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Crystal and magnetic structures of antiferromagnetic Mn 2 N were studied by means of neutron diffraction at 290°K, 230°K, and 120°K. An orthorhombic arrangement of nitrogen atoms in the octahedral interstices of hcp manganese lattice was found. The crystal structure is ζ-Fe 2 N type whose space group is D 2 h 14 - P b n a . The intensity analysis of the diffraction pattern at 120°K yields a magnetic structure with four sublattices having the same orthorhombic unit cell as the chemical one. The magnetic moment of manganese atom was found to be 1.4±0.4µ B at 230°K and 1.6±0.4µ B at 120°K.
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Mekata et al. (1968) studied this question.
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