In this study we attempt to distinguish the relationship between
the altered chromites and non-altered ones by X-ray diffraction. For the
purpose of this study, an assemblage of altered/non-altered and
deformed/non-deformed ophiolitic chromites has been collected and
analyzied. Sharp and doubled peaks are resulted from non-altered and altered
samples respectively. By using XRD studies, the parameter “a” from
chromite grains has been calculated and the composition of same samples,
obtaining from microprobe analysis, have given a chart that is useful for
semi-qualitative recalculation of chromites composition.