Donnees cristallographiques sur une nouvelle serie de manganites mixtes de terre rare et d'alcalino-terreux
Abstract
The synthesis of two new series of oxides: Ba Ln2Mn 2O 7 and Sr Ln2Fe 2O 7, where Ln is a rare earth, was performed. The experimental conditions are given along with some crystal data. The diffraction patterns show a close resemblance with those of the double-perovskite-block compounds Ba Ln2Fe 2O 7 and Sr Ln2Fe 2O 7. However, the {c}/{a} ratio of the tetragonal cell is somewhat larger for the manganese compounds than for the iron compounds, due to a Jahn-Teller distortion of the Mn 3+O 6 octahedral sites.
- Publication:
-
Journal of Solid State Chemistry France
- Pub Date:
- November 1981
- DOI:
- 10.1016/0022-4596(81)90354-6
- Bibcode:
- 1981JSSCh..40...14C