High-pressure synthesis of novel hydrides in Mg-TM systems (TM = Zr, Nb and Mo)

Yasuyuki Goto, Takayuki Hayashi, Riki Kataoka, Hirofumi Kakuta, Atsunori Kamegawa, Hitoshi Takamura, Masuo Okada

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

New hydrides of Mg-TM-H systems, where TM = Zr, Nb and Mo, have been prepared by using cubic-anvil-type apparatus, and their crystal structure and hydrogen content have been investigated. The high-pressure synthesis was performed at 1073-1173 K under 2-5 GPa. In the Mg-Zr-H system, a new hydride Mg 2Zr 3H y with a monoclinic structure (a = 0.8591(1) nm, b = 0.33539(5) nm, c = 0.5816(1) nm, β = 103.06(3)°) was obtained by exposing a mixture of MgH 2 and ZrH 2 to pressure of 2 to 5 GPa at 1073 K for 2 h. In the Mg-Mo system, a new hydride Mg 3MoH 6 was synthesized by exposing a mixture of MgH 2 and Mo to 5 GPa at 1173 K for 2 h. The hydride was found to have a hexagonal structure (a = 0.49958(6) nm, c = 0.8840(2) nm). In the Mg-Nb-H system, a new hydride Mg 4NbH y was also synthesized by exposing a mixture of MgH 2 and Nb to 5 GPa at 1073 K for 2 h.

Original languageEnglish
Pages (from-to)1798-1801
Number of pages4
JournalMaterials Transactions
Volume46
Issue number8
DOIs
Publication statusPublished - 2005 Aug

Keywords

  • High pressure synthesis
  • Magnesium-Molybdenum-Hydrogen system
  • Magnesium-Niobium-Hydrogen system
  • New hydride
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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