摘要
测量了五磷酸铕晶体的穆斯堡尔谱,并得到了相应的穆斯堡尔参数:同质异能移位(IS)、四极矩分裂(eQV_(zz))、电场梯度分量(V_(zz))以及电场梯度在^(151)Eu 核处的不对称因子(η)。从有关的穆斯堡尔参数和电场梯度的计算,得到了五磷酸铕晶体中的电荷分布的近似结果。基于晶格加和方法,对五磷酸铕的晶体场参数进行了计算。所有结果表明,在五磷酸铕晶体中铕原子和最近邻氧原子间的化学键可能不是纯离子性的。
Some M(?)ssbaner parameters,such as the isomer shift(IS),the electric quadrupole splitting(eQVzz),the component(Vzz)of electric fieldgradient,and the asymmetry parameter(η)of electric field gradient at theMossbauer nucleus(^(151)Eu),are determined from the M(?)ssbauer spectrum ofthe europium pentaphosphate crystal,The approximate electric charge distri. bution in the crystal has been obtained from the M(?)ssbauer parameters andthe calculated results of the electric field gradient.On the basis of the latticesum,the calculation for the europium pentaphosphate crystal field parameterswas performed,All the results show that the chemical bond between,the euro-pium atom and the nearest oxygen atom may possess a certain covalent cha-racter
出处
《人工晶体学报》
EI
CAS
CSCD
1989年第4期323-328,共6页
Journal of Synthetic Crystals
关键词
穆斯堡尔谱
五磷酸铕晶体
晶体场参数
Mossbauer spectrum
europium pentaphosphate crystal
crystal field parameters
