Structure and thermoelectric properties of SrBiTe3; 12-fold superstructure caused by distortion of the two-dimensional Te-Nets

Kyoung Shin Choi, Duck Young Chung, Joy Heising, Paul W. Brazis, Carl R. Kannewurf, Mercouri G Kanatzidis

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The ternary compound, SrBiTe3, was prepared by the molten flux method. It crystallizes in the orthorhombic space group Pmmn with a=4.665(2) angstrom, b=4.517(2) angstrom, c=16.129 angstrom, and Z=2. The compound is composed of a NaCl-type [Bi2Te4]2- layer and a flat square (Te2)2- net with equal Te-Te distances of 3.24 angstrom. The Sr2+ ions are stabilized between the layers in monocapped square antiprismatic sites. X-ray and electron diffraction studies reveal a 12-fold superstructure due to subtle distortions within the Te net of the compound. The superstructure was refined in the monoclinic space group C2 with a=27.923(5) angstrom, b=32.228(6) angstrom, c=4.5069(9) angstrom, β=90.000(3)°. The compound is a semiconductor with a band gap value of 0.14 eV. It melts incongruently at 613°C.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages117-122
Number of pages6
Volume545
Publication statusPublished - 1999
EventProceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998' - Boston, MA, USA
Duration: Nov 30 1998Dec 3 1998

Other

OtherProceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998'
CityBoston, MA, USA
Period11/30/9812/3/98

Fingerprint

Electron diffraction
Molten materials
Energy gap
Ions
Semiconductor materials
Fluxes
X ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Choi, K. S., Chung, D. Y., Heising, J., Brazis, P. W., Kannewurf, C. R., & Kanatzidis, M. G. (1999). Structure and thermoelectric properties of SrBiTe3; 12-fold superstructure caused by distortion of the two-dimensional Te-Nets. In Materials Research Society Symposium - Proceedings (Vol. 545, pp. 117-122). Materials Research Society.

Structure and thermoelectric properties of SrBiTe3; 12-fold superstructure caused by distortion of the two-dimensional Te-Nets. / Choi, Kyoung Shin; Chung, Duck Young; Heising, Joy; Brazis, Paul W.; Kannewurf, Carl R.; Kanatzidis, Mercouri G.

Materials Research Society Symposium - Proceedings. Vol. 545 Materials Research Society, 1999. p. 117-122.

Research output: Chapter in Book/Report/Conference proceedingChapter

Choi, KS, Chung, DY, Heising, J, Brazis, PW, Kannewurf, CR & Kanatzidis, MG 1999, Structure and thermoelectric properties of SrBiTe3; 12-fold superstructure caused by distortion of the two-dimensional Te-Nets. in Materials Research Society Symposium - Proceedings. vol. 545, Materials Research Society, pp. 117-122, Proceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998', Boston, MA, USA, 11/30/98.
Choi KS, Chung DY, Heising J, Brazis PW, Kannewurf CR, Kanatzidis MG. Structure and thermoelectric properties of SrBiTe3; 12-fold superstructure caused by distortion of the two-dimensional Te-Nets. In Materials Research Society Symposium - Proceedings. Vol. 545. Materials Research Society. 1999. p. 117-122
Choi, Kyoung Shin ; Chung, Duck Young ; Heising, Joy ; Brazis, Paul W. ; Kannewurf, Carl R. ; Kanatzidis, Mercouri G. / Structure and thermoelectric properties of SrBiTe3; 12-fold superstructure caused by distortion of the two-dimensional Te-Nets. Materials Research Society Symposium - Proceedings. Vol. 545 Materials Research Society, 1999. pp. 117-122
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N2 - The ternary compound, SrBiTe3, was prepared by the molten flux method. It crystallizes in the orthorhombic space group Pmmn with a=4.665(2) angstrom, b=4.517(2) angstrom, c=16.129 angstrom, and Z=2. The compound is composed of a NaCl-type [Bi2Te4]2- layer and a flat square (Te2)2- net with equal Te-Te distances of 3.24 angstrom. The Sr2+ ions are stabilized between the layers in monocapped square antiprismatic sites. X-ray and electron diffraction studies reveal a 12-fold superstructure due to subtle distortions within the Te net of the compound. The superstructure was refined in the monoclinic space group C2 with a=27.923(5) angstrom, b=32.228(6) angstrom, c=4.5069(9) angstrom, β=90.000(3)°. The compound is a semiconductor with a band gap value of 0.14 eV. It melts incongruently at 613°C.

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