Syntheses, crystal and electronic structures of three new potassium cadmium(II)/zinc(II) tellurides: K{sub 2}Cd{sub 2}Te{sub 3}, K{sub 6}CdTe{sub 4} and K{sub 2}ZnTe{sub 2}
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 (China)
Three new ternary potassium(I) zinc(II) or cadmium(II) tellurides, namely, K{sub 2}Cd{sub 2}Te{sub 3}, K{sub 6}CdTe{sub 4} and K{sub 2}ZnTe{sub 2}, were synthesized by solid-state reactions of the mixture of pure elements of K, Cd (or Zn) and Te in Nb tubes at high temperature. K{sub 2}Cd{sub 2}Te{sub 3} belongs to a new structure type and its structure contains a novel two-dimensional [Cd{sub 2}Te{sub 3}]{sup 2-} layers perpendicular to the b-axis. K(5) cation is located at the center of five member rings of the 2D [Cd{sub 2}Te{sub 3}]{sup 2-} layer, whereas other K{sup +} cations occupy the interlayer space. K{sub 6}CdTe{sub 4} with a K{sub 6}HgS{sub 4} type structure features a 'zero-dimensional' structure composed of isolated CdTe{sub 4} tetrahedra separated by the K{sup +} ions. K{sub 2}ZnTe{sub 2} in the K{sub 2}ZnO{sub 2} structural type displays 1D [ZnTe{sub 2}]{sup 2-} anionic chains of edge sharing [ZnTe{sub 4}] tetrahedra separated by the potassium(I) ions. K{sub 2}Cd{sub 2}Te{sub 3}, K{sub 6}CdTe{sub 4} and K{sub 2}ZnTe{sub 2} revealed a band gap of 1.93, 2.51 and 3.0 eV, respectively. - Graphical abstract: Three new semiconducting K-Zn(Cd)-Te phases were synthesized. They feature 2D, 1D or 0D anionic structure made of corner- and edge-sharing or isolated MTe{sub 4} tetrahedra.
- OSTI ID:
- 21370406
- Journal Information:
- Journal of Solid State Chemistry, Vol. 182, Issue 5; Other Information: DOI: 10.1016/j.jssc.2009.02.020; PII: S0022-4596(09)00084-X; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CADMIUM TELLURIDES
CRYSTAL STRUCTURE
ELECTRONIC STRUCTURE
EV RANGE 01-10
LAYERS
POTASSIUM IONS
POTASSIUM TELLURIDES
SYNTHESIS
ZINC TELLURIDES
ALKALI METAL COMPOUNDS
CADMIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
ENERGY RANGE
EV RANGE
IONS
POTASSIUM COMPOUNDS
TELLURIDES
TELLURIUM COMPOUNDS
ZINC COMPOUNDS