Structure and thermoelectric properties of the new quaternary bismuth selenides A1-xM4-xBi11+xSe21 (A = K and Rb and Cs; M = Sn and Pb) members of the grand homologous series km(M6Se8)m(M5+nSe 9+n)

Antje Mrotzek, Duck Young Chung, Nishant Ghelani, Tim Hogan, Mercouri G Kanatzidis

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23 Citations (Scopus)

Abstract

Several members of the new family A1-xM4-xBi11+xSe21 (A = K, Rb, Cs; M = Sn, Pb) were prepared by direct combination of A2Se, Bi2Se3, Sn (or Pb), and Se at 800°C. The single-crystal structures of K0.54Sn3.54Bi11.46Se21,K 1.46 Pb3.08Bi11.46Se21, Rb0.69Pb3.69Bi11.31Se21,, and Cs0.65Pb3.65Bi11.35Se21 were determined. The compounds A1-xM4-xBi11+x Se21 crystallize in a new structure type with the monoclinic space group C2/m, in which building units of the Bi2Te3 and NaCl structure type join to give rise to a novel kind of three-dimensional anionic framework with alkali-ion-filled tunnels. The building units are assembled from distorted, edge-sharing (Bi,Sn)Se6 octahedra. Bi and Sn/Pb atoms are disordered over the metal sites of the chalcogenide network, while the alkali site is not fully occupied. A grand homologous series Km(M6Se8)m(M5+nSe 9+n) has been identified of which the compounds A1-x M4-xBi11+xSe21 are members. We discuss here the crystal structure, charge-transport properties, and very low thermal conductivity of A1-xM4-xBi11+xSe21.

Original languageEnglish
Pages (from-to)1915-1926
Number of pages12
JournalChemistry - A European Journal
Volume7
Issue number9
DOIs
Publication statusPublished - May 4 2001

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Bismuth
Alkalies
Crystal structure
Transport properties
Charge transfer
Thermal conductivity
Tunnels
Metals
Single crystals
Ions
Atoms

Keywords

  • Bismuth
  • Selenium
  • Semiconductors
  • Structure elucidation
  • Thermoelectric materials

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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title = "Structure and thermoelectric properties of the new quaternary bismuth selenides A1-xM4-xBi11+xSe21 (A = K and Rb and Cs; M = Sn and Pb) members of the grand homologous series km(M6Se8)m(M5+nSe 9+n)",
abstract = "Several members of the new family A1-xM4-xBi11+xSe21 (A = K, Rb, Cs; M = Sn, Pb) were prepared by direct combination of A2Se, Bi2Se3, Sn (or Pb), and Se at 800°C. The single-crystal structures of K0.54Sn3.54Bi11.46Se21,K 1.46 Pb3.08Bi11.46Se21, Rb0.69Pb3.69Bi11.31Se21,, and Cs0.65Pb3.65Bi11.35Se21 were determined. The compounds A1-xM4-xBi11+x Se21 crystallize in a new structure type with the monoclinic space group C2/m, in which building units of the Bi2Te3 and NaCl structure type join to give rise to a novel kind of three-dimensional anionic framework with alkali-ion-filled tunnels. The building units are assembled from distorted, edge-sharing (Bi,Sn)Se6 octahedra. Bi and Sn/Pb atoms are disordered over the metal sites of the chalcogenide network, while the alkali site is not fully occupied. A grand homologous series Km(M6Se8)m(M5+nSe 9+n) has been identified of which the compounds A1-x M4-xBi11+xSe21 are members. We discuss here the crystal structure, charge-transport properties, and very low thermal conductivity of A1-xM4-xBi11+xSe21.",
keywords = "Bismuth, Selenium, Semiconductors, Structure elucidation, Thermoelectric materials",
author = "Antje Mrotzek and Chung, {Duck Young} and Nishant Ghelani and Tim Hogan and Kanatzidis, {Mercouri G}",
year = "2001",
month = "5",
day = "4",
doi = "10.1002/1521-3765(20010504)7:9<1915::AID-CHEM1915>3.0.CO;2-2",
language = "English",
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pages = "1915--1926",
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TY - JOUR

T1 - Structure and thermoelectric properties of the new quaternary bismuth selenides A1-xM4-xBi11+xSe21 (A = K and Rb and Cs; M = Sn and Pb) members of the grand homologous series km(M6Se8)m(M5+nSe 9+n)

AU - Mrotzek, Antje

AU - Chung, Duck Young

AU - Ghelani, Nishant

AU - Hogan, Tim

AU - Kanatzidis, Mercouri G

PY - 2001/5/4

Y1 - 2001/5/4

N2 - Several members of the new family A1-xM4-xBi11+xSe21 (A = K, Rb, Cs; M = Sn, Pb) were prepared by direct combination of A2Se, Bi2Se3, Sn (or Pb), and Se at 800°C. The single-crystal structures of K0.54Sn3.54Bi11.46Se21,K 1.46 Pb3.08Bi11.46Se21, Rb0.69Pb3.69Bi11.31Se21,, and Cs0.65Pb3.65Bi11.35Se21 were determined. The compounds A1-xM4-xBi11+x Se21 crystallize in a new structure type with the monoclinic space group C2/m, in which building units of the Bi2Te3 and NaCl structure type join to give rise to a novel kind of three-dimensional anionic framework with alkali-ion-filled tunnels. The building units are assembled from distorted, edge-sharing (Bi,Sn)Se6 octahedra. Bi and Sn/Pb atoms are disordered over the metal sites of the chalcogenide network, while the alkali site is not fully occupied. A grand homologous series Km(M6Se8)m(M5+nSe 9+n) has been identified of which the compounds A1-x M4-xBi11+xSe21 are members. We discuss here the crystal structure, charge-transport properties, and very low thermal conductivity of A1-xM4-xBi11+xSe21.

AB - Several members of the new family A1-xM4-xBi11+xSe21 (A = K, Rb, Cs; M = Sn, Pb) were prepared by direct combination of A2Se, Bi2Se3, Sn (or Pb), and Se at 800°C. The single-crystal structures of K0.54Sn3.54Bi11.46Se21,K 1.46 Pb3.08Bi11.46Se21, Rb0.69Pb3.69Bi11.31Se21,, and Cs0.65Pb3.65Bi11.35Se21 were determined. The compounds A1-xM4-xBi11+x Se21 crystallize in a new structure type with the monoclinic space group C2/m, in which building units of the Bi2Te3 and NaCl structure type join to give rise to a novel kind of three-dimensional anionic framework with alkali-ion-filled tunnels. The building units are assembled from distorted, edge-sharing (Bi,Sn)Se6 octahedra. Bi and Sn/Pb atoms are disordered over the metal sites of the chalcogenide network, while the alkali site is not fully occupied. A grand homologous series Km(M6Se8)m(M5+nSe 9+n) has been identified of which the compounds A1-x M4-xBi11+xSe21 are members. We discuss here the crystal structure, charge-transport properties, and very low thermal conductivity of A1-xM4-xBi11+xSe21.

KW - Bismuth

KW - Selenium

KW - Semiconductors

KW - Structure elucidation

KW - Thermoelectric materials

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U2 - 10.1002/1521-3765(20010504)7:9<1915::AID-CHEM1915>3.0.CO;2-2

DO - 10.1002/1521-3765(20010504)7:9<1915::AID-CHEM1915>3.0.CO;2-2

M3 - Article

VL - 7

SP - 1915

EP - 1926

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

SN - 0947-6539

IS - 9

ER -