piemontite

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piemontite
piemontite Min. (ˈpiːmɒntaɪt) [ad. G. piemontit (G. A. Kenngott Das Mohs'sche Mineralsystem (1853) 75), f. Piedmont (It. Piemonte, lit. Mountain-foot), its locality + -ite 2 b.] A brownish red or reddish black silicate of aluminium, iron, manganese, and calcium, resembling epidote; often called mang... Oxford English Dictionary
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Piemontite
Piemontite is a sorosilicate mineral in the monoclinic crystal system with the chemical formula . It is a member of the epidote group. Red to reddish-brown or red-black in color, Piemontite has a red streak and a vitreous lustre. Manganese (Mn3+) causes the red color. wikipedia.org
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piedmontite
piedmontite Min. (ˈpiːdmɒntaɪt, ˈpjeːm-) [Alteration (by J. D. Dana) of G. piemontit: see piemontite.] = piemontite.1854 Dana Min. Index, Piedmontite. 1894 Min. Mag. X. 261 In the rhyolites the manganese-epidote, Piedmontite, is widely distributed. 1933 Mineral. Mag. XXIII. 417 The pleochroic colour... Oxford English Dictionary
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Epidote
Belonging to the same isomorphous group with epidote are the REE-rich allanite (containing primarily lanthanum, cerium, and yttrium), and the manganese-rich piemontite Piemontite occurs as small, reddish-black, monoclinic crystals in the manganese mines at San Marcel, near Ivrea in Piedmont, and in crystalline schists wikipedia.org
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List of gemstones by species
Diaspore Dickinsonite Diopside Dioptase Dolomite Dumortierite Ekanite Elbaite Emerald Trapiche emerald () Enstatite Bronzite Hypersthene Eosphorite Epidote Piemontite Pectolite Larimar Pentlandite Peridot Periclase Perthite Petalite (castorite) Pezzottaite Phenakite Phlogopite Phosgenite Phosphophyllite Phosphosiderite Piemontite wikipedia.org
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List of minerals recognized by the International Mineralogical Association (P–Q)
(IUPAC: calcium [metal] (dialuminiium manganese(III)) heptaoxodisilicate tetraoxosilicate oxyhydroxyl) Piemontite-(Pb) (IMA2011-087) 9.BG. [no] Piemontite-(Sr) (IMA1989-031) 9.BG. wikipedia.org
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Classification of silicate minerals
Carboirite-VIII Subclass '9.B': sorosilicates Epidote supergroup, Epidote group Clinozoisite , Niigataite , Epidote , Hancockite , Mukhinite , Piemontite , Piemontite-(Sr) , Tweddillite Allanite group Allanite-(Ce) , Allanite-(La) , Allanite-(Y) , Dissakisite-(Ce) , Dissakisite-(La) , Ferriallanite-( wikipedia.org
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矿物列表
Allanite-(Ce)) (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH)) 58.2.1a.4 斜黝帘石(Clinozoisite)-Ca2Al3(SiO4)3(OH) 58.2.1a.7 绿帘石(Epidote)-Ca2(Fe,Al)3(SiO4)3(OH) 58.2.1a.11 红帘石(Piemontite wikipedia.org
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