Silicates and Perovskites: Two Themes with Variations

✍ Scribed by Friedrich Liebau

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 124 KB
• Volume: 38
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/(sici)1521-3773(19990614)38:12<1733::aid-anie1733>3.0.co;2-5

✦ Synopsis

An intermediate position between oxosilicates and nitridosilicates on one side and silicates and silicon oxo salts on the other is taken up by Ce Si O N . This compound is a perovskite derivative in which the octahedrally coordinated cations have been extensively replaced by tetrahedrally coordinated cations to give the formula Ce (Si Si □)(O N □ ) ( =coordination number, □=lattice vacancy). The presence of vacancies in both the cation and the anion sublattices leads to expectations of ionic conductivity.