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ChemInform Abstract: Synthesis, Structure, and Magnetic Properties of NaTiO2.

✍ Scribed by S. J. CLARKE; A. J. FOWKES; A. HARRISON; R. M. IBBERSON; M. J. ROSSEINSKY

Publisher
John Wiley and Sons
Year
2010
Weight
39 KB
Volume
29
Category
Article
ISSN
0931-7597

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✦ Synopsis

Synthesis, Structure, and Magnetic Properties of NaTiO 2 .

-Oxides with nominal composition NaTiO 2 are prepared and their properties are discussed. Na 0.99 TiO 2 is analyzed with powder XRD and has a hexagonal room temp. structure (Ξ±-NaFeO 2 -type, space group Rr3rm, Z = 3) having hexagonal lattice parameters. At 5 K the structure is monoclinic (space group C2/m, Z = 2). This transition is responsible for the change in magnetic susceptibility between 200 and 250 K which is 4.7β€’10 -4 emu/mol and falls to less than 60% at low temperatures. The structural phase transition is apparently driven by an increase in Ti-Ti bonding on cooling and can be interpreted as a cooperative second-order Jahn-Teller distortion. -(CLARKE, S.

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