摘要:
Pb(OH)Br,Pb(OH)Cl,Pb(OD)Br和Pb(OD)I的晶体结构分别通过单晶X射线和中子衍射法以及中子粉末Rietveld方法精制而成。月桂石型结构(Pnma,Z = 4; wR 2 = 4.85%,a = 711.2(1),b = 401.92(5),c = 971.4(1)pm(Pb(OH)Cl); R w = 9%,a = 738.5(1),b = 408.53(6),c = 1001.2(1)pm(Pb(OH)Br); R I = 3.6%,a = 738.38(2),b = 408.433 (9)和c = 1001.38(3)pm(Pb(OD)Br); RI = 6.2%,a = 780.61(2),b = 420.40(1),c = 1045.88(3)pm(Pb(OD)I)。与相应的钡和锶化合物相比,形成的氢键明显更强。这是由于(i)铅(II)离子比钡和锶