 | RYU, Toru, KIMATA, Mitsuyoshi, NISHIDA, Norimasa, KYONO, Atsushi, SHIMIZU, Masahiro (2005) Chemical composition of ferrocolumbites from the Ishikawa-yama granitic pegmatites, Fukushima, Japan. Japanese Magazine of Mineralogical and Petrological Sciences, 34 (5) 242-251 doi:10.2465/gkk.34.242 | Journal (article/letter/editorial) | | ferrocolumbites from the Ishikawa−yama granitic pegmatites, Fukushima, Japan 龍 徹 (Toru RYU)* 木股 三善 (Mitsuyoshi...ferrocolumbites from the Ishikawa−yama granitic pegmatites, Fukushima, Japan, has been revealed by electron...and Nb; (3) a trend with patchy zoning related to Fe and Mn. Oscillatory zoning of ferrocolumbite is intimately...Chemical composition, Compositional trend, The Ishikawa−yama granitic pegmatites I. は じ め に 鉄コルンブ石 [FeNb2O6]，マンガノコルンブ石...コルンブ石の化学組成は (Fe,Mn) (Nb,Ta)2O6 で，Nb に富む コルンブ石に対して，Ta に富むものはタンタル石に分類 される。コルンブ石―タンタル石系列では Fe と Mn, Nb と Ta |  | | Report (issue) | | mineral col lector, was born in Kanazawa, Ishikawa Prefecture, on August 30, 1874. Soon after his graduation...a mining engineer at the Arakawa Mine, Akita Prefecture. In 1909, he was promoted to Director of the...of the Director of the Yoshioka Mine, Okayama Prefecture, for about seven years altogether. He returned...technology in the first half of this century in Japan. He retired from the Advisory Board of the Mitsu...such volumes as " Beiträge zur Mineralogie von. Japan ", Neue Folge I and II (T. Ito, 1937), " Japanese |  | | Book | | iron-titanium oxides: Most widespread hematite Fe^O^, ilmenite FeTiO^, magnetite F e ^ , and rutile...(Mg,Fe)Cr 0^ are common in ultrabasic in2 trusives. The iron sulfides pyrite FeS^, pyrrhotite Fe^ S...molybdenite ? INTRODUCTION 3 M o S , wolframite (Fe, Mn)W0^, and also the pure elements such 2 as bismuth...manganese (pyrolusite M n 0 ) or of iron (hematite 2 Fe 0 2 3 or goethite FeOOH) can precipitate in oxidizing...pyrite F e S , is typical. 2 sulfides pyrrhotite Fe^ In addition to pyrite the S» chalcopyrite CuFeS^ |
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