It is a variety of barite containing small amounts of lead, native to Beitou Hot Springs in the suburbs of Taipei City, Taiwan, and is radioactive due to its trace amounts of radium. It was named by mineralogist Jimbo Kotora in 1913 (Taisho 2), and was initially treated as a new mineral, but is no longer recognized as an independent species. It is light brown in color and occurs in a powder form or as a fairly coarse aggregate. Similar species have been discovered in Tamagawa Hot Springs in Akita Prefecture, but the lead content is lower than that of the species in its native area. [Akira Kato] [Reference items] | | | | | |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
台湾、台北市郊外北投温泉原産の少量の鉛などを含む重晶石の一変種で、微量のラジウムを含むため放射能を有する。1913年(大正2)鉱物学者神保小虎(じんぼことら)によって命名され、最初は新鉱物の取扱いを受けていたが、現在は独立種として認められていない。淡褐色で粉末状からかなり粗粒の集合体として産する。同類のものは秋田県玉川温泉などから発見されているが、原産地のものに比べて鉛の含量は低い。 [加藤 昭] [参照項目] | | | | | |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 |
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