...
首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Revised values of the bond-valence parameters for Te~(IV)-O, Te~(VI)-O and Te~(IV)-Cl
【24h】

Revised values of the bond-valence parameters for Te~(IV)-O, Te~(VI)-O and Te~(IV)-Cl

机译:Te〜(IV)-O,Te〜(VI)-O和Te〜(IV)-Cl键价参数的修正值

获取原文
获取原文并翻译 | 示例
           

摘要

Bond-valence parameters r 0 and b have been re-determined for Te ~(IV)-O: r 0 = 1.9605?, b = 0.41; Te~(VI)-O: r 0 = 1.921?, b = 0.56; and Te~(IV)-Cl: r 0 = 2.3115?, b = 0.555. Bond distance data from 208 independent Te~(IV)-O polyhedra, 118 Te ~(VI)-O polyhedra and 26 Te~(IV)-Cl polyhedra were used, and all neighbours out to 3.5? were included. Root-mean square deviations of bond-valence sums on Te from ideal values were 0.1934, 0.1939 and 0.0865v.u. The good fit for Te~(IV)-O over a range of Te coordination numbers from 3 to 12 demonstrates that there is no essential difference in character between short 'primary' Te-O bonds, oriented away from the Te lone pair, and longer 'secondary' Te-O bonds on the same side of the Te atom as the lone pair. Comparison of bond-valence sums for Te-O polyhedra obtained using the new parameters with those calculated using earlier literature values shows that the new parameters give a narrower spread of calculated bond-valence sums, which means much closer to the formal valence for both oxidation states of tellurium.
机译:对于Te〜(IV)-O,已经重新确定了键价参数r 0和b:r 0 =1.9605Ω,b = 0.41; Te〜(VI)-O:r 0 = 1.921°,b = 0.56; m = 0。和Te〜(IV)-Cl:r 0 =2.3115Ω,b = 0.555。使用了来自208个独立的Te〜(IV)-O多面体,118个Te〜(VI)-O多面体和26个Te〜(IV)-Cl多面体的键距数据,所有邻域都达到3.5?。被包括在内。 Te上键合价和与理想值的均方根偏差为0.1934、0.1939和0.0865v.u。 Te〜(IV)-O在3到12的一系列Te配位数上的良好拟合表明,短的“主要” Te-O键(远离Te孤对)定向的特征之间没有本质区别。在Te原子与孤对同一侧的较长“次级” Te-O键。比较使用新参数获得的Te-O多面体的键合价和与使用较早的文献值计算得到的键合价,发现新参数给出的键合价和的分布范围更窄,这意味着两种氧化的形式价更接近碲的状态。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号