Synthesis, structure, and magnetic properties of the new ternary nitride BaHfN{sub 2} and of the BaHf{sub 1{minus}x}Zr{sub x}N{sub 2} solid solution
- Univ. of Nottingham (United Kingdom). Dept. of Chemistry
- Univ. of Birmingham, Edgbaston (United Kingdom)
The new ternary nitrides BaHf{sub 1{minus}x}Zr{sub x}N{sub 2} (0 {le} x {le} 1) have been synthesized by the solid state reaction of the binary nitrides Ba{sub 3}N{sub 2}, HfN, and ZrN and characterized by powder X-ray diffraction. The crystal structure of the end member, BaHfN{sub 2}, has been refined from powder data. The nitridohafnate crystallizes in the tetragonal space group P4/nmm (a = 4.1279(1) {angstrom}, c = 8,3816(4) {angstrom}, Z = 2) and is isostructural with the oxide KCoO{sub 2}. Hafnium is coordinated to five nitrogens in a distorted square base pyramidal geometry, forming layers of edge-sharing pyramids which stack along the c axis. Barium is situated between the Hf-N layers and is coordinated to five nitrogen atoms. Samples exhibit temperature-dependent paramagnetism between approximately 8 and 293 K and become superconducting below 8 K.
- OSTI ID:
- 642149
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 137; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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