Abstract
X-ray diffraction, neutron scattering and thermal analysis were used to determine the room temperature crystal structure of LaAlO3 and its phase transition. Two different models were calculated and compared. Tht space group of room temperature LaAlO3 is determined as R3C (a= 5.3648 ± 2?, c = 13.1113±3?). The influence of orientation of AlO6 octahedron or room temperature LaAlO3 crystal on the phase transition was studied.
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