Ordered CoSn-type ternary phases in Co 3Sn 3-xGe x

J. M. Allred, Shuang Jia, M. Bremholm, B. C. Chan, R. J. Cava

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

CoSn is the prototype compound of the B35 structure, which has long been of interest due to its rarity and unusually low packing density. We report the synthesis and properties of the solid solution Co 3Sn 3-xGe x for 0 ≤ x ≤ 2, in order to clarify the conditions necessary to stabilize such a phase. By taking advantage of the chemical differences between the two crystallographically inequivalent Sn sites in the structure, we observe ordered ternary phases, nominally Co 3SnGe 2 and Co 3Sn 2Ge. The electron count and unit cell configuration remain unchanged from CoSn; these observations thus help to clarify some ambiguities about the stabilizing forces in this crystal structure. All compounds are normal metals with room temperature conductivities ranging from 5 to 50 μΩ cm and are weakly paramagnetic.

Original languageEnglish (US)
Pages (from-to)137-143
Number of pages7
JournalJournal of Alloys and Compounds
Volume539
DOIs
StatePublished - Oct 25 2012

All Science Journal Classification (ASJC) codes

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

Keywords

  • Crystal growth
  • Crystal structure
  • Electronic properties
  • Intermetallics
  • Preferential site ordering
  • X-ray diffraction

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