covalency

1. The relationship between bond valence and bond covalency has been investigated by a semiempirical method.
   用一种半经验方法研究了固体材料中键电荷与键共价性的关系。
2. And why did he call it polar covalency?
   为什么要称它为极性共价呢？
3. So you can see that polar covalency is a tendency towards ionic bonding.
   所以你看得出极性共价就是，趋向离子键的。
4. The ordering of the magnitude for bond covalency is La-O
   共价性的大小次序为La-O
5. The results obtained indicate the influence of the host lattice, radius of positive ion and the covalency of the Pr 3+-O 2-bond on the spectral character.
   探讨了基质晶格、阳离子半径、Pr3＋－O2－键的共价性等因素对光谱性质的影响；
6. The results of calculation show that the bonds between lanthanum and coordination atoms have certain extent covalency.
   结果表明，镧与配位原子间的键具有一定程度的共价性。
7. In this paper, the relationship that the average covalency reduction factor N and the crystal field parameter D q alter with temperature from the equation of solid has been found. Therefore the temperature dependence spectrum in Zn 1-x Mn xSe may be explained satisfactorily.
   该文从固态物质的物态方程出发，找到了根据共价效应修正因子N和晶场参数Dq随温度变化的关系，从而满意地解释了Zn1-xMnxSe光谱的温度移位。
8. Investigation of Covalency and Spectrum Shifts in 3 d Transition-metal Compounds
   3d过渡晶体化学键共价性和光谱位移研究
9. The IR spectra of styrene-acrylic acid copolymer-supported neodymium complexes were investigated. The complexes possess a structure of bidentate carboxylate groups and the Nd-O bond in the complexes is rich in covalency.
   红外光谱研究表明，苯乙烯-丙烯酸共聚物载体-钕络合物具有双配位的羧酸根结构，Nd-O键富有共价性。
10. The results indicate that the intensity parameters Ω_2 and Ω_4 increase with the increase of GeO_2 contents. It suggests that the symmetry becomes lower, the band of Eu and O atoms becomes stronger and the covalency increases.
    结果显示强度参量Ω2与Ω4随着GeO2量的增加而增加，表明材料的对称性降低，Eu-O键强增加，共价性增加。
11. Influence of Susceptibilities and Covalency on Sn~ ( 4+) and I~-Mossbauer isomer shifts
    共价和极化对~（119）Sn、~（129）I穆斯堡尔谱位移的影响
12. It is found that Li ions have more space to move, and its covalency is very strong.
    分析发现，Li离子在晶胞内有更大活动空间，共价性很强。

noun

1. valence characterized by the sharing of electrons in a chemical compound

   Synonym:    covalence