The results of the study of some peculiarities in the pseudosymmetry of sphalerite-type structure crystals are re-ported. General behaviour patterns have been revealed in the invariance degree of the electron density relative to the inversion (pseudoinversion) operation in sphalerite-type structure crystals. In the dot model approximation, the lower bound (equal to 0.8) has been found of the pseudoinversion maximum value in sphalerite-type structure crystals and the conclusion on their pseudosymmetry has been made.
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