镧系收缩

两类配合物中Ln-O平均键长的变化规律很好地体现了镧系收缩效应。

The variation of average Ln-O bond length in two groups well reflected the lanthanide contraction effect .

这些固溶体的晶胞参数随着原子序数的增加而减少，这种变化规律是由镧系收缩引起的。

This change is caused by the lanthanide contraction .

mol-1，结果符合镧系收缩规律。

Mol-1 respectively . It comes out to follow the Ln contract law .

（PO4）~（3-）四面体的振动频率对晶体结构很敏感，镧系收缩引起的频移与振动性质以及镧氧配位体、磷氧四面体的结构方式有关。

The lanthanide contraction shifts the stretching and libration of ( PO_4 ) ~ ( 3 - ) and Ln O bond vibrations to higher frequencies . The amounts fo shifting are concerned with the structure of Ln O coordinations and PO_4 tetrahedra .

镧系收缩及其所产生的影响

Lanthanide Contraction and its Effects

未来元素的预测等。并对元素第二周期性原因、镧系收缩后果等问题作出新的解释。

And the article works out a new explanation of the second periodic cause of elements and of the result of lanthanide contraction .

镧系收缩对能否形成微孔配位聚合物的影响并不明显，只是轻稀土离子往往倾向于多结合一些小分子配体来满足更高的配位数。

But in order to complete the high coordination numbers , light rare earth ions are liable to coordinate to more small ligands .

这些数据表明振动频率取决于晶体结构并揭示了镧系收缩效应对振动频率的规律性影响。

It is evident from these data that the crystal structure determines the frequency position , and clearly shows the effect of the lanthanide contraction in this series of compounds .

此外，该标度值的相对大小还能反映配合物的稳定性，过渡金属收缩和镧系元素收缩等性质。

The ligand field stabilization , the transition-metal contraction , and the lanthanide contraction are reflected in the relative values of the electronegativity scale .