Crystallochemical data for the Ho2SrAl2O7 oxide at 100, 293, and 673 K were obtained by full-profile X-ray analysis. Analysis of the thermal expansion anisotropy showed that increased temperature gives rise to equalization of metal-oxygen bond lengths in all oxygen polyhedra at the expense of lengthening of some bonds and virtual invariability of others.
Zvereva, I. A., Smirnov, Y. E., & Palstra, T. (2005). Cation distribution and interatomic interactions in oxides with heterovalent isomorphism: X. Structure of the Ho2SrAl2O7 oxide at 100, 298, and 673 K. Russian Journal of General Chemistry, 76(3), 335-339. https://doi.org/10.1134/S1070363206030017