161 (1992). https://doi.org/10.1007/BF01160184
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01160184