maghemite

[mag-hem-ahyt, mag-uh-mahyt]
noun Mineralogy.
a strongly magnetic dimorph of hematite.

Origin:
1925–30; blend of magnetite and hematite

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Britannica
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maghemite

an iron oxide mineral. It has a composition close to ferric oxide (Fe2O3) and exhibits strong magnetism and remanence. Its structure is isometric, of defective spinel form, and somewhat iron-deficient. Maghemite is metastable with respect to hematite and forms a continuous metastable solid solution with magnetite; titanium can substitute for iron, giving rise to titanomaghemite. Natural maghemite forms by oxidation of magnetite. Synthetic maghemite, produced by dehydrating lepidocrocite or oxidizing magnetite at a low temperature, is used as a magnetic-recording medium

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Notably absent was maghemite, which was abundant on the cyclic corrosion test coupons.
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