manganIc

[Eng. mang an ( ese ); -ic.] Obtained from manganese (q. v.). IMG:content-0897.png:[blocks in formation] Min .: An orthorhombic mineral occurring in crystals longitudinally striated. Crystals sometimes twinned. Hardne , 40; specific gravity, 42-44; luster, sub-metallic; color, dark steel-gray to iron black; streak, reddish-brown, opaque, though some times translucent in thin splinters. Composition: Sesquioxide of manganese, 89.8; water, 102; corresponding with the formula Mn2O3HO. Occurs in meta lifer ous veins in many parts of the world, the finest crystallized specimens, however, having been found in veins traversing felsite at Ilfeld, Hartz, Germany. măn-gā-ni-ŭm, 8. [MANGANESIUM.] măn-gan-o-, pref. [MANGANESE.] măn-gạn-ở-căl-çite, s. [Pref. manga no =, and Eng. calcite; Ger. manga no cal cit.] Mineralogy : 1. A mineral occurring in rhombic prisms and sheaf-like groups of crystals, also diverging, and resembling aragonite (q.v.). Hardne , 4-5; specific gravity, 3037: luster, vitreous; color, flesh-red to white faintly tinged with red; streak, colorle . Composition: A carbonate of manganese, with carbonates of lime, magnesia, and iron. Found at Schemnitz, Hungary. 2. A variety of calcite (q. v.), containing variable amounts of carbonate of manganese.