Interstitial Order-Disorder Transformation in the Ti-O Solid Solution. I. Ordered Arrangement of Oxygen

• DOI: 10.1143/jpsj.27.155
• Publication Date: 2005-07-20T11:22:27Z
• Authors: Sadae Yamaguchi
• Keywords: Interstitial defect; Superstructure; Lattice (music); Lattice constant

The crystal structure of the interstitial solid solution alpha titanium-oxygen system has been investigated by a combined method electron, neutron and X-ray diffraction as functions composition annealing temperature. existence two-types superstructure established over nearly whole range below critical One them designated α' layer-ordered anti-Cd(OH) 2 type (space group P \bar3 m 1) involving out-of-steps with regard to oxygen distribution. other is low-temperature form α'' which trigonal symmetry \bar31 c ) cell dimension \(a{=}\sqrt{3}a_{0}\) =2 0 ( are lattice constants original h.c.p. cell). distribution in this phase generally specified terms dependent parameters occupation probabilities for three octahedral sites 2(a), 2(c) 2(d). at special TiO 0.33 coincides model proposed Holmberg.