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以德拜特性温度为可调参量 ,用德拜理论近似分析了某些链状硅酸盐矿物在不同温度、压力下的 57Fe中心移 (δCS)数据。二级多普勒移 δSOD用德拜理论估计 ,并由 δCS的实验值与 δSOD的估计值之差获得同质异能移 δIS。结果表明 ,对中心移的主要贡献来自同质异能移 ,在室温下 ,二级多普勒移仅为中心移的 16 %。室温下 δSOD的压力系数比 δIS的小一个数量级以上 ,故压力改变时δCS的变化主要是δIS的变化引起的。反之 ,在常压下改变温度 ,δCS的变化主要由δSOD的变化决定 ,δIS随温度的变化比 δSOD要小得多。
Debye characteristics of temperature as an adjustable parameter, Debye theory approximately analyzed some of the chain silicate minerals at different temperatures and pressures 57Fe center shift (δCS) data. The second-order Doppler shift δSOD is estimated by Debye theory and the isomerism δIS is obtained from the difference between the experimental value of δCS and the estimated value of δSOD. The results showed that the main contribution to the central shift came from the same energy shift, and at room temperature, the second-order Doppler shift was only 16% of the center shift. The pressure coefficient of δSOD at room temperature is smaller than δIS by more than an order of magnitude, so the change of δCS when the pressure is changed is mainly caused by the change of δIS. On the contrary, changing the temperature under atmospheric pressure, the change of δCS is mainly determined by the change of δSOD. The change of δIS with temperature is much smaller than that of δSOD.