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crystal data
The cell dimensions of Mn5Si2 have been refined by least squares with the powder diffraction data of J. P. Sénateur (Thèse Doct. Sci. phys. Paris, 1967). Mn5Si2 is isotypic with the D phase (V26.5Fe44Si29.5), and is tetragonal, a = 8.9097 ± 2, c = 8.7153 ± 3 Å, 56 atoms per unit cell, space group P41212. The observed powder diffraction intensities are compared with those calculated for the refined crystal structure (C. B. Shoemaker & D. P. Shoemaker, Acta Cryst. to be published).