Bihalide ions ClHCl- and BrHBr-. Crystal structures of cesium chloride-1/3-(hydronium bichloride) and cesium bromide-1/3-(hydronium bromide)

1968 ◽  
Vol 7 (3) ◽  
pp. 594-599 ◽  
Author(s):  
LeRoy W. Schroeder ◽  
James A. Ibers
Keyword(s):  
Crystal Structures ◽  
Cesium Chloride ◽  
Cesium Bromide

Shell-Model Lattice Dynamics of CsCl, CsBr, and Csl

1972 ◽  
Vol 50 (2) ◽  
pp. 122-128 ◽  
Author(s):  
C. Carabatos ◽  
B. Prevot
Keyword(s):  
Shell Model ◽  
Nearest Neighbor ◽  
Alkali Halides ◽  
Cesium Chloride ◽  
Cesium Iodide ◽  
Frequency Distributions ◽  
Positive Ions ◽  
Cesium Bromide ◽  
Theoretical Predictions ◽  
Model Lattice

Detailed calculations are presented for the frequency distributions and dispersion curves of the three cesium-chloride-structure alkali halides: cesium chloride, cesium bromide, and cesium iodide. In the shell model applied to the study, the polarizabilities of both negative and positive ions have been taken into account as well as the simplified next nearest neighbor interactions. Theoretical predictions and experimental data are in agreement.

High-pressure phase transition of cesium chloride and cesium bromide

2014 ◽  
Vol 16 (33) ◽  
pp. 17924-17929 ◽  
Author(s):  
Shubo Wei ◽  
Chunye Zhu ◽  
Qian Li ◽  
Yuanyuan Zhou ◽  
Quan Li ◽  
...  
Keyword(s):  
High Pressure ◽  
First Principles ◽  
Structure Prediction ◽  
Cesium Chloride ◽  
Crystal Structure Prediction ◽  
First Principles Calculations ◽  
Phase Boundaries ◽  
Cesium Bromide ◽  
High Pressure Phase Transition ◽  
Pressure Phase

Using the CALYPSO method for crystal structure prediction combined with first-principles calculations, we have investigated the high-pressure crystal structures and established the corresponding phase boundaries for the prototypical AB-type compounds of CsCl and CsBr.

CsTb3STe4 und CsTb5S2Te6: Zwei pseudo-ternäre Caesium-Terbium-Chalkogenide mit geordneten S2−- und Te2−-Anionen

2019 ◽  
Vol 74 (1) ◽  
pp. 99-107 ◽  
Author(s):  
Falk Lissner ◽  
Stephan P. Meyer ◽  
Thomas Schleid
Keyword(s):  
Crystal Structures ◽  
Monoclinic Space Group ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Cesium Bromide ◽  
New Compounds

AbstractBy the oxidation of terbium metal with sulfur and tellurium in the presence of cesium bromide as flux at 850°C for 10 days, the first quaternary cesium terbium chalcogenides with ordered S2− and Te2− anions could be obtained as main products. The new compounds CsTb3STe4 and CsTb5S2Te6 occur as black needles. While CsTb3STe4 crystallizes in the orthorhombic space group Pnma with a=1924.08(16), b=433.61(3) and c=1493.47(13) pm for Z=4, CsTb5S2Te6 adopts the monoclinic space group C2/m with a=2146.17(18), b=431.42(3), c=1049.68(9) pm and β=102.064(3)° for Z=2. Both crystal structures are characterized by parallel cationic and anionic strands (${}_\infty ^1\{ {[{\rm{ST}}{{\rm{b}}_{\rm{3}}}]^{7 + }}\} $ and ${}_\infty ^1\{ {[{\rm{CsT}}{{\rm{e}}_4}]^{7 - }}\} $ for CsTb3STe4 as well as ${}_\infty ^1\{ {[{{\rm{S}}_{\rm{2}}}{\rm{T}}{{\rm{b}}_{\rm{5}}}{\rm{]}}^{11 + }}\} $ and ${}_\infty ^1\{ {[{\rm{CsT}}{{\rm{e}}_6}]^{11-}}\} $ for CsTb5S2Te6), all running along [010]. The cationic chains result from vertex-connected [STb4]10+ tetrahedra (d(S2−–Tb3+)=271–277 pm), whereas face-sharing bicapped trigonal or square prisms [CsTe6+2]15− or [CsTe8+2]19−, respectively, form their anionic counterparts.

Crystal Phases of Glass-Forming Mixtures

2002 ◽  
Vol 754 ◽  
Author(s):  
Julián R. Fernández ◽  
Peter Harrowell
Keyword(s):  
Crystal Structures ◽  
Finite Size ◽  
Amorphous State ◽  
Cesium Chloride ◽  
Layered Crystal ◽  
Face Centered Cubic ◽  
Glass Forming ◽  
Equimolar Composition ◽  
Face Centered ◽  
Ordered State

ABSTRACTWe compare the potential energy at zero temperature of a range of crystal structures for a glass-forming binary mixture of Lennard-Jones particles. The lowest energy ordered state consists of coexisting phases of a single component face centered cubic structure and an equimolar cesium chloride structure. An infinite number of layered crystal structures are identified with energies close to this groundstate. We demonstrate that the finite size increase of the energy of the coexisting crystal with incoherent interfaces is sufficient to destabilize this ordered phase in simulations of typical size. Specific local coordination structures are identified as of possible structural significance in the amorphous state. We observe rapid crystal growth in mixtures near the equimolar composition.

Pollutant Identification by Selected Area Electron Diffraction

1974 ◽  
Vol 32 ◽  
pp. 532-533
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson ◽  
C. W. Walker
Keyword(s):  
Thermal Treatment ◽  
Electron Diffraction ◽  
Sample Preparation ◽  
Crystal Structures ◽  
Water Samples ◽  
Environmental Samples ◽  
Short Review ◽  
Selected Area Electron Diffraction ◽  
Multiple Component

Selected area electron diffraction (SAD) has been used successfully to determine crystal structures, identify traces of minerals in rocks, and characterize the phases formed during thermal treatment of micron-sized particles. There is an increased interest in the method because it has the potential capability of identifying micron-sized pollutants in air and water samples. This paper is a short review of the theory behind SAD and a discussion of the sample preparation employed for the analysis of multiple component environmental samples.

The Imaging of Crystal Structures and Crystal Defects

1978 ◽  
Vol 36 (3) ◽  
pp. 207-217
Author(s):  
J.M. Cowley
Keyword(s):  
Electron Microscope ◽  
Crystal Structures ◽  
Phase Contrast ◽  
Crystal Defects ◽  
Atom Density ◽  
Lack Of Information ◽  
Spatial Frequencies

The problem of "understandinq" electron microscope imaqes becomes more acute as the resolution is improved. The naive interpretation of an imaqe as representinq the projection of an atom density becomes less and less appropriate. We are increasinqly forced to face the complexities of coherent imaqinq of what are essentially phase objects. Most electron microscopists are now aware that, for very thin weakly scatterinq objects such as thin unstained bioloqical specimens, hiqh resolution imaqes are best obtained near the optimum defocus, as prescribed by Scherzer, where the phase contrast imaqe qives a qood representation of the projected potential, apart from a lack of information on the lower spatial frequencies. But phase contrast imaqinq is never simple except in idealized limitinq cases.

Transmission electron microscope studies in special ceramics

1978 ◽  
Vol 36 (1) ◽  
pp. 268-269
Author(s):  
A. Zangvil ◽  
L.J. Gauckler ◽  
G. Schneider ◽  
M. Rühle
Keyword(s):  
Phase Diagrams ◽  
Crystal Structures ◽  
Thin Foil ◽  
Limited Extent ◽  
Complex Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Electron Microscopes ◽  
Lattice Resolution

The use of high temperature special ceramics which are usually complex materials based on oxides, nitrides, carbides and borides of silicon and aluminum, is critically dependent on their thermomechanical and other physical properties. The investigations of the phase diagrams, crystal structures and microstructural features are essential for better understanding of the macro-properties. Phase diagrams and crystal structures have been studied mainly by X-ray diffraction (XRD). Transmission electron microscopy (TEM) has contributed to this field to a very limited extent; it has been used more extensively in the study of microstructure, phase transformations and lattice defects. Often only TEM can give solutions to numerous problems in the above fields, since the various phases exist in extremely fine grains and subgrain structures; single crystals of appreciable size are often not available. Examples with some of our experimental results from two multicomponent systems are presented here. The standard ion thinning technique was used for the preparation of thin foil samples, which were then investigated with JEOL 200A and Siemens ELMISKOP 102 (for the lattice resolution work) electron microscopes.

The Fine Structure of Replicating Simian Adenoviruses in LLC-MK2

1968 ◽  
Vol 26 ◽  
pp. 220-221
Author(s):  
Matias Pardo ◽  
Malcolm Slifkin ◽  
Leonard Merkow ◽  
Marie Sanchez
Keyword(s):  
Tissue Culture ◽  
Post Infection ◽  
Cesium Chloride ◽  
Longitudinal Section ◽  
Tubular Structures ◽  
Virus Particles ◽  
Ultrastructural Studies ◽  
Culture Cells ◽  
Simian Adenovirus ◽  
Infectivity Titer

The simian adenoviruses SV20, SV30 and SA7 have been found to be oncogenic in the Syrian hamster. The growth characteristics and replicative cycle of these viruses in tissue culture therefore appeared appropriate to investigate. Cesium chloride purified simian adenovirus with an infectivity titer of 100 TCID50, was inoculated into monolayers of LLC-MK2 cells. Cells were fixed in osmium tetroxide and embedded for ultrastructural studies at 1, 3, 6, 9, 18, 24, 48, 72, 120 and 192 hours post-infection.At the first hour post-infection, virus particles were adsorbed to the plasmalemma and found within the peripheral cytoplasm of many LLC-MK2 cells (Fig. 1). Although the first detection of infectious virus occurred at 14 hours and infectivity titers did not reach a maximum until 30 hours, intranuclear virus particles were observed by 3 hours in typical adenovirus crystalline array (Fig. 2) by means of electron microscopy. These typical honeycomb arrayed virus particles at 3 hours provided evidence of significant replication in approximately 5 percent of tissue culture cells examined. Simultaneously, a classical nuclear inclusion manifested by peripheral condensation of nuclear chromatin was evident by light microscopy. As early at 6 to 9 hours, unusual intranuclear concentric membranes formed “tubes” which contained linear arranged virus particles (Fig. 3). In transverse or tangential sections, these “tubes” appeared cochlear-like in shape. In longitudinal section, these intranuclear tubular structures contained individual virus particles at various stages of maturation in a linear arranged order. This arrangement resembled “peas in a pod”.

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