Revisiting the hydrogenation behavior of NdGa and its hydride phases.

ABSTRACT: NdGa hydride and deuteride phases were prepared from high-quality NdGa samples and their structures characterized by powder and single-crystal X-ray diffraction and neutron powder diffraction. NdGa with the orthorhombic CrB-type structure absorbs hydrogen at hydrogen pressures ≤ 1 bar until reaching the composition NdGaH(D)_1.1, which maintains a CrB-type structure. At elevated hydrogen pressure additional hydrogen is absorbed and the maximum composition recovered under standard temperature and pressure conditions is NdGaH(D)_1.6 with the Cmcm LaGaH_1.66-type structure. This structure is a threefold superstructure with respect to the CrB-type structure. The hydrogen atoms are ordered and distributed on three fully occupied Wyckoff positions correspondin

SUBMITTER: Shtender V 

PROVIDER: S-EPMC11001401 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature