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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.
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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
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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
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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.
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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-(
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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
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