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Manganesium :: Manganesium (n.) Manganese.

Manganous :: Manganous (a.) Of, pertaining to, designating, those compounds of manganese in which the element has a lower valence as contrasted with manganic compounds; as, manganous oxide..

Helvite :: Helvite (n.) A mineral of a yellowish color, consisting chiefly of silica, glucina, manganese, and iron, with a little sulphur..

Manganite :: Manganite (n.) A compound of manganese dioxide with a metallic oxide; so called as though derived from the hypothetical manganous acid.

Karpholite :: Karpholite (n.) A fibrous mineral occurring in tufts of a straw-yellow color. It is a hydrous silicate of alumina and manganese.

Rhodonite :: Rhodonite (n.) Manganese spar, or silicate of manganese, a mineral occuring crystallised and in rose-red masses. It is often used as an ornamental stone..

Epidote :: Epidote (n.) A mineral, commonly of a yellowish green (pistachio) color, occurring granular, massive, columnar, and in monoclinic crystals. It is a silicate of alumina, lime, and oxide of iron, or manganese..

Weldon''s Process :: Weldon's process () A process for the recovery or regeneration of manganese dioxide in the manufacture of chlorine, by means of milk of lime and the oxygen of the air; -- so called after the inventor..

Pyrosmalite :: Pyrosmalite (n.) A mineral, usually of a pale brown or of a gray or grayish green color, consisting chiefly of the hydrous silicate of iron and manganese; -- so called from the odor given off before the blowpipe..

Columbite :: Columbite (n.) A mineral of a black color, submetallic luster, and high specific specific gravity. It is a niobate (or columbate) of iron and manganese, containing tantalate of iron; -- first found in New England..

Babingtonite :: Babingtonite (n.) A mineral occurring in triclinic crystals approaching pyroxene in angle, and of a greenish black color. It is a silicate of iron, manganese, and lime..

Tephroite :: Tephroite (n.) A silicate of manganese of an ash-gray color.

Danalite :: Danalite (n.) A mineral occuring in octahedral crystals, also massive, of a reddish color. It is a silicate of iron, zinc manganese, and glucinum, containing sulphur..

Eosphorite :: Eosphorite (n.) A hydrous phosphate of alumina and manganese. It is generally of a rose-pink color, -- whence the name..

Rhodochrosite :: Rhodochrosite (n.) Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also dialogite..

Manganese :: Manganese (n.) An element obtained by reduction of its oxide, as a hard, grayish white metal, fusible with difficulty, but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic weight 54.8..

Sienna :: Sienna (n.) Clay that is colored red or brown by the oxides of iron or manganese, and used as a pigment. It is used either in the raw state or burnt..

Manganiferous :: Manganiferous (a.) Containing manganese.

Willemite :: Willemite (n.) A silicate of zinc, usually occurring massive and of a greenish yellow color, also in reddish crystals (troostite) containing manganese..

Hauerite :: Hauerite (n.) Native sulphide of manganese a reddish brown or brownish black mineral.

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