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沉积岩有机质的红外光谱及其在石油有机地球化学中的初步应用 总被引：1，自引：1，他引：1
Types and degree of muturity of organic matters in sedimentary rocks as index for oil generation and evolution can be determined by infrared spectrometry. In normal cases,oil-generating rocks can be preliminarily identified by infrared spectra of solubable bitumen components. However, the spectra of condensed nuclei of aromatic hydrocarbon should be resorted to whenever the composition and structure of organic matters arc comparative complex and their degree ofmuturity are not all the same. Systematic researches of known samples show that a configuration of condensed aromatic hydrccarbon can be proposed on the basis of the index of aromatic hydrocarbon structure and the ratio of methyl and methylene to aromatic nucleus. It is evidenced by preliminary experience that oil- and coal-generating organisms can be distinguished from each other with the help of this configuration. 相似文献
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Baiyuneboite-(Ce) is a new fluor-carbonate mineral.Based on the fine data on the structure of the mineral,the factor group and normal coordinate analyses for its infrared spectrum have been carried out.The factor group analyses indicate that the site group and factor group splittings of the internal vibration bands of CO3^2- ions do not occur and that the double bands of normal modes result from two non-equal sets of CO3^2- ions in the crystal structure,The normal coordinate analyses give the stretching force constants.bend force constants and calculated frequencies of CO3^2- ions.The calculations of potential energy distribution allow us to assign v3 and v4 to the stretching vibration and the bend vibration of CO3^2- ions.respectively. 相似文献
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黄土中 微斜长石／石英、方解石／石英 及其古环境的意义 总被引：2，自引：0，他引：2
The ratios of IM/IQ (microcline/quartz) and IC/IQ (calcite/quartz) were determined by means of an infrared spectrophotometer for loess and paleosol in the Brunhes normal polarity zone in Loehuan, Shaauxi Province. On the basis of the determined values,loesses in the Lochuan section can be divided into three types in accordance with their formation mechanisms: weakly weathered soil-formation, moderately weathered soilformation and strongly weathered soil-formatian, and paleosols in the Brown series can be divided into black loam, carbonate brown earth, brown earth, leached earth and darkbrown earth. The least square evaluation of IM/IQ and IC/IQ ratios indicates a linear positive correlation between them. The ratios of IM/IQ and IC/IQ decreased with the development of weathering soil.formation and pedogenesis during the accumulation of loess. Our study shows that these ratios can be used as an effective indicator of loess- and paleospl.formation environments. 相似文献
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氟磷灰石的因子群分析 总被引：2，自引：1，他引：2
磷灰石是火成岩、变质岩和沉积岩中广泛分布的副矿物,又是组成动物骨骼、牙齿的主要成分。因此,磷灰石在地质学、医学等学科的研究方面有着重要的理论意义和实际意义。 氟磷灰石是磷灰石族矿物中最重要和最普遍的一种矿物,对它的研究有助于加深对其他磷灰石矿物的了解和认识。磷灰石的结构和类质同像置换十分复杂。虽然有过不少有关磷灰石红外光谱的文献报道,但却很少作系统的理论分析。本文旨在结构资料的基础上,运用群论方法对氟磷灰石的振动光谱进行因子群分析,给出各振动模式的数目、对称类型和红外(或拉曼)活性以及不同对称条件下内模式的相关性。 相似文献
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石膏及其热转变产物的红外光谱 总被引：5，自引：0，他引：5
本文给出了石膏及其热转变产物－－烧石膏和硬石膏的红外光谱。在晶体结构资料基础上，对石膏和硬石膏分别进行了因子群分析和位置群分析，其结果清楚地表明，理论预测的光谱与实测光谱相当一致。根据烧石膏的红外光谱和位置群分析的结果可以肯定。SO4^2-离子的位置对称性不可能是D 2，只能为C2或C1。热转变产物的红外光谱表明，石膏－－烧石膏和烧石膏－硬石膏之间的热转变温度分别为80－100℃和350－400℃。 相似文献
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彭文世 《矿物岩石地球化学通报》1986,(4)
红外光谱是矿物类质同象置换和结构研究的重要手段。如果说以往的类质同象置换研究主要是凭借成份数据加以理论推测,那么红外光谱不仅可为离子是否进入晶格提供直接证据,而且在一定条件下还可测定类质同象置换组份的含量,确定置换的结构位置。在结构研究方面,红外光谱虽不能确定原子的空章排列,但也决不是衍射法的简单补充,它可提供离子有序-无序分布、离子占位度、结构基团位置对称性和原子间作用力大小等信息。因此, 相似文献
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本文给出了产于河南和贵州的锂绿泥石红外光谱,以及光谱中各谱带的频率、吸收强度、主要谱带的归属和灼烧样品的红外光谱。这两个矿物的光谱与以前发表的锂绿泥石的光谱有差别,而和白云母、伊利石的光谱相似;文中给出了它们的鉴定特征。根据红外光谱认为,锂绿泥石的结构可能是复杂的,不含有H_2O形式的水;它更接近二八面体型结构。锂绿泥石灼烧到453℃时,OH根全部脱失,结构向非晶态转化,到800℃后,转变成莫来石、非晶态SiO_2和LiO_2。 相似文献
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