Abstract

Zn 5Sb 4ln 2-δ (δ = 0.15(3)) was synthesized in the form of millimeter-sized crystals from reaction mixtures containing excess zinc. The ternary intermetallie compound is temperature polymorphic, and at room temperature it crystallizes with a new structure type in the orthorhombic space group Pbcn, where a = 7.1619(2), b= 17.1562(4), c=8.6887(4) Å, V = 1067.6(1) Å 3, and Z = 4. The structure features 3 2434 nets of Sb atoms that are stacked in antiposition to yield layers of square antiprisms sharing edges plus intervening tetracapped tetrahedra (tetreadersterns). The majority of Zn atoms occupy peripheral tetrahedra of such tetraedersterns, and attain at the same time the peculiar five-coordination by one like atom and four Sb atoms typical for the structures of binary zinc antimonides. The In and remaining Zn atoms are distributed in the tetragonal channels formed by the square antiprisms and display some disorder. At temperatures below 200 K Zn 5Sb 4ln 2-δ undergoes a phase transition into a more ordered structure with monoclinic symmetry (P2 1/c) without any change of the unit cell. The thermoelectric properties of Zn 5Sb 4In 2-δ were measured between 10 and 350 K. Exceptionally low thermal conductivity values (1 W/mK range) were obtained in the whole temperature range. Resistivity and thermopower values are characteristic of a heavily doped or degenerate semiconductor (2.5 mΩ cm and 160 μV/K, respectively, at room temperature) and show a discontinuity around 220 K. The thermoelectric figure of merit of Zn 5Sb 4In 2-δ is higher than that of Zn 4Sb 3 in the investigated temperature range.

Original languageEnglish (US)
Pages (from-to)5996-6003
Number of pages8
JournalInorganic Chemistry
Volume48
Issue number13
DOIs
StatePublished - Jul 6 2009

Fingerprint

zinc antimonides
Zinc
Derivatives
Atoms
atoms
tetrahedrons
Temperature
temperature
room temperature
figure of merit
Thermoelectric power
discontinuity
thermal conductivity
zinc
disorders
Thermal conductivity
Phase transitions
electrical resistivity
Semiconductor materials
symmetry

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Zn 5Sb 4In 2-δ - A ternary derivative of thermoelectric zinc antimonides. / Wu, Yang; Lidin, Sven; Groy, Thomas L.; Newman, Nathan; Häussermann, Ulrich.

In: Inorganic Chemistry, Vol. 48, No. 13, 06.07.2009, p. 5996-6003.

Research output: Contribution to journalArticle

Wu, Yang ; Lidin, Sven ; Groy, Thomas L. ; Newman, Nathan ; Häussermann, Ulrich. / Zn 5Sb 4In 2-δ - A ternary derivative of thermoelectric zinc antimonides. In: Inorganic Chemistry. 2009 ; Vol. 48, No. 13. pp. 5996-6003.
@article{6874104f01da4f0ea131ce6bd77db8ac,
title = "Zn 5Sb 4In 2-δ - A ternary derivative of thermoelectric zinc antimonides",
abstract = "Zn 5Sb 4ln 2-δ (δ = 0.15(3)) was synthesized in the form of millimeter-sized crystals from reaction mixtures containing excess zinc. The ternary intermetallie compound is temperature polymorphic, and at room temperature it crystallizes with a new structure type in the orthorhombic space group Pbcn, where a = 7.1619(2), b= 17.1562(4), c=8.6887(4) {\AA}, V = 1067.6(1) {\AA} 3, and Z = 4. The structure features 3 2434 nets of Sb atoms that are stacked in antiposition to yield layers of square antiprisms sharing edges plus intervening tetracapped tetrahedra (tetreadersterns). The majority of Zn atoms occupy peripheral tetrahedra of such tetraedersterns, and attain at the same time the peculiar five-coordination by one like atom and four Sb atoms typical for the structures of binary zinc antimonides. The In and remaining Zn atoms are distributed in the tetragonal channels formed by the square antiprisms and display some disorder. At temperatures below 200 K Zn 5Sb 4ln 2-δ undergoes a phase transition into a more ordered structure with monoclinic symmetry (P2 1/c) without any change of the unit cell. The thermoelectric properties of Zn 5Sb 4In 2-δ were measured between 10 and 350 K. Exceptionally low thermal conductivity values (1 W/mK range) were obtained in the whole temperature range. Resistivity and thermopower values are characteristic of a heavily doped or degenerate semiconductor (2.5 mΩ cm and 160 μV/K, respectively, at room temperature) and show a discontinuity around 220 K. The thermoelectric figure of merit of Zn 5Sb 4In 2-δ is higher than that of Zn 4Sb 3 in the investigated temperature range.",
author = "Yang Wu and Sven Lidin and Groy, {Thomas L.} and Nathan Newman and Ulrich H{\"a}ussermann",
year = "2009",
month = "7",
day = "6",
doi = "10.1021/ic900302a",
language = "English (US)",
volume = "48",
pages = "5996--6003",
journal = "Inorganic Chemistry",
issn = "0020-1669",
publisher = "American Chemical Society",
number = "13",

}

TY - JOUR

T1 - Zn 5Sb 4In 2-δ - A ternary derivative of thermoelectric zinc antimonides

AU - Wu, Yang

AU - Lidin, Sven

AU - Groy, Thomas L.

AU - Newman, Nathan

AU - Häussermann, Ulrich

PY - 2009/7/6

Y1 - 2009/7/6

N2 - Zn 5Sb 4ln 2-δ (δ = 0.15(3)) was synthesized in the form of millimeter-sized crystals from reaction mixtures containing excess zinc. The ternary intermetallie compound is temperature polymorphic, and at room temperature it crystallizes with a new structure type in the orthorhombic space group Pbcn, where a = 7.1619(2), b= 17.1562(4), c=8.6887(4) Å, V = 1067.6(1) Å 3, and Z = 4. The structure features 3 2434 nets of Sb atoms that are stacked in antiposition to yield layers of square antiprisms sharing edges plus intervening tetracapped tetrahedra (tetreadersterns). The majority of Zn atoms occupy peripheral tetrahedra of such tetraedersterns, and attain at the same time the peculiar five-coordination by one like atom and four Sb atoms typical for the structures of binary zinc antimonides. The In and remaining Zn atoms are distributed in the tetragonal channels formed by the square antiprisms and display some disorder. At temperatures below 200 K Zn 5Sb 4ln 2-δ undergoes a phase transition into a more ordered structure with monoclinic symmetry (P2 1/c) without any change of the unit cell. The thermoelectric properties of Zn 5Sb 4In 2-δ were measured between 10 and 350 K. Exceptionally low thermal conductivity values (1 W/mK range) were obtained in the whole temperature range. Resistivity and thermopower values are characteristic of a heavily doped or degenerate semiconductor (2.5 mΩ cm and 160 μV/K, respectively, at room temperature) and show a discontinuity around 220 K. The thermoelectric figure of merit of Zn 5Sb 4In 2-δ is higher than that of Zn 4Sb 3 in the investigated temperature range.

AB - Zn 5Sb 4ln 2-δ (δ = 0.15(3)) was synthesized in the form of millimeter-sized crystals from reaction mixtures containing excess zinc. The ternary intermetallie compound is temperature polymorphic, and at room temperature it crystallizes with a new structure type in the orthorhombic space group Pbcn, where a = 7.1619(2), b= 17.1562(4), c=8.6887(4) Å, V = 1067.6(1) Å 3, and Z = 4. The structure features 3 2434 nets of Sb atoms that are stacked in antiposition to yield layers of square antiprisms sharing edges plus intervening tetracapped tetrahedra (tetreadersterns). The majority of Zn atoms occupy peripheral tetrahedra of such tetraedersterns, and attain at the same time the peculiar five-coordination by one like atom and four Sb atoms typical for the structures of binary zinc antimonides. The In and remaining Zn atoms are distributed in the tetragonal channels formed by the square antiprisms and display some disorder. At temperatures below 200 K Zn 5Sb 4ln 2-δ undergoes a phase transition into a more ordered structure with monoclinic symmetry (P2 1/c) without any change of the unit cell. The thermoelectric properties of Zn 5Sb 4In 2-δ were measured between 10 and 350 K. Exceptionally low thermal conductivity values (1 W/mK range) were obtained in the whole temperature range. Resistivity and thermopower values are characteristic of a heavily doped or degenerate semiconductor (2.5 mΩ cm and 160 μV/K, respectively, at room temperature) and show a discontinuity around 220 K. The thermoelectric figure of merit of Zn 5Sb 4In 2-δ is higher than that of Zn 4Sb 3 in the investigated temperature range.

UR - http://www.scopus.com/inward/record.url?scp=67649834308&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67649834308&partnerID=8YFLogxK

U2 - 10.1021/ic900302a

DO - 10.1021/ic900302a

M3 - Article

VL - 48

SP - 5996

EP - 6003

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 13

ER -