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Structure Refinement of Cs-rich Na-Li beryl and Analysis of Its Typomorphic Characteristics of Configurations

Acta Geologica Sinica(English Edition) 2007年第1期81卷 61-67页

作者： LIU Yan DENG Jun LI Guowu SHI Guanghai State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of the Ministry of Education China University of Geosciences Beijing 100083 Laboratory of Single-Crystal X-Ray Diffraction China University of Geosciences Beijing 100083

The tabular beryl found in Huya Country, Sichuan Province is a rare and special member among beryls. Chemical analysis reveals that the beryl is a new type of Cs-rich Na-Li beryl, and the content of alkalis （Li20, Na2O, K2O, Rb2O, Cs2O） is up to 2.41%. The CCD system on the SMART APEX four circle single crystal diffractometer was used in this experiment to determine the structure of the sample accurately. The beryl belongs to the hexagonal system; its space group is P6/mcc. The dimensions of the unit cell are as follows： a = 0.91961（3） nm, c = 0.91969（7） nm, c/a = 1.0000, V= 0.67357 nm3, 7 = 120°, α= 90°, β = 90°. The accurate atomic coordinates of alkali metal ions and other crystallographic parameters are also obtained： Z = 2, the calculated density D = 2.754 g/cm^3 and final R （ I 〉 2 σ （/3）= 0.046 for 5597 reflections. The crystal structure was described by coordination polyhedron. Based on the data gained, a three-dimensional graph of the crystal structure of tabular beryl was made with the ATOMS 6.0 software. The refinement of crystal structure indicates that there are two main reasons for the cause of the tabular configuration：（1） The substitution of Be by Li into the tetrahedral framework weakened the stacked six-sided rings [Si6O18]^12- of the tetrahedral Si; （2） Alkalis （mainly Na and Cs） are too large to substitute in four-fold or six-fold coordination within the structure and are accommodated in the vacant channel. The accommodation of these alkalis strengthened the structure of six-sided rings of the tetrahedral Si. And other alkali metal ions and free volatile molecules such as H2O and CO2 occupy variable positions in the channel. The equation of the electrovalence is Li＋＋Na＋→Be^2＋. According to structural and compositional differences, the monoclinic crystal of tabular beryl is considered to be a new member of the beryl group. Chemical constraints of the environment, namely, the bulk-rock chemistry and the fluid-phase composition and physical-chemica

关键词： beryl crystal structure tabular crystal typomorphic characteristics

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Effects of Metallic Ions on the Flotation of Spodumene and beryl

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Journal of China University of Mining and Technology 2007年第1期17卷 35-39页

作者： WANG Yu-hua YU Fu-shun School of Resources Processing and Bioengineering Central South University Changsha Hunan 410083 China

Effects of multivalent metallic cations, such as Ca2+ and Fe3+, on the flotation of spodumene and beryl were studied. The results show that Fe3+ and Ca2+ exhibit efficient activation on the flotation of spodumene and beryl. The ac- tivation of Fe3+ happens quite well within a pH range of 6-9 while the concentration of Fe3+ is 35 mg/L. Efficient acti- vation of Ca2+ takes place over at a pH over 11.6 at a concentration of 140 mg/L. The zeta potential of beryl and spo- dumene shifts slightly to positive values when activated by Ca2+, but markedly by Fe3+. New stretching frequencies of 1594.24 cm-1 and 1587.13 cm-1 have been found in the FTIR spectra of the two minerals after their interaction with Fe3+ and the collector. These new stretching frequencies are the asymmetric stretching frequencies of COO-(carboxyl anion), so thecollector may be chemically absorbed on the surface of Fe3+-activated beryl and spodumene.

关键词： spodumene beryl metallic ions activation flotation

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H_2O in channel of pegmatitic beryl and its hydrogen isotopic composition

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Chinese Science Bulletin 1999年第S2期44卷 38-40页

作者： ZHANG Hui, LIU Congqiang and MA Yingjun Open Laboratory of Ore Deposit Geochemistry, Intstitute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Open Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

AT present, it is universally accepted that pegmatite can be crystallized from volatile-rich peraluminousresidual granitic melt in a relatively closed environment from liquidus to solidus. However, there still exist controversies on the properties of magmatic/hydrothermal transition, the presence of an independentfluid-phase and internal evolution in the system of equilibrium, the crystallization temperature of mineralstructural zones, the time and scale of the occurrence of metasomatosis and the process of rock/fluid interaction. The method of crush-leach analysis of fluid inclusions is still widely used in the study of theproperties of magmatic/hydrothermal transition because analysis of single inclusion is limited by the techniques. Thus the result of crush-leach analysis unavoidably encounters the contamination from inclusionsof multi-generations. Recently, Taylor and Giuliani et al. successively provided some important information about the volatile evolution （mainly H2O） of pegmatite and genesis of emerald ore deposits by use

关键词： beryl mineralogy H2O in channel hydrogen isotope.

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Tribological Behavior of Copper Chilled Aluminum Alloy (LM-13) Reinforced with beryl Metal Matrix Composites

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Modeling and Numerical Simulation of Material Science 2019年第3期9卷 41-69页

作者： Joel Hemanth School of Engineering Presidency University Bangalore India

The present investigation aims at developing copper chilled aluminum alloy (LM-13) reinforced with beryl using stir casting method. Matrix alloy was melted in a composite making furnace to a temperature of about 700°C to which preheated reinforcement particles was added (3 wt.% to 12 wt.% in steps of 3 wt.%), stirred well and finally poured in to an AFS standard mold containing copper end chills of different thickness (10, 15, 20 and 25 mm) placed judiciously for directional solidification. The resulting chilled composites were subjected to microstructural, XRD, mechanical properties (strength and hardness) and tribological *** of the microstructural and XRD analysis indicate that the chilled castings were sound with good distribution and presence of all the particles. The bonding between beryl reinforcement and Al alloy matrix (LM-13) leads to excellent isotropic properties without?any shrinkage or microporosity. Mechanical characterization indicates that both strength and hardness were maximum in the case of copper chilled MMC containing 9 wt.% and 12 wt.% reinforcement respectively. Strength and hardness of chilled MMC are found to increase by 9.88% and 16.66% as compared against the matrix alloy. It is observed that because of the ceramic (beryl) reinforcement in aluminum alloy, the wear resistance of the chilled composite developed has increased with increase in reinforcement content. At lower load, chilled MMCs exhibited mild wear regime with high coefficient of friction and at higher loads they exhibited severe wear with better wear resistance compared to un-chilled composite. It is observed that the increase in mechanical properties and wear resistance are due to incorporation of beryl reinforcement, the effect of chilling that has resulted in grain refined microstructure with good bonding of the matrix and the reinforcement.

关键词： Aluminum beryl Composite Tribology

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Studies on Mechanical and Wear Properties of Al6061/beryl Composites

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Journal of Minerals and Materials Characterization and Engineering 2012年第7期11卷 704-708页

作者： Reddappa Hosur Reddappa Kitakanur Ramareddy Suresh Hollakere Basavaraj Niranjan Kestur Gundappa Satyanarayana Consulting Chief Scientist & Head Research & Development Centre BMS College of Engineering Bangalore India Department of Industrial Engineering & Management Bangalore Institute of Technology Bangalore India Department of Mechanical Engineering G.S.S. Institute of Technology Bangalore India

beryl-Al6061 alloy composites having 2-12 wt% of beryl particles were fabricated by liquid metallurgy (stir cast) method. The tensile and wear properties of beryl-Al6061 composites have been evaluated and compared with its base alloy. The results revealed that the Al6061-10 wt% of beryl composites shows an improvement of 15.38% in tensile strength and specific wear rate decreases by 8.9% at normal load of 9.81N when compared to matrix i.e. base alloy. Significant improvement in tensile properties and hardness are noticed as the wt% of the beryl particles increases. The microstructures of the composites were studied to know the uniform dispersion of the beryl particles in matrix. It has been observed that addition of beryl particles significantly improves ultimate tensile strength and hardness properties as compared with that of unreinforced matrix.

关键词： Tensile Strength Hardness Wear Al6061 beryl

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Use of Spectrographic Analyses to Characterize the Unique Features of Sodic-Lithian and Cesium-Rich Platy beryl

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地学前缘 2009年第S1期16卷 168-168页

作者： Yan Liu,Jun Deng,Liqiang Yang,Qingfei Wang State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China.

Since most beryls are characterized by prismatic configuration and originate from pegmatite and granite,platy beryl is considered especially rare. Therefore,the aims of this study are to determine the spectrographic and chemical characteristics of the platy beryl;examine the relationships between the spectrographic parameters and alkali elements and discuss the possible genesis of its platy habit based

关键词： beryl trace elements ICP vibrational spectroscopy XRD Xuebaoding Mountain

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泰雷兹beryl数字电视调制器

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卫星电视与宽带多媒体 2005年第6期 38-38页

该产品操作简单，功能强大，用于在有线系统中传送分配数字电视。因为其嵌入式的AN解码器和PCMCIA插口，beryl可以提供更多额外的服务。基于一个一体的1RU专业硬件平台，beryl融合了大量先进性能，品质更加可靠。完全符合DVB—C标准，高... 详细信息

该产品操作简单，功能强大，用于在有线系统中传送分配数字电视。因为其嵌入式的AN解码器和PCMCIA插口，beryl可以提供更多额外的服务。基于一个一体的1RU专业硬件平台，beryl融合了大量先进性能，品质更加可靠。完全符合DVB—C标准，高达256-QAM的调制性能，适用于泰雷兹的网络管理系统。

关键词：泰雷兹公司 beryl 数字电视调制器功能

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P-Li-Be Bearing Pegmatites of the South East Brazil

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International Journal of Geosciences 2012年第2期3卷 281-288页

作者： Essaid Bilal Adolf Heinrich Horn Fernando Machado de Mello Ecole Nationale Supérieure des Mines de Saint-étienne CNRS-UMR6425 Saint-étienne France IA-Departamento de Geociências da UFRRJ Rio de Janeiro Brazil IGC-UFMG Belo Horizonte Brazil

The P-Li-Nb pegmatites are located in the south of Brazil, in the states of Minas Gerais and Espirito Santos. They represent the largest pegmatite fields of Brazil and the richest in precious stones. Two types of pegmatites are characterized by their mineralogical characteristics and tectonic and magmatic relations. The first group occurred during a compressive deformation phase D1 about 582 Ma and 550℃ - 700℃ and 4 - 5 kb. The second pegmatites group was formed during the decompression phase D2 (520 - 500 Ma) of the Brasiliano metamorphic rock fusion. The geochemical parameters of the P-Li-Be bearing pegmatites of the first group show the same trend fractionation, as suggested by the mineralogical composition. The variation of tourmaline and columbite-tantalite composition of the first group game again applies a change of melt composition during the regional development of the pegmatites. A systematic compositional trend seems to suggest a petrogenetic link between the pegmatites of the region. The Fe/Mn ratio of tourmaline in samples of the first group shows the same behavior as in columbite-tantalite and garnets. The simple pegmatites are transiting north in the gem-rich pegmatites. The Fe/Mn ratio not only shows qualitatively the fractionation index, the degree of regional development, but also the internal development of the body. The ratio shows a negative correlation with lithium. The Co, Zn and Nb contents are rising at first group, but falling when starting crystallization of garnet, columbite-tantalite, and Behierit.

关键词： Gem Rich Pegmatite Phosphate Li Tourmaline beryl Triphylite Ferrisiklerite Heterosite

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Mineralogy of the Koktokay No.3 pegmatite,Altai,NW China:implications for evolution and melt–fluid processes of rare-metal pegmatites

Mineralogy of the Koktokay No.3 pegmatite,Altai,NW China:imp...

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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： QIFENG ZHOU KEZHANG QIN DONGMEI TANG CHUNLONG WANG YE TIAN PATRICK ASAMOAH SAKYI Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences Xinjiang Research Center for Mineral Resource Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences University of Chinese Academy of Sciences Department of Earth Science University of Ghana

The Koktokay No.3 pegmatite is the largest Li-Be-Nb-Ta-Cs pegmatitic rare-metal deposit of the Chinese Altai orogenic belt,and is famous for its concentric ring zonation pattern(nine internal zones)and rare-metal *** this paper,we present the results of major and trace element analysis for garnet,tourmaline,and beryl from the outer to inner zones of the No.3 *** previous studies on tourmaline and beryl,potential tracers of the degree of pegmatite evolution could be found by comparing with accepted indicators and evolutionary trends from the outer to inner zones of this *** Sc,Y,Li,Ta contents and Y/Ho value of garnet,together with the Ti,Ca,Na,Pb,Bi and REE contents of tourmaline,and the Fe,Ga and Rb concentrations of beryl could be possible tracers of the degree of evolution of *** textures and internal structures(homogeneity,oscillatory pattern,heterogeneous rims,replacement structures)of minerals in the pegmatite suggest that the rock underwent(1)rapid undercooling and crystallization after emplacement,resulting in the formation of an unidirectional solidification texture(UST),and then(2)became relatively stable,forming coarse crystals in outer zones,and finally(3)experienced disequilibrium crystallization,leading to the formation of complex internal structures of minerals in the inner zones,mainly caused by exsolution of more fluid and the formation of immiscible melts with different alkali *** evolutionary trend and the internal structures of tourmaline and beryl indicate that the formation of the Koktokay No.3 pegmatite was controlled mainly by fractional *** convex tetrad effect,nonCHARAC Y/Ho values,and extreme Eu depletion of garnet suggest that immiscibility,which is a significant mechanism during the formation of the No.3 pegmatite,occurred during *** differences in composition and internal structures of the minerals between the outer and inner zones of the No.3 pegmatite suggest

关键词： garnet tourmaline beryl EMPA LA-ICP-MS fractional crystallisation melt-fluid process Koktokay No 3 pegmatite Altai

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