The Crystal Structure and Ionic Conductivity of the Ilmenite Polymorph of NaSbO3

✍ Scribed by B. Wang; S.C. Chen; M. Greenblatt

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 223 KB
• Volume: 108
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1994.1028

✦ Synopsis

Single crystals of (\mathrm{NaSbO}{3}) with the ilmenite structure have been grown. The crystal structure has been determined by single crystal X-ray diffraction measurement. The ilmenite phase of (\mathrm{NaSbO}{3}) crystallizes in the trigonal system with hexagonal symmetry, space grmip (R \overline{3}(N o). 148), and (Z=6). The hexagonal enit cell parameters arc (a=5.2901(3) \AA, c=15.926(2) \AA), and (V=385.98) (4) (\AA^{3}). The structure of ilmenite (\mathrm{NaSbO}{3}) is built up from layers of edgesharing (\mathrm{SbO}{6}) octahedra with sodium ions located between the layers in octahedral sites. The ionic conductivity of the ilmenite analog of (\mathrm{NaSbO}_{3}) was investigated by ac complex impedance measurements and the results are discussed in terms of the structural dimensionality, the (\mathrm{Na}^{+})-oxygen bond strength, the sodium occupancy, and the bottleneck size. (1994 Academic Press. Inc.