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Comparison of Uranium(VI) and Thorium(IV) Silicates Synthesized via Mixed Fluxes Techniques
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2018-05-16 00:00:00 , DOI: 10.1021/acs.inorgchem.8b01072 Haijian Li 1, 2 , Philip Kegler 1 , Vladislav V. Klepov 3 , Martina Klinkenberg 1 , Dirk Bosbach 1 , Evgeny V. Alekseev 1, 2
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2018-05-16 00:00:00 , DOI: 10.1021/acs.inorgchem.8b01072 Haijian Li 1, 2 , Philip Kegler 1 , Vladislav V. Klepov 3 , Martina Klinkenberg 1 , Dirk Bosbach 1 , Evgeny V. Alekseev 1, 2
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Two uranium and two thorium silicates were obtained using high temperature mixed fluxes methods. K14(UO2)3Si10O30 crystallizes in the P21/c space group and contains open-branched sechser (six) single silicate chains, whereas K2(UO2)Si2O6 crystallizes in the C2/c space group and is built of unbranched achter (eight) silicate chains. The crystals of K14(UO2)3Si10O30 and K2(UO2)Si2O6 are related by increasing U/Si molar ratios, and both structures contain the same secondary building units (SBUs), [USi6] heptamers. The triangle diagram for all known A+–UO22+–SiO44– phases demonstrates the high polymerization level of silicate groups in the system, which was compared with the family of A+–UO22+–BO33–/BO45– compounds. For both thorium silicates, the transformation of K2ThSi2O7 to K2ThSi3O9 was found to be a factor of the reaction time. K2ThSi2O7 crystallizes in the C2/c space group and belongs to the Na2SiVISi2O7 structure type. Its 3D framework consists of diorthosilicate Si2O7 group and ThO6 octahedra. Noncentrosymmetric K2ThSi3O9 crystallizes in the hexagonal P63 space group and adopts mineral wadeite-type structure based upon triorthosilicate Si3O9 rings and ThO6 octahedra. The coordination environment of thorium for all existing oxo-anion compounds including B, Si/Ge, P/As, Cr/Mo/W, and S/Se/Te are summarized and analyzed. Additionally, spectroscopic properties of all novel materials have been studied.
中文翻译：
混合助熔剂技术合成铀（VI）和Thor（IV）硅酸盐的比较
使用高温混合助熔剂方法获得了两种铀和两种硅酸th。K 14（UO 2）3 Si 10 O 30在P 2 1 / c空间群中结晶，并包含开链sechser（六个）单硅酸盐链，而K 2（UO 2）Si 2 O 6在C 2中结晶。/ c空间群是由直链的achter（八个）硅酸盐链构建的。K 14（UO 2）3 Si 10 O 30的晶体与K 2（UO 2）Si 2 O 6的关系是通过增加U / Si摩尔比来实现的，两个结构都包含相同的二级结构单元（SBU），即[USi 6 ]七聚体。所有已知的A + –UO 2 2+ –SiO 4 4–相的三角图表明了系统中硅酸酯基团的高聚合水平，并将其与A + –UO 2 2+ –BO 3 3– / BO 4 5 –化合物。对于两种硅酸or ，K 2 ThSi的转变发现2 O 7至K 2 ThSi 3 O 9是反应时间的因素。K 2 ThSi 2 O 7在C 2 / c空间群中结晶，属于Na 2 Si VI Si 2 O 7结构类型。它的3D框架由原硅酸Si 2 O 7基团和ThO 6八面体组成。非中心对称的K 2 ThSi 3 O 9在六角形的P 6 3中结晶空间群，并基于硅酸三硅Si 3 O 9环和ThO 6八面体采用矿物辉石型结构。总结并分析了for对所有现有含氧阴离子化合物（包括B，Si / Ge，P / As，Cr / Mo / W和S / Se / Te）的配位环境。另外，已经研究了所有新型材料的光谱性质。
更新日期：2018-05-16
中文翻译：
混合助熔剂技术合成铀（VI）和Thor（IV）硅酸盐的比较
使用高温混合助熔剂方法获得了两种铀和两种硅酸th。K 14（UO 2）3 Si 10 O 30在P 2 1 / c空间群中结晶，并包含开链sechser（六个）单硅酸盐链，而K 2（UO 2）Si 2 O 6在C 2中结晶。/ c空间群是由直链的achter（八个）硅酸盐链构建的。K 14（UO 2）3 Si 10 O 30的晶体与K 2（UO 2）Si 2 O 6的关系是通过增加U / Si摩尔比来实现的，两个结构都包含相同的二级结构单元（SBU），即[USi 6 ]七聚体。所有已知的A + –UO 2 2+ –SiO 4 4–相的三角图表明了系统中硅酸酯基团的高聚合水平，并将其与A + –UO 2 2+ –BO 3 3– / BO 4 5 –化合物。对于两种硅酸or ，K 2 ThSi的转变发现2 O 7至K 2 ThSi 3 O 9是反应时间的因素。K 2 ThSi 2 O 7在C 2 / c空间群中结晶，属于Na 2 Si VI Si 2 O 7结构类型。它的3D框架由原硅酸Si 2 O 7基团和ThO 6八面体组成。非中心对称的K 2 ThSi 3 O 9在六角形的P 6 3中结晶空间群，并基于硅酸三硅Si 3 O 9环和ThO 6八面体采用矿物辉石型结构。总结并分析了for对所有现有含氧阴离子化合物（包括B，Si / Ge，P / As，Cr / Mo / W和S / Se / Te）的配位环境。另外，已经研究了所有新型材料的光谱性质。
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