ORDERING OF THE OCTAHEDRALLY COÖRDINATED CATION POSITION IN THE PEROVSKITE STRUCTURE

✍ Scribed by Galasso, Francis; Darby, Wilda

• Book ID: 126193161
• Publisher: American Chemical Society
• Year: 1962
• Tongue: English
• Weight: 263 KB
• Volume: 66
• Category: Article
• ISSN: 0022-3654
• DOI: 10.1021/j100807a028

✦ Synopsis

An X-ray analysis of compounds with the general formula Ba(M3+0.&b5+~.~)0~, where R P + is a rare earth, indium or iron ion, has shown that the critical percentage difference in radii necessary for ordering of the ME+ and niobium ions in the B sites of the perovskite structure lies between 7 and 17%. Of significance, this value found for ordering encompasses the 15% which has been used as an indication of the maximum percentage difference in the sizes of atoms or ions involved in either solid solution formation or isomorphous substitution.