FeCl_3—石墨层间化合物的结构及电化学性能研究     

龙光明  康永峰 《盐湖研究》1998,(Z1)

通过直接反应法制备了插入浓度不同的五种FeCl3石墨层间化合物。X射线粉末衍射分析指出它们分别为一阶、二阶和三阶石墨层间化合物,IcA）分别为9．39、13．4、14．92。通过循环伏安法对不同插入浓度的一阶层间化合物的电化学性能进行了研究。  相似文献   

Mineral matter in coals and their reactions during coking     

Mihaela Grigore  Richard Sakurovs  David French  Veena Sahajwalla 《International Journal of Coal Geology》2008,76(4):301-308

Degradation of coke in the blast furnace is influenced by its inherent mineral matter, the formation of which is itself dependent upon the nature of the coal mineral matter. To date few studies have been made of coke mineralogy and its relationship to the mineralogy of the parent coal. In this study the effect of carbonisation on coal mineral matter has been investigated by a detailed quantitative mineralogical examination of nine cokes and their parent coals. The quantitative analysis was performed on X-ray diffraction patterns of the mineral matter of cokes and coals, using SIROQUANT^™. Coke mineralogy and its composition varied strongly between cokes, more strongly than variations in elemental composition of the ash. The mineral matter in the studied cokes consisted of crystalline mineral phases and also significant levels of amorphous phase (ranging between 44 and 75%). Decomposition of clays such as kaolinite, montmorillonite, illite and chamosite produced the amorphous phase and some of the crystalline mineral phases such as mullite, γ-alumina, spinel, cristobalite and leucite. The type of association of mineral matter in coals had an important role in how the clays decomposed. For example, association of kaolinite with silica-bearing minerals in intimate intermixture favoured formation of mullite over γ-alumina. Akermanite and diopside result from reaction of kaolinite with associated calcium bearing minerals (calcite, dolomite or ankerite). Quartz, fluorapatite and the three polymorphs of TiO₂ (anatase, brookite and rutile) were the coal minerals that were least affected during carbonisation, as they were also found in the cokes, yet even they were affected in some cases.  相似文献   

The assessment of the hydrocarbon potential and maturity of Silurian intervals from eastern part of Moesian Platform – Romanian sector     

《Marine and Petroleum Geology》2016

The aim of this paper is the assessment of the hydrocarbon potential and maturity of Silurian intervals from the Călăraşi-Bordei Verde-Biruinţa perimeter – East Moesian Platform. All the information gathered from the wells drilled in the mentioned perimeter is used for the evaluation of the “shale gas” potential, too. This major sedimentary basin has all geological conditions for hydrocarbons generation, migration and accumulation. The main conclusions of the all geo-analyses are the following: the XRD analyses show that the samples consist of clay minerals with organic material, the organic matter contained in the samples of the wells shows widely distributed type of organoclasts. In absence of true vitrinite originating from higher plants in these Lower Paleozoic series, the various encountered organic remains consist of Tasmanites, microporous or homogeneous fragments, structured fragments of graptolites, oxidized or naturally rich in oxygen organoclasts inherited from the continent (phytoclasts, fungal remains). The maturity of the Silurian at Ţăndărei borehole is established taking into account the fluorescence of the Tasmanites and the reflectance of graptolites; the maturity increases with depth between 0.70 and 1% eq. VRo. The organic matter of Biruinţa and Călăraşi boreholes is overmature with maturity of around 1.40–1.55% at 400 m in Biruinţa and a maturity increase with depth between 1.85 and 2.05% eq. VRo in Călăraşi borehole. Those values are mainly deduced from vitrinite/graptolite correlation. According to the maturity trend deduced of Călăraşi and Ţăndărei boreholes, the high maturity of Biruinţa for such a low burial (around 400 m) indicates a possible erosion around 3400 m due to uplift. The Silurian studied samples consist of carbonated claystones with an organic matter of type II with relatively low residual TOC content: less than 1.2% weight for the overmature boreholes (Biruinţa and Călăraşi) and less than 1.6% weight in Ţăndărei borehole.  相似文献   

Mineralogical characteristics of airborne particles collected in Beijing during a severe Asian dust storm period in spring 2002   总被引：3，自引：0，他引：3  

SHAO LongYi    LI WeiJun    YANG ShuShen    SHI ZongBo & L SenLin  The State Key Laboratory of Coal Resources  Safety Mining  China University of Mining  Technology  Beijing  China  Department of Resources  Earth Sciences  China University of Mining  Technology  Beijing  China  Faculty of Environmental  Symbiotic Sciences  Prefectural University of Kumamoto  Kumamoto -  Japan 《中国科学D辑(英文版)》2007,50(6):953-959

Asian dust storm (ADS) samples were collected on March 20,2002 in Beijing,China. High-resolution field emission scanning electron microscopy with energy dispersive X-ray detector (FESEM-EDX) and X-ray diffraction (XRD) were used to study the morphology,chemical compositions,number-size dis-tributions and mineralogical compositions of ADS particles. The mineral particles were major compo-nents in the ADS samples,accounting for 94% by number. The XRD analysis indicated that the dust particles were dominated by clay (40.3%),and quartz (19.5%),followed by plagioclase (8.4%),calcite (7.5%),K-feldspar (1.5%),hematite (0.9%),pyrite (0.9%),hornblende (0.4%) and gypsum (0.3%),with a certain amount of noncrystalline materials (20.3%). Clay minerals were mainly illite/smectite mixed lay-ers (78%),followed by illite (9%),kaolinite (6%),and chlorite (7%). In addition to these main minerals,FESEM-EDX also detected some trace minerals,such as dolomite,pyrite,thenardite,as well as heavy minerals represented by rutile,ilmenite and apatite. The mineralogical compositions of the 2002-03-20 Asian dust storm and the Saharan dust plumes were similar but the clay mineralogy showed a great distinction,with the illite/smectite mixed layers being common in the Asian dust storm but illite being common in the Saharan dust plumes.  相似文献   

四川石棉县蛇纹石猫眼的红外吸收光谱研究     

卢保奇  亓利剑  夏义本 《上海国土资源》2006,(2):63-66

采用Fourier变换红外吸收光谱和X射线粉晶衍射技术对四川石棉县蛇纹石猫眼进行了研究。红外吸收光谱结果表明:四川蛇纹石猫眼可分为纤蛇纹石和叶蛇纹石两种类型,两者在(960-1100)cm-1和(3600-3690)cm-1的范围内由Si-O伸缩振动的E1类振动和OH伸缩振动表现出的红外谱带分裂强度及谱带特征存在明显的差异。在(960- 1100)cm-1间:纤蛇蚊石的红外光谱分裂成三个明显的谱带,而叶蛇纹石在此区间只有两条谱带。在570cm-1附近的红外谱带以肩状出现;OH伸缩振动区:纤蛇蚊石出现两条红外谱带,而叶蛇蚊石只出现一条红外谱带。X射线粉晶衍射结果表明:叶蛇蚊石具有d202=0．2522nm(I/I0=19)和d203=0．2430nm(I／I0=18)的特征谱线,而纤蛇纹石则具有d202、006=0．2446nm(I／I0=29)的特征谱线,d020>0．245nm近0．249 nm的特征谱线缺失。  相似文献   

糜棱岩化过程中细粒白云母多型与结晶度的演变——以郯庐断裂带南段为例   总被引：3，自引：4，他引：3  

王勇生　朱光刘国生  王道轩 《岩石学报》2004,20(6):1485-1492

郯庐断裂带南段韧性剪切带出现在大别山东缘与张八岭隆起高压变质带之上。根据韧性剪切带糜棱岩中同构造矿物组合、黑云母的存在以及长石的变形行为,推测其变形-变质温度为400-450℃。b_0值分析表明,这些糜棱岩是在低压环境下形成的。对一系列糜棱岩样品的XRD分析显示,糜棱岩中同构造细粒白云母的多型类型皆为1M 2M_1型,指示即使在400℃以上环境下1M型仍没有消失。糜棱岩化过程中不断新生的细粒白云母初始时刻为1M型,接着发生向2M、型的转变。由于新生细粒白云母的不断产生,即使在较高温度环境下形成的糜棱岩仍含有1M型。所分析糜棱岩结晶度Kubler指数介于0.23～0.42°△2θ,多属于近变带范畴,显示其结晶程度差于实际所经历的温度。本文所测定的细粒白云母结晶度值与粒径成反比,由于糜棱岩化中细粒白云母不断的新生与结晶生长常不充分,实测的结晶度是不同时刻形成的、具不同结晶度的细粒白云母的混合结晶度。糜棱岩化过程中时间短、富流体活动、新生矿物不断发生等特性,使其中细粒白云母多型与结晶度的演变规律不同于沉积岩的甚低级变质。  相似文献   

298～873K条件下方铅矿的热膨胀系数:理论与实验的对比     

廖立兵  李锁在 《矿物学报》2004,24(1):92-94

用Ruffa法和作者提出的修正Ruffa法，分别对共价键性明显的方铅矿的热膨胀系数进行了计算。通过方铅矿高温X射线衍射实验，对298～873K条件下热膨胀系数的计算结果进行了验证。结果表明，对共价键性明显的矿物，修正Ruffa法比Ruffa法具有更高的计算精度。  相似文献   

硅灰石制备二氧化硅材料过程中的多型转变   总被引：2，自引：0，他引：2  

赵文俞  彭长琪  张清杰 《矿物学报》2004,24(4):359-365

研究了1Tr型硅灰石酸解形成二氧化硅材料过程中的多型转变和浸蚀方向。结果表明：1Tr型硅灰石在2mol／LHCl溶液中的酸解浸蚀方向严格受晶体结构控制，酸解初期晶粒首先沿{100}面方向浸蚀，结果导致衍射面的衍射强度增大；随着酸解时间的延长，[SiO4]单四面体与[CaO6]八面体共棱连接方向成为主要浸蚀方向，在XRD图谱中表现为d=0．298nm衍射蜂一直保持较大的衍射强度。特征衍射峰的相对强度变化特征表明．1Tr型硅灰石酸解形成二氧化硅过程中晶体结构发生了由1Tr型向2M型的多型转变，且酸解60min后的XRD图中各衍射峰的相对强度更接近于2M型硅灰石的衍射强度范围，其标志是d=0．299nm衍射峰成为最强衍射蜂。推测d=0．298nm左右的衍射峰强度在40min前主要来自1Tr型硅灰石的衍射面，40min以后变为2M型硅灰石的衍射面，并对1Tr型硅灰石的JCPDS 29-372卡片数据进行了讨论。  相似文献   

偏高岭石的微观结构与键合反应能力   总被引：6，自引：0，他引：6  

曹德光  苏达根  杨占印  宋国胜 《矿物学报》2004,24(4):366-372

对450～1050℃下热变高岭石结构，尤其是偏高岭石结构进行了研究。针对晶体高岭石和非晶体偏高岭石的结构特征，采用了XRD、SEM和IR等测试技术手段进行矿物组成和结构分析。采用热重GT测试方法对高岭石的热分解过程进行了研究，通过对矿物化学键合材料强度试验来表征偏高岭石的反应活性。结果发现：偏高岭石中的铝氧层是化学键合反应能力的敏感结构单元，IR谱中表征Al-O键共振的817cm^-1吸收峰与其化学键合反应能力相关联，存在该吸收峰的热变高岭石具有化学键合反应能力，相对吸收率越大，化学键合反  相似文献   

翡翠制品的无损伤鉴定     

宋大康 《甘肃地质》1994,3(2):89-94

翡翠是玉石中的珍品，其主要组成矿物是硬玉，翡翠制品中所含矿物的种类和数量是决定其真伪、质量和价值的主要因素。通过几个典型的鉴定翡翠制品的实例，系统地说明用Ｘ射线衍射分析方法无损伤鉴定翡翠制品的原理及方法，并对此进行了讨论。  相似文献