High-Pressure Synthesis of LaMS3(M=Ti, V, Cr)
β Scribed by S. Kikkawa; Y. Fujii; Y. Miyamoto; F. Kanamaru; A. Meerschaut; A. Lafond; J. Rouxel
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 265 KB
- Volume
- 139
- Category
- Article
- ISSN
- 0022-4596
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β¦ Synopsis
New compounds LaMS 3 with NH 4 CdCl 3 -type crystal structure could be prepared by high-pressure synthesis where M β«Ψβ¬ Ti, V, Cr. The high-pressure compounds were obtained above 2.5 GPa at 1375 K for M β«Ψβ¬Cr, above 3.5 GPa at 1375 K for M β«Ψβ¬ Ti, and above 5 GPa at 1475 K for M β«Ψβ¬ V, respectively. The crystal structure of LaCrS 3 was refined as NH 4 CdCl 3 -type structure. It has an orthorhombic crystal lattice (Pnma) with a β«Ψβ¬ 0.787(1), b β«Ψβ¬ 0.3851(7), and c β«Ψβ¬ 1.334(2) nm. The polycrystalline product of LaCrS 3 was semiconducting and antiferromagnetic with T N β«Ψβ¬ 195 K and eff β«Ψβ¬ 3.83 B .
π SIMILAR VOLUMES
cations, respectively. So, A 2 FeSbO 6 , where A is Sr, Ca, Conditions for formation of a synthetic analog of the natural are perovskites (2), Mn 2 FeSbO 6 is ilmenite (3), and mineral melanostibite with the composition Mn 2 FeSbO 6 which Cu 2 FeSbO 6 is bixbyite (C-type) (4). The reason for morcrys