ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Stabilization of Bi₂O₃ Polymorphs with Sm₂O₃ Doping

O. Turkoglu, F. Altiparmak, and I. Belenli

Department of Chemistry, Faculty of Arts and Sciences, Erciyes University, 38039 Kayseri, Turkey

E-mail: turkoglu@erciyes.edu.tr

Received: 5 June 2002

Abstract: The synthesis of bismuth trioxide polymorphs in the binary system (Bi₂O₃)_1−x(Sm₂O₃)_x in the range 0.01 ≤ x ≤ 0.1 has been investigated by adding small amounts of Sm₂O₃ into pure α- Bi₂O₃. The polymorphic changes, crystallographic properties, and Sm₂O₃ content dependence of the lattice parameters of the observed β- and δ-phases are reported. All the obtained solid solutions had nonstoichiometric compositions and nonstoichiometry increases with the increasing amount of mole % Sm₂O₃ addition. Because of nonstoichiometry, the produced phases have lattice defects. These defects are mainly oxygen ion vacancies.

Full paper in Portable Document Format: 575a304.pdf

Chemical Papers 57 (5) 304–308 (2003)