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黑云母是一种天然富铁的造岩矿物。用等加速穆斯堡尔谱仪,在室温下测试了54个黑云母的穆斯堡尔谱,一组下沉深度大的双峰主要是Fe~(2+)的贡献,其中也有Fe~(3+)的重迭。谱形用最小二乘法拟合成洛伦兹线性迭加谱,总的特征是:Fe~(2+)和Fe~(3+)在晶格中各有两个八面体M1和M_2占位,部分样品中Fe~(3+)则占据了四面体T晶位。Fe~(2+)的M_1位的四极分裂Q.S值为2.26～2.49mm/s,M_2位的Q.S值为2.57～2.74mm/s,化学位移I.S值均为1.35～1.45mm/s;Fe~(3+)的M_1位的Q.S值为0.60～0.70mm/s,I.S值为0.55～0.70mm/s,M_2位的
Biotite is a natural iron-rich rock-forming mineral. Mossbauer spectroscopy of 54 biotites was tested at room temperature with an accelerated Mossbauer spectrometer. A set of doublets with a large depth of subsidence was mainly contributed by Fe 2+, among which Fe ~ (3+) overlap. The spectral shape is fitted to the Lorentz linear superposition spectrum by the least squares method. The general characteristics are: Fe 2+ and Fe 3+ occupy two octahedral M1 and M_2 spaces in the crystal lattice respectively In some samples, Fe ~ (3+) occupies tetrahedral T sites. The QS value of Fe ~ (2+) in the M_1 position was 2.26 ~ 2.49mm / s, the QS value in the M_2 position was 2.57 ~ 2.74mm / s, and the chemical shift IS values were 1.35 ~ 1.45mm / s. The QS value of ~ (3+) at M_1 was 0.60 ~ 0.70mm / s, the IS value was 0.55 ~ 0.70mm / s,