The effect of silica on ferric/ferrous ratio in silicate melts: An experimental study using Mössbauer spectroscopy
The effect of silica on ferric/ferrous ratio in silicate melts: An experimental study using Mössbauer spectroscopy
复制标题
二氧化硅对硅酸盐熔体中铁/亚铁比例的影响：使用穆斯堡尔光谱的实验研究
DOI：
10.2138/am.2010.3217
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发表时间：
2010
影响因子：
3.1
通讯作者：
C. McCammon
中科院分区：
文献类型：
--
作者：
A. Borisov;C. McCammon
摘要我们进行了穆斯堡尔谱研究的合成玻璃钙长石透辉石共晶组合物修改与5或1重量%的Fe 2 O3和可变量的二氧化硅。玻璃在空气中在1400-1570 °C的温度范围内合成。室温穆斯堡尔谱表明存在磁性有序的Fe 3+，为此开发了一种系统的拟合程序，以正确估计Fe 3 +/Fe 2+。在恒定的T-fO温度下，我们观察到Fe 3 +/Fe 2+比随二氧化硅的变化最小，其根据温度从56至63重量% SiO2变化。它还表明，铁/亚铁比[log（Fe 3 +/Fe 2+）与1/T]的温度依赖性基本上是相似的碱性和碱性熔体。
Abstract We conducted a Mössbauer study of synthetic glasses with anorthite-diopside eutectic composition modified with either 5 or 1 wt% Fe2O3 and variable amounts of silica. Glasses were synthesized in air in the temperature range 1400-1570 °C. Room-temperature Mössbauer spectra showed the presence of magnetically ordered Fe3+, for which a systematic fitting procedure was developed to correctly estimate Fe3+/Fe2+. At constant T-fO₂ we observed a minimum in the variation of Fe3+/Fe2+ ratio with silica that varied from 56 to 63 wt% SiO2, depending on temperature. It was also demonstrated that the temperature dependence of the ferric/ferrous ratio [log(Fe3+/Fe2+) vs. 1/T] is essentially similar for basic and silicic melts.