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n.1.(Min.) A ferruginous variety of shalerite or zinc blende, nearly black in color.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
When iron content is high it is an opaque black variety, marmatite. It is usually found in association with galena, pyrite, and other sulfides along with calcite, dolomite.
Specific topics include a transmission pricing method considering long-term capacity cost, annual variations of major nutrients and assessing their environmental impacts in Xiangshan Bay in the East China Sea, the effect of freeze-thaw actions on phosphorus adsorption and desorption in forest wetland soils at high latitudes, assessing seismic damage to urban water supply pipelines, the flotation of indium-beard marmatite in the low alkali conditions, and the sweep efficiency of viscoelastic polymer solution.
Fang, "Bioleaching of marmatite flotation concentrate by Acidithiobacillus ferrooxidans" Hydrometallurgy, vol.