Crystallographic Evidence for the Formation of a Continuous Series of Mixed Crystals between NiO and LiNiO2

2003 ◽  
Vol 15 (4) ◽  
pp. 988-993 ◽  
Author(s):  
H. Wulff ◽  
M. Mohan Rao ◽  
F. Scholz
Keyword(s):  
Mixed Crystals ◽  
Continuous Series

Isomorphic Co-Crystallization of Ammonium and Rubidium Bromocarnallites

1994 ◽  
Vol 59 (8) ◽  
pp. 1815-1819 ◽  
Author(s):  
Christomir Christov ◽  
Christo Balarew ◽  
Stefka Tepavitcharova
Keyword(s):  
Distribution Coefficients ◽  
Mixed Crystals ◽  
Solubility Isotherm ◽  
Continuous Series ◽  
Liquid Phases

The solubility isotherm of the system NH4Br.MgBr2.6 H2O - RbBr.MgBr2.6 H2O - H2O has been investigated at 75 °C and formation of a continuous series of mixed crystals is established. The factors determining the values of the distribution coefficients of the components between the crystalline and liquid phases are discussed.

Electrochemical preparation and properties of the mixed-crystalline hexavanadates MxM′4−xV6O16, M, M′ = NH4, K, Rb, Cs

1990 ◽  
Vol 68 (8) ◽  
pp. 1283-1292 ◽  
Author(s):  
E. Andrukaitis ◽  
P. W. M. Jacobs ◽  
J. W. Lorimer
Keyword(s):  
Chemical Analysis ◽  
Alkali Metal ◽  
Mixed Crystals ◽  
Continuous Series ◽  
Alkali Metal Cations ◽  
X Ray Diffraction ◽  
Ammonium Ions ◽  
Electrochemical Preparation ◽  
X Ray ◽  
End Members

Coherent deposits of oriented, crystalline MxM′4−xV6O16+δ, with M, M′ = K, Rb, Cs, or NH4, 0.0 ≤ x ≤4.0 and 0.00 ≤ δ ≤ 0.13, have been prepared electrochemically on various conducting substrates from metavanadate solutions containing ammonium or alkali metal cations, singly or in combination. Chemical analysis and X-ray diffraction show that the deposits consist of a continuous series of mixed crystals based on the isomorphic end members M4V6O16 and M′4V6O16.The deposits can be oxidized electrochemically, with removal of M and M′ atoms, and the products can be used as cathodes for insertion of lithium, with the largest capacity achieved about 1.0 mol% of total vanadium. Cycling of the electrodes improves capacity, with insertion of lithium reaching 25 mol% of total vanadium. This gain in capacity results from further removal of alkali metal or ammonium ions from the electrode during the oxidation step of the cycling process.The results extend the range of composition of homogeneous phases in the system (NH4)2O–K2O–V2O4–V2O5. Keywords: alkali metal hexavanadates, electrochemical preparation.On a préparé des dépôts cohérents qui contiennent des cristaux orientés de MxM′4−xV6O16+δ, avec M, M′ = K, Rb, Cs ou NH4, 0,0 ≤ x ≤4,0 et 0,00 ≤ δ ≤ 0,13, par la méthode de voltammétrie cyclique sur des substrats divers et dans des solutions de metavanadates qui contiennent des cations des métaux alcalins ou d'ammonium seuls ou des combinations de tels ions. L'analyse chimique et la diffraction des rayons X ont démontré que les dépôts comprennent une série continue de cristaux mixtes basée sur les membres terminaux M4V6O16 et M′4V6O16.

scholarly journals A spectro-photometric comparsion of the emissivity of solid liquid copper and of liquid silver at high temperatures with that of a full radiator

1913 ◽  
Vol 88 (602) ◽  
pp. 195-205 ◽  
Keyword(s):  
High Temperatures ◽  
Liquid Copper ◽  
Freezing Point ◽  
Mixed Crystals ◽  
Continuous Series ◽  
Type I ◽  
Melting Points ◽  
Liquid Silver ◽  
Pure Substances ◽  
Solid Liquid

The following paper is a continuation of two previous papers in which the melting- and freezing-point curves for two pairs of substances, each of which forms mixed crystals, have already been determined. In the first of these papers* mixtures of naphthalene and β -naphthol were examined and found to form a continuous series of mixed crystals and to give curves of Roozeboom’s Type I, in which the melting points of the pure substances.

scholarly journals On the spontaneous crystallisation and the melting- and freezing-point curves of two substances which form mixed crystals and whose freezing-point curve exhibits a transition point. -Mixtures of p -bromnitrobenzene and p -chlornitrobenzene

1913 ◽  
Vol 88 (602) ◽  
pp. 205-216
Keyword(s):  
Transition Point ◽  
Freezing Point ◽  
Mixed Crystals ◽  
Continuous Series ◽  
Type I ◽  
Melting Points ◽  
Freezing Points ◽  
Point Curve ◽  
Pure Substances

The following paper is a continuation of two previous papers in which the melting- and freezing-point curves for two pairs of substances, each of which forms mixed crystals, have already been determined. In the first of these papers mixtures of naphthalene and β -naphthol were examined and found to a form a continuous series of mixed crystals and to give curves of Roozeboom's Type I, in which the melting and freezing points of all mixtures lie between the melting points of the pure substances.

scholarly journals On the spontaneous crystallisation and the melting and freezing point curves of mixtures of two substances which from mixed crystals and posses a minimum or eutectic freezing point. —Mixtures of azobenzene and benzylaniline

1910 ◽  
Vol 84 (571) ◽  
pp. 344-369 ◽  
Keyword(s):  
Freezing Point ◽  
Eutectic Point ◽  
Mixed Crystals ◽  
Continuous Series ◽  
Melting Points ◽  
Point Curve ◽  
Series Of Experiments ◽  
Pure Substances ◽  
New Feature

The behaviour of mixtures of naphthalene and β-naphthol has already been investigated, and the freezing and melting point curves and the curve of spontaneous crystallisation for these mixtures described.* These substances were found to form a continuous series of mixed crystals, on a curve of Roozeboom’s Type 1, the melting and freezing points of all the mixtures lying between the melting points of the pure substances. The behaviour of mixtures of monochloracetic acid and naphthalene was also investigated, for it was stated by Cady that these substances form mixed crystals of Roozeboom’s Type 5, whose melting and freezing point curves exhibit a minimum or eutectic freezing point. Experiments were therefore made with these substances with the object of determining the form of the curve of spontaneous crystallisation, or supersolubility curve, for mixtures of this type. No sign of the formation of any mixed crystals was observed, however, in a lengthy series of experiments, and it was shown that naphthalene and monochloracetic acid give the ordinary V-shaped freezing point curve for the solutions of two substances in each other, similar to that already obtained for mixtures of salol and betol,§ the only new feature being introduced by the existence of three modifications of monochloracetic acid. The monochloracetic acid and naphthalene mixtures having thus failed as an example of mixed crystals possessing a minimum or eutectic freezing point, another attempt was made to obtain a pair of substances with convenient melting points which form mixed crystals and possess the melting and freezing point curves with minimum eutectic point characteristic of Roozeboom’s Type 5.

Evaluation of single-electron movies of glutamine synthetase molecules

1983 ◽  
Vol 41 ◽  
pp. 280-281
Author(s):  
W. Kunath ◽  
E. Zeitler ◽  
M. Kessel
Keyword(s):  
Electron Microscope ◽  
Glutamine Synthetase ◽  
Electron Irradiation ◽  
Structural Damage ◽  
Structural Changes ◽  
Single Electron ◽  
Continuous Series ◽  
Digital Recording ◽  
Recording Device ◽  
Low Exposure

The features of digital recording of a continuous series (movie) of singleelectron TV frames are reported. The technique is used to investigate structural changes in negatively stained glutamine synthetase molecules (GS) during electron irradiation and, as an ultimate goal, to look for the molecules' “undamaged” structure, say, after a 1 e/Å2 dose.The TV frame of fig. la shows an image of 5 glutamine synthetase molecules exposed to 1/150 e/Å2. Every single electron is recorded as a unit signal in a 256 ×256 field. The extremely low exposure of a single TV frame as dictated by the single-electron recording device including the electron microscope requires accumulation of 150 TV frames into one frame (fig. lb) thus achieving a reasonable compromise between the conflicting aspects of exposure time per frame of 3 sec. vs. object drift of less than 1 Å, and exposure per frame of 1 e/Å2 vs. rate of structural damage.

Direct 2D calculation of quantized DOEs on the basis of a continuous series approach

1997 ◽  
Vol 44 (4) ◽  
pp. 685-696 ◽  
Author(s):  
L. L. DOSKOLOVICH , P. PERLO , O. I. P
Keyword(s):  
Continuous Series
Sign in / Sign up

Export Citation Format

Share Document