The Decomposition and Analysis of Chrome Spinel. A Survey of Some Published Techniques

K. A. Rodgers
Geology Department, University of Auckland, New Zealand

Summary: Examination of published procedures for the decomposition and subsequent analysis of chromite and chrome ores shows some to be unnecessarily complicated and time consuming. Others fail to yield consistent and reproducible results. Decomposition is rapidly and effectively accomplished using the peroxide frit technique of Rafter. Chromium may then be removed and determined volumetrically allowing the rest of the analysis to proceed along conventional silicate lines. Fe2+ is determined by oxidimetry following digestion with a mixture of phosphoric and sulphuric acids in the presence of ceric sulphate.

Mineralogical Magazine; September 1972 v. 38; no. 299; p. 882-889; DOI: 10.1180/minmag.1972.038.299.12
© 1972, The Mineralogical Society
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