Synthesis and characterization of KTh2SeE6, KTh2Te6 and CsTh2Se6

Eric J. Wu, Michael A. Pell, James A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The compounds KTh2Se6, KTh2Te6 and CsTh2Se6 have been synthesized in the temperature range 873 to 923 K. These compounds are isostructural with the previously synthesized compound CsTh2Te6. They crystallize in the space group D172h-Cmcm of the orthorhombic system with two formula units in cells: a=4.14(2) Å, b=21.88(4) Å, c=5.64(1) Å, V=511(4) Å3 (T=298 K) for KTh2Se6; a=4.356(1) Å, b =23.702(7) Å, c=6.141(2) Å, V=634.1(3) Å3 for KTh2Te6 (T=113 K); and a=4.14(5) Å, b=23.88(4) Å, c=5.67(5) Å, V=561(13) Å3 (T=298 K) for CsTh2Se6. The structure of KTh2Te6 has been determined from single-crystal X-ray data. The structure is composed of 2∞[Th2Te-6] layers that stack perpendicular to [010]. The layers are separated by K+ cations that are coordinated to eight Te atoms at the corners of a rectangular parallelepiped. The K site is one-half occupied. Te atoms form infinite chains within the layers along [001] with Te-Te distances between 3.057(3) Å and 3.085(3) Å. KTh2Se6, KTh2Te6 and CsTh2Se6 are highly resistive along [100].

Original languageEnglish (US)
Pages (from-to)106-109
Number of pages4
JournalJournal of Alloys and Compounds
Volume255
Issue number1-2
DOIs
StatePublished - Jun 22 1997

Keywords

  • Solid-state compounds
  • Synthesis

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Synthesis and characterization of KTh<sub>2</sub>SeE<sub>6</sub>, KTh<sub>2</sub>Te<sub>6</sub> and CsTh<sub>2</sub>Se<sub>6</sub>'. Together they form a unique fingerprint.

Cite this