jacobsite


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jacobsite

[′jā·kəb‚zīt]
(mineralogy)
MnFe2O4 A black magnetic mineral composed of an oxide of manganese and iron; a member of the magnetite series.
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Dongri Buzurg Pyrolusite, Psilomelane, Jacobsite, Hematite, Goethite, Feldspar and Quartz 5.
Associated minerals are: jacobsite, kutnohorite, barite, tephroite and spessartine.
4]) and low contents of Mn, Mg, Al, thus forming very low proportions of jacobsite, magnesioferrite, and hercynite, respectively, and sometimes V.