Bog Manganese

bog manganese

[′bäg ′maŋ·gə‚nēs]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Bog Manganese


a highly dispersed mineral substance consisting of MnO2·n H2O and other hydroxides of manganese. It goes by various names, including earthy manganese and wad. Depending on the impurities it contains, bog manganese is divided into a number of varieties, including lampadite, containing CuO; tunnerite, containing ZnO; and asbolites, containing CoO + NiO.

Bog manganese forms powdery, contaminating masses, incrustations, dendritic films, and concretions. It is black or blackish-brown in color. Its density is 2, 800 to 4, 400 kg/m3; its hardness on the mineralogical scale is 1-4.

Bog manganese is widespread in nature as a product of the weathering of various manganese-containing minerals. It forms part of the composition of sedimentary manganese ores; it is formed in the benthic marine and lacustrine sediments. It is used as an ore along with other manganese minerals.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.