Ternary intermetallics Hf13.0Ni40.8Ga30.9 and Zr13.0Ni40.6Ga31.0

Wen Heng Huang, Chi-Shen Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Ternary compounds Hf13.0Ni40.8Ga30.9 and Zr13.0Ni40.6Ga31.0 were synthesized from the pure elements in arc-melting reactions; their structures were characterized through X-ray diffraction of single crystals. Each compound adopts a hexagonal structure of type Y13Pd40Sn31 and crystallizes in space group P6/mmm (No. 191). The cell parameters of Hf13.0Ni 40.8Ga30.9 are a = 17.895(3) ; c = 8.2434(16) ; V = 2286.0(6) 3; R1/wR2 = 0.0299/0.0598. The cell parameters of Zr13.0Ni40.6Ga31.0 are a = 17.964(3) ; c = 8.2757(17) ; V = 2312.7(7) 3; R1/wR 2 = 0.0348/0.0686. These structures comprise polyhedra with diverse coordination numbers - Hf 12-15, Ni and Ga 6-12. Analysis of the structures reveals layer frameworks based on structures of type CaCu5, accompanied with atomic substitution and elimination on the layers and decreased values of the concentration of valence electrons. Calculated electronic structures reveal a strong contribution from a Ni-Ga interaction and the characteristics of a polar intermetallic phase.

Original languageEnglish
Pages (from-to)1635-1641
Number of pages7
JournalIntermetallics
Volume19
Issue number11
DOIs
StatePublished - 1 Nov 2011

Keywords

  • A. intermetallics, ternary alloy systems
  • B. crystal chemistry of intermetallics
  • B. crystallography
  • E. electronic structure, calculation

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