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Lepidolite is a lilac-gray or rose-colored member of the mica group with formula K(Li,Al,Rb)3(Al,Si)4O10(F,OH)2.〔〔 It is a secondary source of lithium. It is a phyllosilicate mineral〔Hurlbut, Cornelius S.; Klein, Cornelis (1985), ''Manual of Mineralogy,'' Wiley, (20th ed.) ISBN 0-471-80580-7〕 and a member of the polylithionite-trilithionite series.〔(Lepidolite on Mindat.org )〕 It is associated with other lithium-bearing minerals like spodumene in pegmatite bodies. It is one of the major sources of the rare alkali metals rubidium and caesium.〔H. Nechamkin, ''The Chemistry of the Elements'', McGraw-Hill, New York, 1968.〕 In 1861 Robert Bunsen and Gustav Kirchhoff extracted 150 kg of lepidolite and yielded a few grams of rubidium salts for analysis, and therefore discovered the new element rubidium. It occurs in granite pegmatites, in some high-temperature quartz veins, greisens and granites. Associated minerals include quartz, feldspar, spodumene, amblygonite, tourmaline, columbite, cassiterite, topaz and beryl.〔 Notable occurrences include Brazil; Ural Mountains, Russia; California, United States; Tanco Mine, Bernic Lake, Manitoba, Canada; and Madagascar. File:Lepidolite-140533.jpg|Yellow lepidolite from Itinga, Minas Gerais, Brazil. Size: 6.1 x 4.9 x 3.1 cm File:Lepidolite-208658.jpg|Lavender lepidolite "books" from Himalaya Mine, Mesa Grande District, San Diego County, California, USA. Size: 4.8 x 3.9 x 3.5 cm ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「lepidolite」の詳細全文を読む スポンサード リンク
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