MSn and MSnO3 (M = Ca, Sr, Ba): New Examples of Oxygen-Stuffed Alloys

✍ Scribed by L.A. Martinez-Cruz; A. Ramos-Gallardo; A. Vegas

• Book ID: 102605581
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 108 KB
• Volume: 110
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1994.1186

✦ Synopsis

The normal pressure phases of (M \mathrm{Sn}(M=\mathrm{Ca}, \mathrm{Sr}, \mathrm{Ba})) involve structures of the (\mathrm{CrB}) type which are related to their respective bcc- (M) nets. At high pressure they undergo a transition to the (\mathrm{CsCl}) type, which is just the array of (M \mathrm{Sn}) cations in (\mathrm{MSnO}{3}) perovskites. In hp-BaSn and (\mathrm{BaSnO}{3}) the coincidence is not only in topology but also in the unit cell parameters ((a=4.10) and (4.05 \AA), respectively) such that (\mathrm{BaSnO}_{3}) can be considered as a real BaSn stuffed alloy in which oxygen and high pressure seem to have the same effect on the MSn arrangement. (19 1994 Academic Press, Inc.