The analysis of incommensurate structures in terms of full space group theory, and the application of the method to melilite
Abstract
This paper deals with the application of full group theoretical methods to the elucidation of the symmetry and structure of an incommensurate phase. The analysis shows that the full symmetry and structure of the incommensurate phase can be determined unequivocably where certain minimal symmetry data are available. The theory is compared with existing methods used in the study of incommensurate structures, and is applied to the elucidation of the incommensurate structure of melilite. The analysis demonstrates that there are two symmetrically distinct distortions of the Z tetrahedral site in melilite which, when it contains Fe, is responsible for two quite independent MÖssbauer signatures.
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Articles in the same Issue
- The first successful crystallization of a prokaryotic extremely thermophilic outer surface layer glycoprotein
- Rietveld refinement with wavelet compressed data sets
- 4-Connected nets of packings of non-convex parallelohedra and related simple polyhedra
- Structure maps for close-packed alloys by the Ising model
- The analysis of incommensurate structures in terms of full space group theory, and the application of the method to melilite
- The crystal structure of kastningite (Mn, Fe, Mg) (H2O)4[Al2(OH)2(H2O)2(PO4)2] · 2 H2O – a new hydroxyl aquated orthophosphate hydrate mineral
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- Molecular and crystal structure of hexa(phenylthio)-1,3-butadiene at 87 K
- The low-temperature structures of bicyclo[3.3.1]nonan-9-one and 3-azabicyclo[3.2.2]nonane
- Structural diversity in mercury(II) bis (O-alkyldithiocarbonate) compounds
- The crystal structure of pentaaquabis(2,4-dinitrophenolato)barium(II)
- Solid-state structure of [K(dioxane)2PPh2]n: Formation of a three-dimensional network via anion-cation-interaction
