Hematophanite, a derivative of the perovskite structure
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چکیده
Hematophanite, ideally Pb~FeaOsC1, is tetragonal, space group P4mm, with a = 3'92 and c = 15"3I/~. The crystal structure, which has been refined to an R-factor of 9"t %, may be described as an interlayering of perovskite-like units with a cesium chloride or, alternatively, a nadoritelike unit. The nadorite-like part consists of a double layer of PbO4CI4 distorted square antiprisms. Iron atoms are in 6-fold (tetragonal bipyramidal) and 5-fold (square pyramidal) coordination.
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