Mangalam, R.V.K. ; Suard, E. ; Sundaresan, A. (2009) Crystal structure and dielectric properties of ordered perovskites Ba2BiSbO6 and BaSrBiSbO6 Physica B: Condensed Matter, 404 (1). pp. 154-157. ISSN 0921-4526
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Official URL: http://doi.org/10.1016/j.physb.2008.10.031
Related URL: http://dx.doi.org/10.1016/j.physb.2008.10.031
Abstract
Neutron powder diffraction studies showed that the ordered perovskites Ba2BiSbO6 (BBS) and BaSrBiSbO6 (BSBS) crystallize in a rhombohedral structure with the space group R3¯. The room-temperature lattice parameters are a=6.0351(2) Å; α=60.202(1)° and a=5.9809(2) Å; α=60.045(2)°, respectively. BBS exhibits a dielectric anomaly near room temperature which may be related to structural transition from the R3¯ to low-temperature monoclinic I2/m symmetry. BSBS shows a dielectric anomaly near 723 K which coincides with a phase transition from the rhombohedral to cubic (Fm3¯m) structure. In contrast to BBS, BSBS does not undergo structural transition below room temperature.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 120101 |
| Deposited On: | 22 Jun 2021 13:14 |
| Last Modified: | 22 Jun 2021 13:14 |
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