Silver-ion-exchanged lithium tantalate: High-resolution electron microscopic studies of intergrowth defect structures
- 1 January 1988
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 77 (1) , 69-80
- https://doi.org/10.1080/00150198808223228
Abstract
High-resolution electron microscopy reveals the microdomain structure of Ag-ion-exchanged LiTaO3. At least three distinct pervoskite-related structures (Li1-xAgxTaO3; 0 ≤ x ≤ 1) (space groups Pnma, Im3 and R3c) coexist with each other, or with LiTaO3 and AgTaO3, depending on the duration of ion-exchange in molten AgNO3. The images also reveal that the exchange takes place via medium of chemically-induced microtwinning, whereby the Ag atoms may replace Li and occupy sites of larger coordination polyhedra at the twin planes. This mechanism is preferred kinetically over a strictly regimented, coherent, topotactic dilatory-type transformation.Keywords
This publication has 8 references indexed in Scilit:
- Silver ion-exchanged lithium tantalate Li1-xAgxTaO3: Identification of perovskite-related phases by electron diffractionFerroelectrics, 1987
- Chemical twinning and ferroelectric domains in LiTaO3Philosophical Magazine A, 1982
- High-resolution study of ferroelectric domain boundaries in lithium tantalatePhilosophical Magazine A, 1982
- Some structures topologically related to cubic perovskite (E21), ReO3 (D09) and Cu3Au (L12)Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1977
- Twinning on the unit cell level as a structure-building operation in the solid stateJournal of Solid State Chemistry, 1974
- On the relation between molybdenum trioxide and rhenium trioxide type crystal structuresActa Crystallographica Section A, 1973
- The classification of tilted octahedra in perovskitesActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1972
- A note on the structure of lithium niobate, LiNbO3Acta Crystallographica Section A, 1968