Citation: Zhi Jian WU, Si Yuan ZHANG. The Influence of Bond Valence on Bond Covalency in RMn₂O₅ (R=La, Pr, Nd, Sin, Eu)[J]. Chinese Chemical Letters, ;1999, 10(1): 91-94. shu

The Influence of Bond Valence on Bond Covalency in RMn₂O₅ (R=La, Pr, Nd, Sin, Eu)

Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received Date: 2 August 1998

Fund Project: Authors thank the financial support of Laboratory of Rare Earth Chemistry and Physics. Changchun Institute of Applied Chemistry.

The relationship between bond valence and bond covalency in RMn₂0₅ (R=La, Pr, Nd, Sm, Eu) has been investigated by a semiempirical method. This method is the generalization of the dielectric description theory of Phillips, Van Vechten, Levine and Tanaka scheme. The results indicate that larger valences usually result in higher bond covalencies, in good agreement with the point that the excess charge in the bonding region is the origin of formation of bond covalency. Other factors, such as oxidation state of elements, only make a small contribution to bond covalency.
- Bond valence,
- bond covalency,
- semiempirical method,
- RMn₂O₅
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