Strukturverwandtschaft durch Streckung in Richtung von Symmetrieachsen
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Sven Hübner
Abstract
B.c.c., f.c.c., and related structures can be transformed into each other by positive or negative dilatation parallel to axes of symmetry. The tetragonal sub-group I/4mmm is common to the structures of protactinium, tungsten, metastable γ-manganese, copper, and indium, and the rhombohedral sub-group R3̅m to tungsten, β-polonium, α-polonium, α-mercury, and copper. Similarly, the structures of β-tin, silicon, cesium IV, and several not observed structural types are connected by the common sub-group I41/amd. These relationships are discussed with regard to the packing density and the coordination of the atoms. The influence of the packing density leads to better understanding phase transitions including nonmetal-metal transitions.
© 2003 Oldenbourg Wissenschaftsverlag GmbH
Artikel in diesem Heft
- Strukturverwandtschaft durch Streckung in Richtung von Symmetrieachsen
- Electron crystallography of zeolites. 2. Mordenite and the role of secondary scattering on structure determination
- Rietveld refinement of incommensurate low tridymite
- Crystal structure determination of systematically intergrown compounds: Li5(OH)2Br3 and Li2(OH)Br
- Wickenburgite, a double-layer silicate Pb3Al[6][Ca[6]Al[4]Si[4]10O27(H2O)3]·H2O: Crystal chemistry and thermal behaviour
- Natural and synthetic compounds with kröhnkite-type chains. An update
- Geometrical isomerism in uranyl chromates I. Crystal structures of (UO2)(CrO4)(H2O)2, [(UO2)(CrO4)(H2O)2](H2O) and [(UO2)(CrO4)(H2O)2]4(H2O)9
- Structure characterization of molecular complexes for non-linear optical materials I. X-ray analysis and AM1 calculations of 1 : 1 complexes of 8-hydroxiquinoline (1) and isonicotinamide (2) with 2,4,6-trinitrophenol
- The twinned and disordered crystal structure of tetrakis(triphenylphosphine)silver(I)bis(trifluoroacetato)triphenylstannate(IV)
Artikel in diesem Heft
- Strukturverwandtschaft durch Streckung in Richtung von Symmetrieachsen
- Electron crystallography of zeolites. 2. Mordenite and the role of secondary scattering on structure determination
- Rietveld refinement of incommensurate low tridymite
- Crystal structure determination of systematically intergrown compounds: Li5(OH)2Br3 and Li2(OH)Br
- Wickenburgite, a double-layer silicate Pb3Al[6][Ca[6]Al[4]Si[4]10O27(H2O)3]·H2O: Crystal chemistry and thermal behaviour
- Natural and synthetic compounds with kröhnkite-type chains. An update
- Geometrical isomerism in uranyl chromates I. Crystal structures of (UO2)(CrO4)(H2O)2, [(UO2)(CrO4)(H2O)2](H2O) and [(UO2)(CrO4)(H2O)2]4(H2O)9
- Structure characterization of molecular complexes for non-linear optical materials I. X-ray analysis and AM1 calculations of 1 : 1 complexes of 8-hydroxiquinoline (1) and isonicotinamide (2) with 2,4,6-trinitrophenol
- The twinned and disordered crystal structure of tetrakis(triphenylphosphine)silver(I)bis(trifluoroacetato)triphenylstannate(IV)
