溴化锫在低温下是PuBr3结构的,为正交晶系,晶格参数 a = 403 pm、b = 1271 pm 和c = 912 pm。[2]在高温下,溴化锫呈AlCl3结构,为单斜晶系,晶格参数 a = 723 pm、b = 1253 pm、c = 683 pm 和β = 110.6°。[2][3][4][5]
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