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Neutron powder diffraction patterns are measured at 50°C and liquid nitrogen temperature. The crystal structure is defined as D88 (space group P63/mcm), in agreement with CASTELLIZ's data [2]. It is found that the atoms in the 4 (d) and 6 (g) positions have magnetic moments of (3 ± 0.1) and (2 ± 0.1) Bohr magnetons, respectively. The spin direction is parallel to the [0001] axis.
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R. Ciszewski (1963) studied this question.
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