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金红石(TiO_2)是一种常见的矿物,它以多种地质产状出现。通常认为这种矿物不象人工缺氧金红石(TinO(?)),它不存在非化学配比状况,因此也没有晶体切变结构。本文对三个不同产状的天然金红石矿物进行了初步观察分析。由于相干区非常小,本文未能使用电子衍射方法进行切变面分析,而是利用高倍率显微象中切变面与(110)面的夹角来确定切变面的类型,切变层厚和化学式。一、1号样品产于河北丰宁燕山期伟晶岩中。在显微象中观察到数个直径为100—200A的区域有和(110)晶面条纹成一定角度(Φ)的粗条纹(图1),各区的Φ角都接近90°。本文作者提出:这是由于在(110)面上周期性地出现切变面所形成的,切变位移为1/2[110]。此切变面并不改变O/Ti原子数比
Rutile (TiO 2) is a common mineral, which appears in a variety of geological occurrences. This mineral is generally not considered as artificial hypoxia (TinO (?)), It does not exist non-stoichiometric conditions, so there is no crystal shear structure. In this paper, three different rutile natural rutile minerals were initially observed and analyzed. Since the coherence region is very small, we can not use the electron diffraction method to analyze the shear plane. Instead, we use the angle between the shear plane and the (110) plane in the high magnification microscopy to determine the type of shear plane. The shear layer Thick and chemical formula. One, No. 1 sample produced in Hebei Fengning Yanshan pegmatite. In the microscopic image, a number of thick stripes (Fig. 1) at an angle (Φ) to the (110) plane stripes in the region of 100-200 A in diameter were observed. Each region had a Φ angle close to 90 °. The authors propose that this is due to the periodic emergence of shear planes on the (110) plane with a shear displacement of 1/2 [110]. This cut surface does not change the O / Ti atomic ratio