Room-temperature compressibilities of MnO and CdO: further examination of the role of cation type in bulk modulus systematics
Room-temperature compressibilities of MnO and CdO: further examination of the role of cation type in bulk modulus systematics
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DOI：
10.1007/s002690050229
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发表时间：
1999-09
影响因子：
1.4
通讯作者：
Jianzhong Zhang
中科院分区：
文献类型：
--
作者：
Jianzhong Zhang
室温体积测量高达8.1 GPa显示，岩盐结构的MnO和CdO具有相同的可压缩性在研究的压力范围内。在体积模量与晶胞体积的关系图中，CdO的曲线远高于3d过渡金属一氧化物的趋势，这一行为偏离了常数K 0 V0的经验预测。目前的观察结果支持我们先前的建议，即对于同构固体，经验预测的体积模量-体积关系可能限于它们共享相同价电子特征的子集（即，s vs 3d vs 4d）。对于形成过渡金属一氧化物的阳离子，Pauling电负性随离子半径的变化显示出与所观察到的体积模量趋势定性相似的差异，这表明键共价差异可能有助于3d和4d过渡金属一氧化物之间的不同行为。
Room-temperature volume measurements up to 8.1 GPa reveal that rock-salt structured MnO and CdO have identical compressibility in the pressure range studied. In the plot of bulk modulus vs unit-cell volume, CdO plots well above the trend of the 3d transition metal monoxides, a behavior that deviates from empirical predictions of constantK0V0. The present observations are in favor of our earlier suggestion that, for isostructural solids, the empirically predicted bulk modulus-volume relationship may be limited to their subsets that share the same valence electron character (i.e., s vs 3d vs 4d). For cations forming transition metal monoxides, variations of Pauling electronegativity with ionic radius show differences that are qualitatively similar to the observed trends of bulk modulus, suggesting that bond covalency differences may contribute to the different behaviors between the 3d and 4d transition metal monoxides.