Author： A. Lefebvre P. Bassoul
Publisher： Taylor & Francis Ltd
ISSN： 1362-3036
Source： Philosophical Magazine Letters, Vol.84, Iss.8, 2004-07, pp. : 495-500
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Abstract
One of the high-temperature metastable phases found in the MgGa 2 O 4 -Ga 2 O 3 system is the 
Mg non-stoichiometric Mg gallate. It has a one-dimensional periodic antiphase boundary (PAPB) structure based on the spinel structure. The APBs are parallel to the {3 1 0} planes and the APB vectors are of the 1/4
1 1 0
type when referred to the spinel structure. This generally leads to the existence of 12 monoclinic twin variants in the studied samples. By comparing the X-ray or electronic diffraction patterns of both phases, it will be shown that the recently discovered 
transition-alumina has the same type of structure.
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