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For the chemical composition.
Strictly, a Cr-bearing variety of spinel containing a (mostly large) proportion of Cr in substitution for Al. Also used informally for any Cr-rich mineral in the spinel group, e.g. chromite, magnesiochromite.

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References for Cr-spinelHide

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Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 692.
Osborne, M.D., Fleet, M.E., and Bancroft, G.M. (1981) Fe 2+ - Fe 3+ ordering in chromite and Cr-bearing spinels. Contributions to Mineralogy and Petrology: 77: 251-255.
Votyakov, S.L., Chashchukhin, I.S., Uimin, S.G., and Bykov, V.N. (1998) Oxygen thermometry and barometry of chromite-bearing ultramafic rocks, examples from the South Urals: I. Mössbauer Spectroscopy of chrome spinels and the problems of olivine-spinel thermometry. Geochemistry International: 36: 706-716.
Quintiliani, M., Andreozzi, G.B., and Graziani, G. (2006) Fe 2+ and Fe 3+ quantification by different approaches and fO2 estimation for Alabanian Cr-spinels. American Mineralogist: 91: 907-916.

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