【摘要】 利用电子顺磁共振（EPR）和X射线衍射方法研究了天然和热处理钠长石单晶。热处理在500—850℃水热条件下完成。在外加磁场B平行于晶体c^*轴的方向上,测量了加热前后Fe³⁺的EPR谱和线宽△B随温度和加热时间的变化。结果显示,线宽随Al、Si无序的增大而增加。由此得出结论,在低温钠长石中,Fe³⁺位于Al³⁺占据的T₁（o）位置,在被研究的温度范围内,Fe³⁺未参与四面体位置T间Al、Si交换。谱线的加宽主要是由在Fe³⁺邻近位置上Al、Si无序的增大引起的,同时与观测到的晶胞参数变化有关。在Al、Si无序更强的晶体中,Fe³⁺谱变得极宽。更多还原

【Abstract】 Natural and heat-treated single crystals of albite were studied by electronparamagnetic resonance （EPR） and X-ray diffraction. Heat treatments werecarried out between 500℃ and 850℃ under hydrothermal conditions. The EPRspectra of Fe³⁺ and the changes of linewidth, △B, with increasing temperatureand heating time were measured for the applied magnetic field, B, parallel toc⁺⁺ before and after heat treatment. Significant line broadening was observedwhich increased with increasing Al, Si disorder. It is concluded that Fe³⁺ islocated at the tetrahedral T₁（o） position of Al³⁺ in low albite and does not participate in the Al, Si exchange among the T sites within the range of tem-peratures studied. The line broadening is primarily due to increasing Al, Sidisorder at adjacent Fe³⁺ sites in the albite, and can be correlated with obser-ved cbanges in the lattice constants of the crystals. In more Al, Si disorderedcrystals the Fe³⁺ lines become exceedingly broad.更多还原