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Axinite is a brown to violet-brown, or reddish-brown bladed group of minerals composed of calcium aluminium boro-silicate, (Ca,Fe,Mn)3Al2BO3Si4O12OH. Axinite is pyroelectric and piezoelectric. The axinite group includes: *Axinite-(Fe) or ferroaxinite, Ca2Fe2+Al2BOSi4O15(OH) iron rich, clove-brown, brown, plum-blue, pearl-gray 〔(Handbook of Mineralogy: Ferroaxinite )〕 *Axinite-(Mg) or magnesioaxinite, Ca2MgAl2BOSi4O15(OH) magnesium rich, pale blue to pale violet; light brown to light pink 〔( Handbook of Mineralogy: Magnesioaxinite )〕 *Axinite-(Mn) or manganaxinite, Ca2Mn2+Al2BOSi4O15(OH) manganese rich, honey-yellow, clove-brown, brown to blue 〔(Handbook of Mineralogy: Manganaxinite )〕 *Tinzenite, (CaFe2+Mn2+)3Al2BOSi4O15(OH) iron – manganese intermediate, yellow, brownish yellow-green〔(Handbook of Mineralogy: Tinzenite )〕 ==Gallery== File:Axinite-64246.jpg|Clove-brown axinite crystals to 2.3 cm set atop matrix from the West Bor Pit at Dalnegorsk, Russia File:Axinite-60191.jpg|Chloritized bladed crystals of Axinite forming on Adularia from the Swiss Alps File:Tinzenite-Calcite-172430.jpg|Tinzenite on Calcite, 4.5 x 3.5 x 3 cm. Wessels Mine, Kalahari manganese fields, Northern Cape Province, South Africa File:Axinite-(Mn)-239862.jpg|Manganaxinite (Axinite-(Mn)), with sharp curving crystals to 4 cm. West Bor Pit at Dalnegorsk, Russia File:Axinit-G-EmpireTheWorldOfGems.jpg|faceted axinite, 1.02ct, Brazil 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「Axinite」の詳細全文を読む スポンサード リンク
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