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<正> K7H6[Nd(GeMo11O39)2]·27H2O, Mr = 4413.8, crystallizes in monoclinic, space group P21/n with a = 17. 095(4), b = 26. 895(3), c = 21. 214(5) (?); β=103. 11(2)°;V = 9499. 4(3)(?)3; F(000) = 8808; Z = 4; Dc = 3. 05g/cm3; μ(MoKα) = 43. 7cm-