Definitions
Century Dictionary and Cyclopedia
- n. Iron sesquioxid in isometric crystals, probably pseudomorph after magnetite. It occurs occasionally on a large scale, as in the Lake Superior iron region and the Cerro de Mercado in Mexico.
Wiktionary
- n. geology , (mineralogy) A variety of hematite that is pseudomorphic after magnetite crystals.
GNU Webster's 1913
- n. (Min.) Iron sesquioxide in isometric form, probably a pseudomorph after magnetite.
Examples
“Various analyses of this "martite" ore show from forty-four to sixty-eight per cent. of iron, and very low in both sulphur and phosphorus.”
“Messrs. Witherbee, Sherman & Company exhibited a series of ores and concentrates from Mineville, the Arnold Mining Company, magnetites and martite from”
“The ore is mineralogically martite schist, and the enclosing rocks are grayish, greenish and pinkish siliceous schists, of probable eruptive origin.”
“The magnetite is variably altered to martite and shows a grainsize in the range 100-500um that forms 30-60% by volume of the rock.”
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