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1982年笔者在河北符山矿镁矽卡岩的裂隙中发现了碳硅钙石,具完好的板状晶体,发育有{100},{101},{120},{201}等单形。Ng=1.628,Nm=1.615,Np=1.609,(+)2V=67°;比重为2.76;空间群I2/m;a_o=10.1206,b_o=15.2058,c_o=6.6345;β=100°37′;Z=2.结构式为(Ca_(7.03)Fe_(0.01)Mn_(0.01)K_(0.002))〔Si_6O_(18)〕_(0.98)(CO_3)_1.06·2.1 H_2O,主要X—射线衍射线为3.02(100),2.99(80),2.78(35),2.49(40),1.896(40)。红外光谱有21个吸收带,CO_3群的伸缩振动谱带有明显分裂。DTA曲线表现有240℃及757℃两个吸热谷及895℃的放热峰。该地产出的碳硅钙石是矽卡岩晚期的低温热液矿物,与方解石,钙沸石,雪硅钙石,吉水硅钙石和硅灰石产膏等共生。 相似文献
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化学成分式参考文献锗石阿硫锡铅矿砷钮铅铀矿轻硅铁锰石碱钒石氟碳铝钠石钮黄锑华多水硅钙锰石钙贝塔石锡铜把矿抒锗铁铝石水硼铝钙矾水硅锰钙被石铬镁电气石ArgutiteAschamal二刀iteGe 02PboBi:匀(Pb,Ba)(Uo:)6(Bio)一〔(A:,p)o‘〕2(OH)1,·3HZO(Mg,卜ez争一于e,+,M”2+,口)‘2511。(0,OH).0(Na,K)xv亮+v息叙01。(o。90>x>0 .54)Na7AIH:(CO:)一卜:卜e告寸。;Bi里户::Sb:.。。o;caM。盒+51:o,。·7H:o(Ca,La,Th,U),(Nb,Ta,Ti)20PdZ Cu Sn卜eZ+Al:GeO:(OH):Ca6(AI,51)2(50‘)2(B(OH)O(OH,0)l:·26H20Ca Mn I3eZS… 相似文献
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矿物名称英文名称化学成分式参考文献砷钮铝石ArsejlogoyazitS,AIJ(AsQ‘);(OH)、·H:OSchweiz Minp已tro Mitt64 11一19铁钒矿经砷钙披石硫铱锗矿水轻砷铝石氯锢碱矾水锑铝铜石硅钾钦石料方锰顽辉石督三水铝石褐磷锰高铁石BerdesillskiiteBerg,logir己BowieiteBulaehiteC孟一latiiteCualstibit:VZTIOSCo Ue AsO,(OH)(Rh,lr。Pr)2匀A12(Aso。)(OH):·3H2妇K一Cti;O:(50‘).MeCI(Me:N。&/or Cu)CuoAIssb吕01:·16H20KZI‘151502￡Ti一analogue of Dalyile(Mn,Mg)Mg 512场A;(oH)3 a.、。w polymorph ofA!(011):M,12… 相似文献
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单斜钠钙石(Na_2CO_3·CaCO_3·5H_2O)是自然界产出的含水碳酸盐矿物,最早发现于委内瑞拉。晶体结构分析用的单斜钠钙石晶体采自吉林省乾安县大麻苏盐硷湖,其结晶形态与矿物学研究工作,由长春地质学院何绍武、郑松彦同志完成。 相似文献
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采用无机盐溶胶-凝胶法制备了颗粒均匀的形态为针状的(Eu2+,Dy3+)SrAl2O4纳米粉体.通过TG-DTA分析和X射线衍射和扫描电镜分析方法,对样品进行了微观结构和表面形态的表征.研究了纳米(Eu2+,Dy3+)SrAl2O4粉体在不同烧结温度下固相反应过程和成相规律.实验结果表明,当样品的烧结温度为500 ℃时是单一的Sr(NO3)2晶相;750 ℃左右生成了Sr3Al2O6,并伴有少量SrAl2O4晶体;1 100 ℃是生成了结晶度良好的针状纳米(Eu2+,Dy3+)SrAl2O4粉体.通过计算,样品粉体晶粒平均为80～100 nm.该晶体粒度随烧结温度升高而逐渐变大. 相似文献
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二水硫酸钙结晶动力学研究 总被引：1，自引：0，他引：1
主要研究了过饱和溶液中CaSO4 ·2H2 O晶体成核及生长现象 ,同时对垢的形成机理进行了探讨。实验表明 ,成核延迟时间随溶液过饱和度增大而减小 ;CaSO4 ·2H2 O晶体生长属于表面反应控制 ,且与粒径相关 ,当温度为 3 0℃ ,粒径为2 8～ 67μm ,Ca2 + 浓度为 0 .0 3 5mol/L时 ,晶体生长速度在 0 .5× 10 - 8～ 5 .8× 10 - 8m/s之间 相似文献
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以氧化钙为反应物料,在200～250℃的水热反应条件下分解钾长石。实验研究了在不同的Ca/(Si Al)摩尔比、水固比、反应温度和反应时间条件下,钾长石中K2O的溶出率和固相的物相变化。结果表明,液相中K2O的溶出率为40%～87%,固相反应产物为结晶良好雪硅钙石晶体。采用化学分析、XRD、SEM、DSC_TG和BET等方法对合成的雪硅钙石粉体进行了表征,结果表明,合成的雪硅钙石粉体是由长5～10μm、宽100～200nm、厚度为49～50nm的薄片纤维晶体交织成的直径为30～40μm的空心球形团聚体,耐火温度高于650℃,是制备硅酸钙保温材料的良好原料。 相似文献
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硅酸盐体系的化学平衡:(2)反应热力学 总被引：6，自引：4，他引：6
通过具体的应用实例,系统介绍了在矿物材料学研究中硅酸盐体系的多相平衡反应热力学的基本原理。对硅酸盐体系的典型多相平衡反应进行了热力学计算,包括:(1)微晶玻璃制备过程中的硅酸盐熔融反应;(2)霞石正长岩和高铝粉煤灰利用技术中的硅酸盐烧结反应;(3)S iO2-CaO-H2O体系和KA lS i3O8-CaO-H2O体系雪硅钙石、硬硅钙石的水热晶化反应;(4)高铝粉煤灰和霞石正长岩烧结产物的溶解反应;(5)Na[A l(OH)4]-A l(OH)3-H2O体系和Na2SO4-Ca(OH)2-H2O体系中α-A l(OH)3和CaSO4.2H2O的析晶反应。研究成果可望对矿物材料制备实验方案设计、工业生产过程优化及改进产品性能提供理论指导,同时为同类材料学研究提供借鉴。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献
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正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献
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正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.) 相似文献