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piedmontite
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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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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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manganese
manganese (ˈmæŋgəniːz) Also 7 manganes, 9 manganeze. [a. F. manganèse (16th c.), a. It. manganese, one of the many corrupt forms of L. magnēsia: see magnesia 2. The word appears in Ger. as mangan (hence Du. mangaan, Sw. mangan). Cf. obs. F. mangane.] 1. A black mineral (now recognized as an oxide of...
Oxford English Dictionary
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