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598-62-9 manganese spar

Synonyms manganous carbonate manganese spar rhodochrosite Occurrence and Uses... [Pg.543]

Manganese(II) carbonate occurs in nature as the mineral rhodochrosite [14476-12-1] (manganese spar). This ore also is used to produce manganese dioxide (by electrolytic process). The pure compound is used as gemstones and as a pigment (manganese white). [Pg.543]

Manganese is extracted from pyrolusite (Mn02), braunite (MnjOs), hausmannite (Mn304), and rho-dochromite (MnCOs, manganese spar). [Pg.318]

Yellow ochres are earths composed essentially of clay coloured by hydrated ferric oxide they may contain siliceous sand, calcium carbonate, small proportions of manganese oxides, and sometimes basic ferric sulphate and calcium and barium sulphates. Chalk, gypsum and heavy spar may be added fraudulently and the colour may be " improved by artificial organic dyes, vegetable colours or chrome yellow. [Pg.383]

See other pages where 598-62-9 manganese spar is mentioned: [Pg.389]    [Pg.389]    [Pg.389]    [Pg.389]    [Pg.207]    [Pg.688]    [Pg.562]    [Pg.207]    [Pg.1167]    [Pg.263]    [Pg.286]    [Pg.446]    [Pg.118]    [Pg.300]    [Pg.594]    [Pg.363]    [Pg.346]    [Pg.71]    [Pg.674]    [Pg.212]    [Pg.297]    [Pg.582]   
See also in sourсe #XX -- [ Pg.9 , Pg.543 ]



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