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1.
本矿物为新发现的钇易解石族的端员矿物-钛钇易解石,产于江西省龙南县足洞燕山期中粒白云母花岗岩及其风化壳中。矿物属斜方晶系,常呈板状或短柱状,为天然晶质体,浅黄色,粒度为0.075mm,硬度4.7,比重4.73,二轴正晶,Ng=2.248,Nm=2.212,Np=2.194,Ng-Np=0.054,2V=70°。空间群为D^162h-Pmnb,a0=0.750nm,b0=1.092nm,C0=0.5  相似文献   

2.
我国首次发现的砷钙锌石和羟砷锌石产于内蒙古自治区额济纳旗老硐沟金矿脉氧化带矿石的空洞中。砷钙锌石多呈半自形或自形晶体,绿或淡绿色,透明,比重4.32(计算)。Ng=1.778,Nm=1.760,Np=1.756,二轴晶(+),2V=46°。化学分子式为Ca0.99(Zn0.94Cu0.07)1.01[(AsO4)0.97(CO3)0.03]1.00(OH),其中(CO3)2-取代部分(AsO4)3-为红外光谱分析所证实,这不同于国外报道的砷钙锌石。据X射线粉末衍射分析的主要谱线,计算得其晶胞参数:a=0.7473nm,b=0.9017nm,c=0.5916nm。羟砷锌石常呈集合体或单个晶体产出,淡黄绿色或无色,透明,比重4.44(计算)。Ng=1.761,Nm=1.738,Np=1.719,二轴晶(+),2V=87°。化学分子式为(Zn1.97Ca0.02)1.99(AsO4)(OH)。据X射线粉末衍射分析的主要谱线,计算得其晶胞参数:a=0.8304nm,b=0.8516nm,c=0.6054nm。氧化矿石的主要矿物组合为:臭葱石+褐铁矿+针铁矿+砷钙锌石+羟砷锌石+自然金+自然银+石英+方解石+蛋白  相似文献   

3.
用强功率四圆单晶衍射仪精确地修正了氟碳铈矿和氟铈矿的晶体结构.氟碳铈矿(bastnaesite,Ce(CO3)F)属六方晶系,其晶胞参数为:a=0.71438(9)nm,c=0.9808(2)nm,γ=120°,Z=6,空间群P6-2c.使用367个(F≥3σ(F))独立衍射点,经多轮最小二乘法修正后,最终获得偏离因子R=0.0499.氟碳铈矿的晶体结构特征表现为[CO3]平面三角形平行c轴分布,铈的配位数为9,Ce-O(F)平均键长为0.2515nm,C-O平均键长0.1327nm,每个氟原子与周围三个铈原子相连.氟铈矿(fluocerite,CeF3)属六方晶系,其晶胞参数为:a=0.71412(21)nm,c=0.72989(21)nm,γ=120°,Z=6.其空间群为:P3-c1(No.165).使用321个(F≥3σ(F)))独立衍射点,经多轮最小二乘法修正后,最终获得偏离因子R=0.0542.氟铈矿的晶体结构表现为每个氟原子与周围三个铈原子相连接,每个铈原子与周围9个氟原子相连,铈的配位数为9,Ce-F平均键长为0.2468nm.  相似文献   

4.
冯泳兰 《岩矿测试》1999,18(4):311-313
研究了新合成的1-(2-羟基-3,5-二硝基苯基)-3-「4-(苯基偶氮)苯基」-三氮烯(HDNPAPT)试剂与铜的显色反应。在乳化剂OP存在下,PH11.0的Na2B4O7-NaOH介质中,铜与HDNPAPT形成的红色配合物,其组成比为1:2,λmax=540nm,表观摩尔吸光系数ε540=1.73×10^5L·mol^-1·cm^-1,铜的质量浓度在0 ̄360μg/L符合比尔定律。方法应用于大  相似文献   

5.
在对辽宁省宽甸县花园沟硼矿床的研究中,发现了硼铝镁石,它与遂安石、袁复礼石、硬石膏等并生,产于硼矿体中.硼铝镁石是一种比较稀少的硼酸盐矿物,为此,对其进行了矿物特征的研究.硼铝镁石为黄色,粒状;晶体形态呈短柱状和权状,类似于橄榄石的晶体形态,弱多色性、Ng-淡黄、Np-近于无色;折射率Ng=1.7076,Np=1.6708,Nm=1.6962;-2V=54°,H=6-7,VHN100=1215kg/mm2;D测=3.50.化学成分除Al和Mg外,其次是Fe2+和Fe3+,且Fe2+>Fe3+晶体化学式为:晶体结构属斜方晶系,空间群pnma,a=9.893(6)A,b=5.076(4)A,c=4.335(3)A,Z=4.成因分析表明,硼铝镁石富Al、Mg、B,经角闪岩相区域变质作用形成.  相似文献   

6.
本文研究了在非离子表面活性剂Tritonx-100存在的情况下,邻氯苯基荧光酮(O-Cl-PF)与钛的显色反应。试验表明,在0.10~0.14mol·L ̄(-1)H_2SO_4介质中,O-Cl-PF与钛形成灵敏度极高的红紫色配合物,其最大吸收峰位于540nm处,表现摩尔吸光系数为1.8×10 ̄5L·mol ̄(-1)·cm ̄(-1),钛含量在0~3μg/25ml范围内服从比尔定律。该方法用样少,操作简便,灵敏度高,选择性好,适于测定地质样品中的微量钛。  相似文献   

7.
本合成了新显色剂2-(8-喹啉偶氮)-咪唑(QAI)测定了试剂的离解常数。研究了QAI与CO(Ⅱ)的显色反应,在pH3.0~7.0的缓冲介质中,QAI与CO(Ⅱ)形成1:3的红色配合物,λmax=530nm表面摩尔吸光系数ε=3.67×10^4L.mol^-1.cm^-1,钴量在0~25μg/25ml范围内符合比耳定律,该法的优点是选择性高和操作简便,做了较大量的Cu(Ⅱ),Ni(Ⅱ),Fe(Ⅱ  相似文献   

8.
本文研究了PAN-S与锰的显色反应。配合物的最大吸收峰位于538nm波长处,表观摩尔吸光系数为2.9×10 ̄4L·mol ̄(-1)·cm ̄(-1),锰量在0─1.6μg/ml范围内符合比尔定律,方法用于水和河泥中微量锰的测定,结果良好。  相似文献   

9.
研究了新合成的meso-四(2-磺酸萘基)卟啉(TNPS4)与Mn^2+的显色反应。在pH8.0的Na2B4O7-HCl缓冲溶液中,TNPS4与Mn^2+形成稳定的配合物,最大吸收波长470nm,配合物组成为TNPS4:Mn^2+=2:1,表观摩尔吸光系数ε=1.03×10^5L·mol^-1·cm^-1,线性范围0.0-5.0μgMn^2+/25ml。用于化探样品中Mn的测定,结果令人满意。  相似文献   

10.
新型卟啉显色剂TDMAPTPS与钯的显色反应研究   总被引:4,自引:0,他引:4  
研究了新型水溶性卟啉显色剂TDMAPTPS与钯的显色反应,在pH为3.4~5.0缓冲溶液中,适量VC,OP,SDBS存在,Pd(Ⅱ)与显色剂形成1:1稳定配合物,λmax=413nm,ε=1.65×10^5L.mol^-1.cm,Pd(Ⅱ)浓度在0~3.2μg/10mL之间服比尔定律。该方法用于实际样品测定,结果满意。  相似文献   

11.
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   

12.
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.  相似文献   

13.
PALEONTOLOGY     
正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)  相似文献   

14.
正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)  相似文献   

15.
正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)  相似文献   

16.
PETROLOGY     
正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,  相似文献   

17.
正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an  相似文献   

18.
正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of  相似文献   

19.
正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37  相似文献   

20.
正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.)  相似文献   

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