PREPARATION AND CRYSTAL STRUCTURES OF Ln2（S04）3（H2O）4 （Ln=La COMPOUND Ⅰ;Nd,COMPOUND Ⅱ）

摘要

＜正＞ The title crystal structures have been determined by X-ray diffraction. They crystallize in the monoclinic, space group P21/n, Z=4 with diaensions a= 12.388（1）, b= 7.140（1）, c= 14.302（1） A,β=90.65（1）° for compound Ⅰ, and a=12.987（2）, b= 7.190（1）, c=13.284（2） A,β=92.40（2）° for compound Ⅱ. The structures were solved by direct methods, and refined by full matrix least-squares to consistence factors R=0.026 for Ⅰ and R=0.031 for Ⅱ.