Open AccessThe crystal structure of thorium and zirconium dihydrides by X‐ray and neutron diffraction
Author(s) -
Rundle R. E.,
Shull C. G.,
Wollan E. O.
Publication year - 1952
Publication title -
acta crystallographica
Language(s) - English
Resource type - Journals
ISSN - 0365-110X
DOI - 10.1107/s0365110x52000071
Subject(s) - thorium , neutron diffraction , tetragonal crystal system , hydride , zirconium , deuterium , hydrogen , crystallography , x ray crystallography , zirconium hydride , materials science , chemistry , scattering , crystal structure , diffraction , inorganic chemistry , atomic physics , physics , optics , metallurgy , uranium , organic chemistry
Thorium forms a tetragonal lower hydride of composition ThH{sub 2}. The hydrides ThH{sub 2}, ThD{sub 2} and ZrD{sub 2} have been studied by neutron diffraction in order that hydrogen positions could be determined. The hydrides are isomorphous, and have a deformed fluorite structure. Metal-hydrogen distances in thorium hydride are unusually large, as in UH{sub 3}. Thorium and zirconium scattering amplitudes and a revised scattering amplitude for deuterium are reported.