Figure 1
An ORTEP-3 (Farrugia, 1997) plot of the chromite structure from Piumhi. T (large ellipsoid with boundary) represents the tetrahedral site containing the Fe2+, Mg2+ and Al3+ ions. M (large ellipsoid with shading) represents the octahedral site containing the Cr3+, Fe3+ and Al3+ ions. The ellipsoids are drawn at the 50% probability level. [Symmetry code: (i) x, y − , z − .] |