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在13.6℃用中子四圆衍射仪收集了BaTiO3单晶的衍射数据55个。利用最小二乘法对四方相BaTiO3(p4mm)的结构作了进一步的研究,R因子达到1.86%。结果表明,b位附近的O原子是无序的。The crystal structure of tetragonal barium titanate (space group P 4 mm) was determined at 13.6℃, using the data collected by neutron four-circle diffractoraeter, R(F) = 0.0186. The O atoms near b sites distribute disorberly.
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