High-pressure synthesis of novel hydrides in Mg-RE systems and their hydrogen content (RE = Y, La)

H. Takamura, Y. Goto, A. Kamegawa, M. Okada

研究成果: Conference article査読

15 被引用数 (Scopus)

抄録

New high-pressure hydrides in the MgH2-REH3 systems, where RE = Y and La, have been prepared by using a cubic-anvil-type apparatus, and their detailed crystal structure and hydrogen content have been investigated. The high-pressure synthesis was performed at 800 °C under 5 GPa for 2 h. In the Mg-Y system, MgY2H7.8 (H/M ≈ 2.6) with an FCC structure (a = 0.51657(2) nm) have been prepared. Based on the hydrogen content and crystallographic consideration, it was suggested that octahedral sites were partially (≈ 60%) occupied by H atoms in addition to tetrahedral sites. For this hydride, H atoms on the tetrahedral sites seem to play a role to hold the FCC unit cell. For MgH2 - x mol% LaH3, the new high-pressure hydride was obtained in the range of 25 ≤ x ≤ 33. Mg3LaH9 was found to have a primitive tetragonal unit cell (a = 0.8172 nm, c = 0.5015 nm).

本文言語English
ページ(範囲)983-988
ページ数6
ジャーナルMaterials Science Forum
419-422
II
DOI
出版ステータスPublished - 2003
イベントProceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003 - Osaka, Japan
継続期間: 2003 1月 262003 1月 30

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

フィンガープリント

「High-pressure synthesis of novel hydrides in Mg-RE systems and their hydrogen content (RE = Y, La)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル