It is one of the nickel-iron sulfide minerals, and is an important ore of the former. It was once called iron sulfide nickelite, but this name is no longer used because violarite (chemical formula FeNi 2 S 4 ), another mineral with the same components, exists. It occurs in orthomagmatic deposits and contact metasomatic deposits (skarn-type deposits), but the former is more important in terms of depositology. Its idiomorph is a regular octahedron, but it is very rare. In Japan, most of it is microscopic, and in the Natsume Mine (closed), Oya-cho, Hyogo Prefecture (now Oya-cho, Yabu City), it coexists with pyrrhotite to form spherical aggregates, and in the Koumori Mine (closed), Oe-cho, Kyoto Prefecture (now Oe-cho, Fukuchiyama City), it coexists with chalcopyrite, pyrrhotite, etc. in veins consisting only of sulfides. It is also found in the Kamaishi Mine (closed) in Iwate Prefecture, along with chalcopyrite, pyrrhotite, and cubite. Its English name comes from the Irish naturalist Joseph Barclay Pentland (1797-1873). [Akira Kato July 20, 2018] [References] | | | [Supplementary information] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
ニッケル・鉄の硫化鉱物の一つで、前者の重要な鉱石鉱物。一時硫鉄ニッケル鉱という名称もあったが、同じ成分で別鉱物のビオラル鉱violarite(化学式FeNi2S4)があるため、用いられなくなった。正マグマ性鉱床、接触交代鉱床(スカルン型鉱床)中などに産するが、鉱床学的に重要なものは前者である。自形は正八面体をなすが、非常にまれである。日本ではそのほとんどが顕微鏡的なもので、兵庫県大屋町(現、養父(やぶ)市大屋町)夏梅(なつめ)鉱山(閉山)では磁硫鉄鉱と共存して球状集合をなし、京都府大江町(現、福知山(ふくちやま)市大江町)河守(こうもり)鉱山(閉山)では硫化物のみからなる鉱脈中に黄銅鉱、磁硫鉄鉱などと共存する。岩手県釜石(かまいし)鉱山(閉山)でも黄銅鉱、磁硫鉄鉱、キューバ鉱などとともに産する。英名はアイルランドの自然科学者ペントランドJoseph Barclay Pentland(1797―1873)にちなむ。 [加藤 昭 2018年7月20日] [参照項目] | | | [補完資料] |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
>>: Penthouse (English spelling)
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