ON THE STRUCTURE OF SRZRO3

The structure of SrZrO3 was studied from room temperature up to 1373 K. It was found that there are only minor structural changes. At room temperature SrZrO3 was found to crystallize with either pseudocubic or orthorhombic symmetry, probably due to differences in preparation temperature and impurities. The sample studied could be indexed on the basis of a doubled cubic perovskite cell, witha = 0.8206(1)nm; the space group isP213. Around 1023 K there is a transformation to space groupP2/n3, witha = 0.8270(1)nm at 1063 K. Another, very smooth phase transformation, which probably results in space groupPm3m, starts around 1273 K, witha = 0.8287(2)nm at 1323 K. © 1992 Academic Press, Inc. All rights reserved.