Abstract
Single crystals of a new quaternary oxide, barium hexadecayttrium tetrasilicon tritriacontaoxide, BaY16Si4O33, were obtained from a melt-solidified sample prepared by heating a mixture of BaCO3, Y2O3, and SiO2 at 2073 K. X-ray crystal structure analysis revealed that Ba(SiO4)4 orthosilicate clusters in which a Ba atom is surrounded by four SiO4 tetrahedra were isolated in a framework composed of Y and O in the structure of BaY16Si4O33. The dielectric constant measured for polycrystalline ceramics of BaY16Si4O33 sintered at 1953 K was 13 (298 K, 1 MHz), and the thermal expansion coefficient was 8.70 × 10 -6 K-1 (298-873 K), which are close to the values previously reported for Y2O3.
Original language | English |
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Pages (from-to) | 1249-1252 |
Number of pages | 4 |
Journal | Acta Crystallographica Section E: Crystallographic Communications |
Volume | 78 |
DOIs | |
State | Published - Nov 30 2022 |
Bibliographical note
Publisher Copyright:© 2022 International Union of Crystallography. All rights reserved.
Keywords
- barium yttrium silicon oxide
- crystal structure
- dielectric properties
- orthosilicate
- thermal expansion
ASJC Scopus subject areas
- Chemistry (all)
- Materials Science (all)
- Condensed Matter Physics