Role of Twinning in Perovskite-Lithium Niobate Phase Transitions.
-
- Prewitt Charles T.
- Geophysical Laboratory and Center for High Pressure Research
-
- Ko Taegyung
- Dept. of Ceramic Engineering, Inha University
-
- Shen Guoyin
- GSECARS, University of Chicago
-
- Gerald John D. Fitz
- Research School of Earth Sciences, Australian National University
Bibliographic Information
- Other Title
-
- Role of Twinning in Perovskite-Lithium
Search this article
Abstract
A number of ABO3 compounds having the ilmenite structure at low pressures have been shown to transform to the orthorhombic perovskite structure at high pressures and temperatures. The compounds that exhibit this behavior contain cations having a relatively restricted range of radii and radius ratios, and include MnTiO3, FeTiO3, MgTiO3, MgGeO3, and MnSnO3. In addition, two silicates with mixed cation content show similar behavior. When these materials are quenched to ambient conditions, the products often are twinned crystals having the LiNbO3 structure. It was thought originally that twinning was required in this transition, but examination of TEM photographs indicates the presence of untwinned regions of the LiNbO3-type phase. However, this structure appears to be metastable with respect to ilmenite. A2O3 compounds such as Fe2O3 also transform similarly to the perovskite structure at high pressures and temperatures, but the intermediate metastable form is different from the ABO3 type. It has been predicted that this could be the Rh2O3 II structure.
Journal
-
- The Review of High Pressure Science and Technology
-
The Review of High Pressure Science and Technology 7 40-43, 1998
The Japan Society of High Pressure Science and Technology
- Tweet
Details 詳細情報について
-
- CRID
- 1390001204381773440
-
- NII Article ID
- 10002688678
-
- NII Book ID
- AN10452913
-
- ISSN
- 13481940
- 0917639X
-
- NDL BIB ID
- 4493831
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed