用熔盐法合成了新型硅酸铀K6(UO2)3Si8O22,并用单晶X射线衍射确定结构.结果表明,化合物由UO6双四角椎及硅酸根四面体构成的(Si8O22)12-单元组成,其中(Si8O22)12-单元的结构形态是最新发现的.29 Si MAS NMR测定结果与晶体结构相吻合,而光致发光光谱证实了六价铀的存在.K6(UO2)3 Si8 O22空间群为C2/m(No.12),a=1.24092(9)nm,b=1.45678(8)nm,c=0.81199(5)nm,β=103.992(4)°,V=1.4240(1)nm3,Z=2,R1=0.0329,wR2=0.0796.
In this paper,the synthesis and measurement of X-ray crystal structures ofCd￡¨C ￡μH￡μ N￡(c) ￡2￡¨S￡2CO￡-n￡-C￡′H￡1￡(c)￡2andCd￡¨S￡2CO￡-n￡-C￡′H￡1￡(c)2n were reported￡(r)The reaction ofCd￡¨S ￡2 CO￡-n￡-C ￡′ H ￡1 ￡(c) 2 n with pyridine destroyed the original polymeric structure to and yielded t he bis￡-￡¨lewis bases￡(c)adduct￡(r)The crystals belong to monoclinic system,space group P￡2￡¨￡±￡(c)￡ˉc￡(r)The cell dimensions ofCd￡¨C ￡μ H￡μN￡(c)2(S2CO-n-C4H￡1￡(c)￡2re a￡1/2￡±￡(r)￡±￡°￡1￡′￡¨￡±￡2￡(c)￡?b￡1/2￡°￡(r)￡?￡±￡μ￡2￡¨￡?￡(c)￡?c￡1/2￡±￡(r)7985(1￡1￡(c)nm￡?|?￡1/2￡1￡?￡(r)￡±￡′￡?￡¨￡2￡(c)??￡?V￡1/2￡±￡(r)￡2￡2￡°￡′￡¨￡2￡(c)nm￡3 ￡(r)The structure was refined to R￡± ￡1/2￡°￡(r)￡°￡2￡′￡?and w R ￡2 ￡1/20?r)￡°￡?￡′￡μ￡(r)The complex has a centro-sym metric molecule structure￡(r)The cell dimensions of Cd￡¨S￡2CO￡-n￡-C ￡′ H ￡1 ￡(c) 2 n are a￡1/2￡2￡(r)￡μ￡?￡′￡1￡¨￡′￡(c)￡?b￡1/2￡°￡(r)￡μ￡?￡±￡°￡¨￡*￡(c)￡?c￡1/2￡±￡(r)￡±￡3￡′￡?￡¨￡′￡±￡(c)nm￡?|?￡1/2￡±￡°￡±￡(r)￡*￡°￡±￡¨￡2￡(c)??￡?V￡1/2￡±￡(r)6566(3￡(c)nm￡3 ￡(r)The structure was refined to R￡± ￡1/2￡°￡(r)0711and w R￡2￡1/2￡°￡(r)￡±￡*￡μ￡μ￡(r)
