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vii, 53 pages : 30 cm
Topics: Alkali metals, Alkaline earth metals, Alkali & alkaline earth metals - For schools
This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)
Topics: Alkalies, Alkaline earth metals
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08/13
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Chase, Malcolm W.
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Topics: Alkaline earth metals., Thermochemistry.
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Halka, Monica
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xxxv, 172 p. : 25 cm
Topics: Alkalies, Alkaline earth metals, Periodic law
Thesis (B.S.)--University of Illinois, 1909
Topics: Alkalies, Alkali metals, Alkaline earth metals, Electrochemical analysis, Theses
A method for purifying ceramic powder for electronic parts is described. Impurities can be easily removed by this method. Alkaline metals are removed from ceramic power for electronic parts.
Topics: NASA Technical Reports Server (NTRS), CERAMICS, ELECTRONIC EQUIPMENT, IMPURITIES, POWDER...
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Saunders, N. (Nigel)
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Provides an overview of the periodic table, particularly calcium and the alkaline earth metals, describing where these elements are found, how their atomic number is assigned, and uses for each element
Topics: Metals, Children's Books/Young Adult Misc. Nonfiction, Children: Grades 2-3, Science & Nature -...
Photometric investigations are reported in laminar, premixed shielded flames above the reaction zone, burning at atmospheric pressure. In these CO/ N2/O2 - C2H2/N2/O2 - and H2/O2/N2 - flames metal vapor was introduced. Flame temperatures ranged from 2000 to 2500K, rise-velocities from 5 to 15 m/sec. The question is discussed as to what extent thermodynamic equilibrium does exist in (certain parts of) the flame. The meaning of (local) flame temperature and its relation to calculated adiabatic...
Topics: DTIC Archive, Hollander, Tj, CALIFORNIA UNIV SANTA BARBARA DEPT OF PHYSICS, *ALKALINE EARTH METALS,...
We present a unifying theoretical framework that describes recently observed many-body effects during the interrogation of an optical lattice clock operated with thousands of fermionic alkaline earth atoms. The framework is based on a many-body master equation that accounts for the interplay between elastic and inelastic p-wave and s-wave interactions, finite temperature effects and excitation inhomogeneity during the quantum dynamics of the interrogated atoms. Solutions of the master equation...
Topics: DTIC Archive, CALIFORNIA INST OF TECH PASADENA INST FOR QUANTUM INFORMATION, *ATOMIC CLOCKS,...
A colorimetric method for analysis of micro components in silicon carbide used as the raw material for varistors is described. The microcomponents analyzed included iron soluble in hydrochloric acid, iron, aluminum, calcium and magnesium. Samples were analyzed by the method, and the results for iron and aluminum agreed well with the N.B.S. standard values and the values obtained by the other company. The method can therefore be applied to the analysis of actual samples.
Topics: NASA Technical Reports Server (NTRS), ALKALINE EARTH METALS, ALUMINUM, EARTH RESOURCES, IRON,...
Topics: DTIC Archive, Moore, Charlotte E, NATIONAL BUREAU OF STANDARDS BOULDER CO*, *TRANSITION METALS,...
The original goal of this project was to develop a rapid dissolution methodology for solid environmental samples and a crude pre-concentration of actinides (uranium, plutonium, thorium, americum) following the dissolution process to enable compatibility with the Automated Radionuclide Separation System-Environmental (ARSIIe) from Northstar Engineered Technologies. It was later required by the client during a subsequent meeting (August 2012, Quebec City, Quebec, Canada) that strontium be...
Topics: DTIC Archive, Michaud,Annie, Northstar Engineered Technology, LLC Madison United States, actinides,...
Summarized is research dealing with the following topics: Reactions of magnesium, calcium, strontium, and barium with NO2 and N2O carried out under crossed beam conditions; A spectral study of the chemiluminescence from these reactions--in the case of Ba + NO2 the spectra was assigned to the A - X blue- green band system of the BaO emitter; and the Use of a new technique, namely, laser-induced fluorescence with application to the detection of vibrationally excited metal oxide molecules.
Topics: DTIC Archive, Zare, Richard N, COLUMBIA UNIV NEW YORK, *ALKALINE EARTH COMPOUNDS, *ALKALINE EARTH...
A procedure based on solvent extraction with diethylhexylphosphoric acid was tested for the quantitative carrier-free separation of yttrium and the rare earth group elements from other fission products. This procedure is simpler and more rapid than the previously used cation exchange resin separations of rare earths from alkali metals and alkaline earths. Subsequent quantitative carrier-free isolation of individual rare earth fission products was accomplished by their elution from cation...
Topics: DTIC Archive, Wish, L, NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA, *FISSION PRODUCTS,...
A ceramic superconductivity part such as a wire is produced through the partial oxidation of a specially formulated copper alloy in the core. The alloys contain low level quantities of rare earth and alkaline earth dopant elements. Upon oxidation at high temperature, superconducting oxide phases are formed as a thin film.
Topics: NASA Technical Reports Server (NTRS), CERAMICS, COPPER ALLOYS, OXIDATION, SUPERCONDUCTIVITY,...
This investigation concerned the role of imperfections in solids, particularly the interactions between various types of chemical defects and be tween chemical defects and crystal defects in semiconductors. One part of the study was a theoretical analysis of substituents of Group-IV elements in compounds of elements of Groups III and V. In this work the electrical properties of GaSb with Sn as substituent were calculated from thermodynamic and other considerations. Another part of the...
Topics: DTIC Archive, Fredricks, W J, STANFORD RESEARCH INST MENLO PARK CA, *SOLID ELECTROLYTES, CRYSTAL...
In the course of studies of the AIn2S4 (A = Ca, Sr, Ba) system, a number of sulfides with metal stoichiometries near, but not necessarily equal to, 1:2 were encountered, including the new phases Ca1.2In1.9S4 and Sr0.9In2. 1S4. Indexed X-ray powder diffraction patterns of Ca3.3In6.5S13 (C Ca1.0In2.0S4. 0 ), Sr0.9In2.1S4, SrIn2S4, and BaIn2S4 are reported. All compounds have been grown as crystals from AC12-KC1 (A = Ca, Sr,Ba) fluxes. X-ray powder diffraction data indicate that this compound is...
Topics: DTIC Archive, Kipp, D O, NAVAL WEAPONS CENTER CHINA LAKE CA, *SULFIDES, *ALKALINE EARTH METALS,...
Potassium hydroxide was subjected to the products of an electrical discharge sustained in oxygen and produced both potassium peroxide and superoxide. The conversion to higher oxides was shown to strongly depend upon the particle size of KOH, the position of KOH in the discharge zone, and the operating conditions of the discharge. Similar experiments were performed with hydroxides of lithium and calcium which do not form superoxides, but are converted to peroxides. The yields of peroxides were...
Topics: NASA Technical Reports Server (NTRS), ALKALI METAL COMPOUNDS, ALKALINE EARTH METALS, ELECTRIC...
There are only few known ternary nitrides containing both transition and alkaline earth metals. Our recent research in nitrides has focused on the synthesis of ternary phases containing calcium and a transition metal; at least one new ternary compound is found in each Ca-M-N system. As part of this investigation, we report here the synthesis and properties of a new compound, CaNiN. The oxidation state of Ni(I) in CaNiN is quite unusual for a solid state compound. Formally Ni(I) exists in...
Topics: DTIC Archive, Chern, Ming Y, CORNELL UNIV ITHACA NY DEPT OF CHEMISTRY, *ALKALINE EARTH METALS,...
Using the technique of multiphoton ionization spectroscopy, we have studied Rydberg series of states in the alkaline earth atoms Ca, Sr and Ba. Long series of states not previously identified were observed and analyze using multichannel quantum defect theory.
Topics: DTIC Archive, Wynne,James J, IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS N Y, *ATOMIC...
A novel technique is introduced for the measurement of rise velocities of hot, laminar flames. The new technique is simple to implement, rapid to employ, and more accurate than previous methods based on the observation of moving heated particles. In the method, tiny individual droplets of a solution containing alkali or alkaline earth elements are repetitively introduced into the flame to be examined. The small cloud of atomic vapor which is produced upon atomization of a droplet is then...
Topics: DTIC Archive, Boss,C B, INDIANA UNIV BLOOMINGTON DEPT OF CHEMISTRY, *FLAMES, VELOCITY, AEROSOLS,...
The oxidation of Ge and Sn by various gases including N2O, has been studied by flash photolysis at room temperature and the kinetics determined. The rate of Sn + N2O is probably too slow to permit construction of a chemical laser based on this reaction. A new set of techniques involving laser pumping of alkaline earth atoms is also described which will permit the study of the kinetic behavior of their low-lying excited levels in bimolecular collisions. (Author)
Topics: DTIC Archive, Wiesenfeld,John, CORNELL UNIV ITHACA N Y BAKER LAB, *REACTION KINETICS, *OXIDATION,...
Topics: DTIC Archive, Matoush, Leroy O, ARMY MEDICAL RESEARCH AND NUTRITION LAB DENVER CO, *DRUGS,...
A thermal energy beam of helium atoms in the metastable state is used to coherently excite ions of Sr, Ca, and Ba in a Penning collision. The anisotropic excited state distributions appears as Polarized line emission from the excited ions. The degree of ion alignment may be used to determine the populations of the quasi-molecular states of the ion-atom pair. The coherent emission is also utilized to obtain Hanle signals from which the radiative decay rate of the excited ion is determined. This...
Topics: DTIC Archive, Schearer, L D, MISSOURI UNIV-ROLLA DEPT OF PHYSICS, *IONIZATION, *PARTICLE...
This technical report presents and discusses the available data and information on the electrical resistivity of alkaline earth elements (beryllium, magnesium, calcium, strontium, barium, and radium) and contains recommended or provisional reference values. The compiled data include all the experimental data available from the literature. The temperature range covered by the compiled data is from cryogenic temperatures to above the melting temperature of the elements. The recommended values are...
Topics: DTIC Archive, Chi,T C, THERMOPHYSICAL AND ELECTRONIC PROPERTIES INFORMATION ANALYSIS CENTER...
Chemiluminescence from a beam of group IIA metals traversing a scattering chamber filled with NO2 or N2O gas has been studied as a function of wavelength and pressure. The Ba + NO2 and the Ba, Sr, and Ca + N2O chemiluminescent reactions are first order in both reactants while Ca + NO2 and Sr + NO2 are quadratic in the NO2 pressure. Cross sections for beam attenuation were found. For the Ba + NO2 reaction, the chemiluminescence has been assigned to the BaO A singlet Sigma - X singlet Sigma band...
Topics: DTIC Archive, Zare, Richard N, COLUMBIA UNIV NEW YORK, *ALKALINE EARTH COMPOUNDS, *ALKALINE EARTH...
The effectiveness of several potential fuel additives in reducing the effects of sodium sulfate-induced hot corrosion was evaluated in a cyclic Mach 0.3 burner rig. The potential inhibitors examined were salts of Al, Si, Cr, Fe, Zn, Mg, Ca, and Ba. The alloys tested were IN-100, U-700, IN-738, IN-792, Mar M-509, and 304 stainless steel. Each alloy was exposed for 100 cycles of 1 hour each at 900 C in combustion gases doped with the corrodant and inhibitor salts and the extent of attack was...
Topics: NASA Technical Reports Server (NTRS), ADDITIVES, ALKALINE EARTH METALS, CORROSION PREVENTION, METAL...
Topics: DTIC Archive, Consolazio, C Frank, ARMY MEDICAL RESEARCH AND NUTRITION LAB DENVER CO, *DRUGS,...
SAXS and EXAFS were applied to study genesis of polynuclear zirconium hydroxyspecies in pillaring solutions as dependent upon the zirconium concentration, addition of alkaline-earth chlorides and aging. After the montmorillonite clay pillaring, the structure of zirconium nanopillars was characterized by applying X-ray structural analysis, UV-Vis, FTIRS of adsorbed CO and nitrogen adsorption isotherms. Main pillaring species appear to be nanorods comprised of several Zr4 tetramers. Basic...
Topics: DTIC Archive, Sadykov, V. A., Kuznetsova, T. G., Doronin, V. P., Sorokina, T. P., Kochubei, D. I.,...
Ab initio calculations at the self-consistent-field and singles plus doubles configuration-interaction level are used to determine accurate spectroscopic parameters for most of the alkali and alkaline-earth fluorides, chlorides, oxides, sulfides, hydroxides, and isocyanides. Numerical Hartree-Fock (NHF) calculations are performed on selected systems to ensure that the extended Slater basis sets employed for the diatomic systems are near the Hartree-Fock limit. Extended Gaussian basis sets of at...
Topics: NASA Technical Reports Server (NTRS), ATOMIC STRUCTURE, DISSOCIATION, ENERGY LEVELS, HARTREE...
Since Pederson reported the synthesis and cation-complexing characteristics of the crown ethers in 1967, there has been increasing interest in these compounds as complexing agents for various metal and organic cations. Many different modifications of the crowns have been made to enhance their cation-complexing properties. Some of these modifications involve the use of alkyl substituents, aromatic subcyclic units, nitrogen and/or sulfur atoms substituted for oxygen in the macroring and other...
Topics: DTIC Archive, McDaniel, Christopher W, BRIGHAM YOUNG UNIV PROVO UT DEPT OF CHEMISTRY, *COMPLEX...
A high temperature electrolytic cell which simultaneously generates oxygen at the anode and liquid alkali metals at the cathode is electrochemically characterized. The electrolytic technology being investigated utilizes the oxygen vacancy conducting solid electrolyte, yttria stabilized zirconia, which effectively separates the oxygen evolving (at La0.89Sr0.10MnO3) and alkali metal (Li, Na) reducing (from a molten salt at either Pt or FeSi2) half cell reactions. In the finally engineered cell...
Topics: NASA Technical Reports Server (NTRS), ALKALINE BATTERIES, CELL CATHODES, ELECTROCHEMISTRY, LUNAR...
Topics: DTIC Archive, Uhler, E F, RADIO CORP OF AMERICA SOMERVILLE NJ, *CATHODES(ELECTROLYTIC CELL),...
An ion exchange polymer comprised of an alkali metal or alkaline earth metal salt of a poly(carboxylic acid) in a poly(vinyl acetal) matrix is described. The polymer is made by treating a mixture made of poly(vinyl alcohol) and poly(acrylic acid) with a suitable aldehyde and an acid catalyst to cause acetalization with some cross-linking. The material is then subjected to an alkaline aqueous solution of an alkali metal salt or an alkali earth metal salt. All of the film forming and...
Topics: NASA Technical Reports Server (NTRS), ION EXCHANGING, MEMBRANES, POLYMER CHEMISTRY, POLYMERIC...
Chemical engineering approach has been employed to promote elimination of large size flaws and improve strength. A general philosophy in the program was to prepare advanced cements designated as chemically bonded ceramics and use fracture mechanics and fractography to determine the size and origin of the critical flaw. flaws of a certain type were eliminated iii subsequent materials by alteration in some stage of the processing scheme. One of the most important goals of the current program was...
Topics: DTIC Archive, Scheetz, B E, PENNSYLVANIA STATE UNIV UNIVERSITY PARK, *CEMENTS, MECHANICAL...
A gallium arsenide photo-responsive device is provided with an intermediate, transparent layer of a refractory metal or alkaline earth metal forming a tenacious bond between a non-hydroscopic oxide layer and a noble metal Schottky barrier layer. The device has a gallium arsenide substrate with a predetermined type conductivity and a gallium arsenide epitaxial layer with the same type conductivity but a lower charge carrier concentration grown on the substrate. The oxide layer is formed to cover...
Topics: NASA Technical Reports Server (NTRS), FABRICATION, GALLIUM ARSENIDES, METAL OXIDE SEMICONDUCTORS,...
The grant was initiated on May 15,1998 and was completed in August 2001. We have explored the compositions at which in-situ toughened ct-SiAlON can be obtained. This essentially encompasses the entire single a-phase region. It includes both rare-earth ion-added compositions and alkali/alkali-earth ion-added compositions. We have made a systematic effort to obtain kinetic data on phase transformation at different compositions, since this knowledge is critically important for the precise control...
Topics: DTIC Archive, Chen, I-Wei, PENNSYLVANIA UNIV PHILADELPHIA, *TOUGHNESS, *CERAMIC MATERIALS,...
This report describes work addressing the problems of collisional induced oscillator strength and energy transfer from metastable states in Group IIA alkaline earth metal atoms. The quenching of CA 3PJ states when perturbed by rare was atom collisions is investigated and such quenching is found to be negligable. The CA 1D2 state, however shows considerable collisional induced effects. Calculations have been performed which show that collision cross-sections for transfer of electronic excitation...
Topics: DTIC Archive, Cooper, J, JOINT INST FOR LAB ASTROPHYSICS BOULDER CO, *ALKALINE EARTH METALS,...
The mechanical properties of tungsten heavy metals are strongly influenced by the quality of the starting materials, especially the powders. Powders that are too coarse result in highly porous heavy metals, regardless of the sintering conditions, as, due to insufficient distribution of the binder melt, liquid phase sintering occurs only locally. A second, although different, type of porosity is caused by traces of alkaline metals or rare earths, the pores in this case being formed during liquid...
Topics: DTIC Archive, Lux,B, TECHNISCHE UNIV VIENNA (AUSTRIA) INST FUER CHEMISCHE TECHNOLOGIE ANORGANISCHER...
Series of investigaions were made on the relation between the surface conditions of high silica glass and its mechanical strength. It was found that, (1) Heavy alkaline-earth elements such as Sr Ba in alkaline solutions tend to deposit on the silica glass surface and produce severe surface cracks, reducing the mechanical strength. (2) Surface energy of the glass appears to determine the mechanical strength of high silica glass. (3) Dissolution rate of high silica glass in water increases with...
Topics: DTIC Archive, Tomozawa,Minoru, RENSSELAER POLYTECHNIC INST TROY NY DEPT OF MATERIALS ENGINEERING,...
This final report describes the work performed to advance the state-of-the-art of resin matrices required for improved ablative materials for use with high energy fluorine-containing liquid propellant systems. This was accomplished through a comprehensive theoretical and experimental study which (a) defined critical parameters controlling the effectiveness of resins in ablative systems, (b) synthesized new resins and determined critical properties of new and modified resins, and (c) recommended...
Topics: DTIC Archive, Lubowitz, H R, TRW SYSTEMS GROUP REDONDO BEACH CA, *ABLATIVE MATERIALS, *POLYIMIDE...
Methods for producing nanostructured silicon and silicon-germanium via solid state metathesis (SSM). The method of forming nanostructured silicon comprises the steps of combining a stoichiometric mixture of silicon tetraiodide (SiI4) and an alkaline earth metal silicide into a homogeneous powder, and initating the reaction between the silicon tetraiodide (SiI4) with the alkaline earth metal silicide. The method of forming nanostructured silicon-germanium comprises the steps of combining a...
Topics: NASA Technical Reports Server (NTRS), SOLID STATE, METATHESIS, NANOSTRUCTURE (CHARACTERISTICS),...
Experimental data on the absorption coefficients of alkaline earth halides were searched, compiled, and analyzed. It was found that the bulk of available data were concentrated to the absorption edges of the main transparent region and were for the four materials CaF2, SrF2, BaF2, and MgF2. An equation was formulated to best describe the absorption data in the infrared multiphonon region as a function of both frequency and temperature. Constants in the equation were determined based on data...
Topics: DTIC Archive, Li,H H, THERMOPHYSICAL AND ELECTRONIC PROPERTIES INFORMATION ANALYSIS CENTER...
Among the problems associated with long-term high temperature service of hybrid material systems is interdiffusional compatibility of the system's component materials. Efforts in this program have focussed on several area of this problem. One of the areas being examined are alkali metal and alkali earth metal diffusion barriers. These barriers are being applied by two different methods: ion implantation and a sol suspension slurry technique. For both methods, the system being utilized as a...
Topics: DTIC Archive, Tien, John K, COLUMBIA UNIV NEW YORK CENTER FOR STRATEGIC MATERIALS, *ALKALI METALS,...
Experimental studies involving the interaction of high-power lasers with alkali and alkaline-earth atoms and molecules have been carried out. The motivation for this work has been to evaluate proposed methods for using these systems to create tunable coherent light sources in the near-infrared spectral region. In addition, much fundamental information has been obtained about these atomic and molecular systems, and on their interactions with light. The work can be divided into three areas:...
Topics: DTIC Archive, Huennekens, John P, LEHIGH UNIV BETHLEHEM PA, *EMISSION, *ALKALI METAL COMPOUNDS,...
The reported investigation of cathodophosphors was undertaken in connection with the development of optical devices for the detection of long wavelength photons in which the initial photon-to-electron detection is performed by an optical diode, then the photoelectrons being accelerated by the electric field penetrate into a phosphor screen and the screen produces multiple photons which are detected by a (close coupled) photomultiplier. This report presents the results of a comprehensive...
Topics: DTIC Archive, SAN DIEGO STATE UNIV FOUNDATION CA, *CATHODOLUMINESCENCE, *INFRARED DETECTORS,...
Cyclopentadienyl rings with substituents that interlock with those of a second ring form 'encapsulated' metallocenes ((C5R5)2M) with the alkaline- earth metals (Ca, Sr, Ba). These metallocenes are conveniently manipulated, volatile, hydrocarbon-soluble sources of the metal cations, which make the compounds attractive as precursors to metal oxides and ceramics. The physical properties of the metallocenes are highly sensitive to the degree of encapsulation and to the geometry of the encapsulating...
Topics: DTIC Archive, Hanusa, Timothy P, VANDERBILT UNIV NASHVILLE TN DEPT OF CHEMISTRY, *IONS, *METALS,...
Topics: DTIC Archive, Nakamoto, Kazuo, CLARK UNIV WORCESTER MA, *INFRARED SPECTROSCOPY, *ORGANOMETALLIC...
This project was undertaken to investigate the interaction between alkaline earth atoms in the triplet state and noble gas atoms. A major effort was devoted to producing large triplet state populations via laser excitation of the singlet state and collisional transfer to the triplet state. Cross sections for this process were measured using a new technique developed in this laboratory. These cross sections were much larger than expected, probably due to molecular curve crossings with...
Topics: DTIC Archive, Wright,John J, NEW HAMPSHIRE UNIV DURHAM DEPT OF PHYSICS, *EXCITATION, *CHEMICAL...
Collisional energy transfer rates from highly excited 1P states to nearby 3P, 1D, 3D, and F states of Ca and Sr and fine-structure mixing within the metastable 3P state of Sr have been studied. Several collisional and stimulated population-transfers between the lowest 1P, 3P, 1D, and 3D, states Sr have been isolated, and energy-pooling in collisions between pairs of these energy storage states has been studied. These processes interconnect the excited-state populations and produce energy...
Topics: DTIC Archive, Leone, Stephen R, COLORADO UNIV AT BOULDER, *ALKALINE EARTH METALS, *ENERGY LEVELS,...
