An electron and X-ray diffraction study of the compositely modulated barium nickel hollandite Bax(NixTi8—x)O16, 1.16 < x < 1.32, solid solution
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Melody L. Carter
Abstract
Hollandite samples, Bax(NixTi8—x)O16 (1.1 < x < 1.40) made by ceramic techniques, have been studied by electron and X-ray diffraction. As a result, the barium nickel hollandite system is described as a composite modulated single phase solid solution made up of mutually incommensurable (along b) framework and Ba ion sub-structures. The magnitude of the incommensurate primary modulation wave-vector when defined with respect to the framework sub-structure q = bBa* (measured directly from electron diffraction patterns (EDPs)) acts as a chemical ruler in that it is directly related to composition and given by x/2. The superspace group symmetry was found to be I′2/m(0, x/2, 0)1. Both the framework and the Ba sub-structures have the same I2/m average structure space group symmetry. The solid solution limits for Bax(NixTi8—x)O16 were found to correspond to 1.16 < x < 1.32 . These limits were found by calculating the lattice parameters of both the frame work and sub-lattice from the powder X-ray diffraction patterns.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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- X-ray diffuse scattering as precursor of incommensurate Peierls transitions in one-dimensional organic charge transfer conductors
- Incommensurate modulations made visible by the Maximum Entropy Method in superspace
- The study of incommensurate structures as a probe to reveal atomic interactions in crystals
- High temperature structures of LiKSO4 crystals: normal and incommensurate phases
- Incommensurate crystal structures in the elements at high pressure
- Structural phase transitions in iodine under high pressure
- Incommensurate crystal structure of LiCd4(VO4)3
- An electron and X-ray diffraction study of the compositely modulated barium nickel hollandite Bax(NixTi8—x)O16, 1.16 < x < 1.32, solid solution
- Book Reviews
- Books Received
Articles in the same Issue
- Self-reciprocal redundant vector stars
- Editorial: Incommensurate Crystallography of Modulated and Composite Crystals
- An elementary introduction to superspace crystallography
- Methods of structural analysis and computer program JANA2000
- Flexible phases, modulated structures and the transmission electron microscope
- X-ray diffuse scattering as precursor of incommensurate Peierls transitions in one-dimensional organic charge transfer conductors
- Incommensurate modulations made visible by the Maximum Entropy Method in superspace
- The study of incommensurate structures as a probe to reveal atomic interactions in crystals
- High temperature structures of LiKSO4 crystals: normal and incommensurate phases
- Incommensurate crystal structures in the elements at high pressure
- Structural phase transitions in iodine under high pressure
- Incommensurate crystal structure of LiCd4(VO4)3
- An electron and X-ray diffraction study of the compositely modulated barium nickel hollandite Bax(NixTi8—x)O16, 1.16 < x < 1.32, solid solution
- Book Reviews
- Books Received
