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Synthesis of Single-Phase YMn2D2 Studied by in situ Neutron Diffraction

✍ Scribed by V. Paul-Boncour; M. Latroche; A. Percheron-Guégan

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
177 KB
Volume
150
Category
Article
ISSN
0022-4596

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✦ Synopsis

Hydrogen absorption at room temperature in YMn 2 leads to a mixture of several phases with various hydrogen contents.

A thermal treatment at 473 K allows single-phase YMn 2 H x hydrides with 0(x43.5 to be obtained. The hydride synthesis has been studied in the case of single-phase YMn 2 D 2 by in situ thermal-dependent neutron di4raction experiments. The di4erent steps for the formation of the single-phase deuteride are described and discussed.

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Structural Phase Transition of Orthorhombic LaCrO3 Studied by Neutron Powder Diffraction
✍ K. Oikawa; T. Kamiyama; T. Hashimoto; Y. Shimojyo; Y. Morii 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 227 KB

An orthorhombic to a rhombohedral structural phase transition of LaCrO 3 has been studied by the neutron powder di4raction over the temperature range of 295+1013 K. At the phase transition around 2603C, the negative volume expansion was observed, and the amount of the volume compression was estimate