Site occupancy wave and unprecedented infinite zigzag (Te2- 2)n chains in the flat Te nets of the new ternary rare earth telluride family ALn3Te8

Rhonda Patschke, Joy Heising, Jon Schindler, Carl R. Kannewurf, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The three isostructural compounds CsCe3Te8, RbCe3Te8, and KNd3Te8 were synthesized from the reaction of elemental copper and lanthanides in a molten alkali metal/polytelluride flux. They crystallize in the monoclinic space group P21/a (No. 14) with a = 9.057(2) Å, b = 12.996(3) Å, c = 14.840(3) Å, β= 98.74(2)°, V =1726.4(7) Å3, and Z= 4 for CsCe3Te8; a = 9.051(2) Å, b = 12.996(3) Å, c = 14.376(3) Å, β= 98.87(2)°, V = 1670.8(7) Å3, and Z= 4 for RbCe3Te8; and a = 8.956(1) Å, b = 12.836(2) Å, c = 13.856(3) Å, β= 99.42(1)°, V = 1571.3(3) Å3, and Z = 4 for KNd3Te8. The structure of all three compounds can be described as a defect NdTe3 type, consisting of an anionic Ln3Te8 layer that is charge balanced with A+ cations. The anionic layer contains a square Te lattice net with an unprecedented ordered defect pattern site occupancy wave. Variable-temperature electrical conductivity and thermopower measurements are reported.

Original languageEnglish
Pages (from-to)111-115
Number of pages5
JournalJournal of Solid State Chemistry
Volume135
Issue number1
Publication statusPublished - Jan 1998

Fingerprint

tellurides
Rare earths
rare earth elements
Alkali Metals
Lanthanoid Series Elements
Defects
Thermoelectric power
defects
Alkali metals
Rare earth elements
alkali metals
Cations
Molten materials
Copper
Positive ions
Fluxes
cations
copper
electrical resistivity
Temperature

Keywords

  • Conductivity
  • Flux synthesis
  • Polytelluride
  • Rare earth
  • Thermopower

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Site occupancy wave and unprecedented infinite zigzag (Te2- 2)n chains in the flat Te nets of the new ternary rare earth telluride family ALn3Te8 . / Patschke, Rhonda; Heising, Joy; Schindler, Jon; Kannewurf, Carl R.; Kanatzidis, Mercouri G.

In: Journal of Solid State Chemistry, Vol. 135, No. 1, 01.1998, p. 111-115.

Research output: Contribution to journalArticle

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title = "Site occupancy wave and unprecedented infinite zigzag (Te2- 2)n chains in the flat Te nets of the new ternary rare earth telluride family ALn3Te8",
abstract = "The three isostructural compounds CsCe3Te8, RbCe3Te8, and KNd3Te8 were synthesized from the reaction of elemental copper and lanthanides in a molten alkali metal/polytelluride flux. They crystallize in the monoclinic space group P21/a (No. 14) with a = 9.057(2) {\AA}, b = 12.996(3) {\AA}, c = 14.840(3) {\AA}, β= 98.74(2)°, V =1726.4(7) {\AA}3, and Z= 4 for CsCe3Te8; a = 9.051(2) {\AA}, b = 12.996(3) {\AA}, c = 14.376(3) {\AA}, β= 98.87(2)°, V = 1670.8(7) {\AA}3, and Z= 4 for RbCe3Te8; and a = 8.956(1) {\AA}, b = 12.836(2) {\AA}, c = 13.856(3) {\AA}, β= 99.42(1)°, V = 1571.3(3) {\AA}3, and Z = 4 for KNd3Te8. The structure of all three compounds can be described as a defect NdTe3 type, consisting of an anionic Ln3Te8 layer that is charge balanced with A+ cations. The anionic layer contains a square Te lattice net with an unprecedented ordered defect pattern site occupancy wave. Variable-temperature electrical conductivity and thermopower measurements are reported.",
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AU - Patschke, Rhonda

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N2 - The three isostructural compounds CsCe3Te8, RbCe3Te8, and KNd3Te8 were synthesized from the reaction of elemental copper and lanthanides in a molten alkali metal/polytelluride flux. They crystallize in the monoclinic space group P21/a (No. 14) with a = 9.057(2) Å, b = 12.996(3) Å, c = 14.840(3) Å, β= 98.74(2)°, V =1726.4(7) Å3, and Z= 4 for CsCe3Te8; a = 9.051(2) Å, b = 12.996(3) Å, c = 14.376(3) Å, β= 98.87(2)°, V = 1670.8(7) Å3, and Z= 4 for RbCe3Te8; and a = 8.956(1) Å, b = 12.836(2) Å, c = 13.856(3) Å, β= 99.42(1)°, V = 1571.3(3) Å3, and Z = 4 for KNd3Te8. The structure of all three compounds can be described as a defect NdTe3 type, consisting of an anionic Ln3Te8 layer that is charge balanced with A+ cations. The anionic layer contains a square Te lattice net with an unprecedented ordered defect pattern site occupancy wave. Variable-temperature electrical conductivity and thermopower measurements are reported.

AB - The three isostructural compounds CsCe3Te8, RbCe3Te8, and KNd3Te8 were synthesized from the reaction of elemental copper and lanthanides in a molten alkali metal/polytelluride flux. They crystallize in the monoclinic space group P21/a (No. 14) with a = 9.057(2) Å, b = 12.996(3) Å, c = 14.840(3) Å, β= 98.74(2)°, V =1726.4(7) Å3, and Z= 4 for CsCe3Te8; a = 9.051(2) Å, b = 12.996(3) Å, c = 14.376(3) Å, β= 98.87(2)°, V = 1670.8(7) Å3, and Z= 4 for RbCe3Te8; and a = 8.956(1) Å, b = 12.836(2) Å, c = 13.856(3) Å, β= 99.42(1)°, V = 1571.3(3) Å3, and Z = 4 for KNd3Te8. The structure of all three compounds can be described as a defect NdTe3 type, consisting of an anionic Ln3Te8 layer that is charge balanced with A+ cations. The anionic layer contains a square Te lattice net with an unprecedented ordered defect pattern site occupancy wave. Variable-temperature electrical conductivity and thermopower measurements are reported.

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