Structural studies of magnesium nitride fluorides by powder neutron diffraction |
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| Authors: | Michael A Brogan Robert W Hughes Ronald I Smith Duncan H Gregory |
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| Institution: | 1. School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom;2. WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ, United Kingdom;3. ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, United Kingdom |
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| Abstract: | Samples of ternary nitride fluorides, Mg3NF3 and Mg2NF have been prepared by solid state reaction of Mg3N2 and MgF2 at 1323–1423 K and investigated by powder X-ray and powder neutron diffraction techniques. Mg3NF3 is cubic (space group: Pm3m) and has a structure related to rock-salt MgO, but with one cation site vacant. Mg2NF is tetragonal (space group: I41/amd) and has an anti-LiFeO2 related structure. Both compounds are essentially ionic and form structures in which nitride and fluoride anions are crystallographically ordered. The nitride fluorides show temperature independent paramagnetic behaviour between 5 and 300 K. |
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