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FeTiO3
Hexagonal
Ilmenite, an iron titanium oxide mineral, was reported from Sterling Hill by Palache (1935) and from Franklin by Frondel (1972). The menaccanite of Canfield (1889) is ilmenite. It is a very minor accessory mineral and of no economic significance.
Ilmenite occurs as euhedral, lustrous, opaque, black, hexagonal, 1-2 mm crystals, tabular on {001}, and with metallic luster. Few physical or chemical data have been obtained. Energy-dispersive X-ray analysis indicated major Fe and Ti and but a trace of Mn.
Ilmenite occurs in veinlets in the camptonite dikes which cut the Franklin orebody. The crystals are locally abundant within such seams and are associated with calcite and sphalerite. They are embedded in calcite and are exposed by dissolution of calcite in acid. Palache (1935) reported ilmenite from the hemimorphite deposits at Sterling Hill, but mentioned the presence of Ti and Mn “as well as of iron.” It is thus not certain if this material, not seen by this writer, is ilmenite or pyrophanite, which was later discovered there.
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| Copyright © 1995 by Pete J. Dunn |
Website
by Herb Yeates
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