Physical properties and X-ray diffraction of a NiMn2O4 single crystal below and above the ferrimagnetic transition at Tc = 145 K

1997 ◽  
Vol 58 (5) ◽  
pp. 725-729 ◽  
Author(s):  
S. Åsbrink ◽  
A. Waśkowska ◽  
M. Drozd ◽  
E. Talik
Keyword(s):  
Physical Properties ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Investigation on Thermo-physical Properties of L-Valinium Picrate Single Crystal for Modern Applications

2021 ◽  
Author(s):  
M Manivannan ◽  
S. Balachandar ◽  
M. Jose ◽  
S A Martin Britto Dhas
Keyword(s):  
Heat Capacity ◽  
Thermal Diffusivity ◽  
Physical Properties ◽  
Single Crystal ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Thermal Effusivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermo Physical Properties

Abstract Good quality L-valinium picrate single crystal was grown by slow evaporation technique. The lattice parameters of the crystal were measured by single crystal X-ray diffraction analysis. The High resolution X-ray diffraction study reveals good crystalline perfection of the grown crystals. The thermal diffusivity and specific heat capacity were experimentally measured using photoacoustic technique and standard DSC technique, respectively. The thermo physical properties such as thermal conductivity, thermal diffusivity, specific heat capacity, volumetric specific heat capacity, and thermal effusivity of LVP are reported for the first time at ambient temperature.

The Structure and Physical Properties of μ-oxo-bis{oxotrichloro(O-perrhenylchloride)rhenium(VI)}, and the Non-existence of β-ReOCl3

1972 ◽  
Vol 50 (22) ◽  
pp. 3607-3618 ◽  
Author(s):  
C. Calvo ◽  
P. W. Frais ◽  
C. J. L. Lock
Keyword(s):  
Oxygen Atom ◽  
Infrared Spectrum ◽  
Physical Properties ◽  
Single Crystal ◽  
Least Squares ◽  
X Ray Diffraction ◽  
Full Matrix ◽  
Weak Bond ◽  
X Ray ◽  
Chloride Molecule

The compound previously reported as β-ReOCl3 has been shown by analysis and single crystal X-ray diffraction to be μ-oxo-bis{oxotrichloro(O-perrhenyl chloride)rhenium(VI)}, (Re2O3Cl6)(ReO3Cl)2. The crystals were triclinic, a = 6.112(5), b = 12.876(9), c = 6.020(5) Å, α = 88.30(5), β = 95.88(5), γ = 105.36(5)°, [Formula: see text]. Intensities were measured by a densitometer from photographs recorded on an integrating precession camera. The structure was refined by full matrix least squares to give a final R2 of 0.072. The molecule is composed of a dimeric Re2O3Cl6 unit with a bridging oxygen atom on the center of symmetry and an Re—O (bridge) distance of 1.847(1) Å. The remaining oxo-group on each rhenium is cis to the bridge and is strongly bonded (1.69(2) Å), and the position trans to the terminal oxo-group is filled by a weak bond to an oxygen atom of a perrhenyl chloride molecule. The infrared spectrum of the compound has been explained in terms of the structure.

A quinoxaline-fused tetrathiafulvalene derivative and its semiconducting charge-transfer salt: synthesis, crystal structures and physical properties

2014 ◽  
Vol 38 (5) ◽  
pp. 2052-2057 ◽  
Author(s):  
Yan Geng ◽  
Christoph Fiolka ◽  
Karl Krämer ◽  
Jürg Hauser ◽  
Vladimir Laukhin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Charge Transfer ◽  
Physical Properties ◽  
Single Crystal ◽  
Crystal Structures ◽  
Single Crystal Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Donor Acceptor ◽  
Tetrathiafulvalene Derivative

A quinoxaline-fused tetrathiafulvalene (TTF) derivative 1 has been synthesized to form a compact and planar π-conjugated donor–acceptor (D–π–A) ensemble, and its single crystal structure has been determined by X-ray diffraction.

Single Crystal Investigation and Physical Properties of the Binary Compound CeB4

2007 ◽  
Vol 62 (7) ◽  
pp. 896-900 ◽  
Author(s):  
Volodymyr Babizhetskyy ◽  
Arndt Simon ◽  
Kurt Hiebl
Keyword(s):  
Electrical Resistivity ◽  
Physical Properties ◽  
Single Crystal ◽  
Structure Type ◽  
Binary Compound ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Resistivity Measurements ◽  
Cerium Atom

Abstract The structure of CeB4 has been determined by single crystal X-ray diffraction. The compound crystallizes in the ThB4 structure type (space group P4/mbm, a = 7.2034(8), c = 4.1006(5) Å; 270 reflections with Fo ≥ 4σ (Fo), R1 = 0.023, wR2 = 0.052). The results of the magnetic and electrical resistivity measurements indicate a strong f-d hybridization of the 4 f electrons of the cerium atom

scholarly journals Crystal Growth and Physical Properties of Sr4Co3O7.5+xCl2 Single Crystals (x ∼ 0.14)

Crystals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 623
Author(s):  
Gihun Ryu ◽  
Zhiwei Hu ◽  
Chun-Fu Chang ◽  
Chang-Yang Kuo ◽  
K. Shin ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Physical Properties ◽  
Single Crystal ◽  
Single Crystal Growth ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Flux Method ◽  
X Ray ◽  
Triple Layer ◽  
X Ray Absorption

We report on the single crystal growth and physical properties of the triple-layer cobalt oxychloride Sr 4 Co 3 O 7 . 5 + x Cl 2 (x∼ 0.14) with 4-3-10 Ruddlesden–Popper type structure that was synthesized by a KCl-SrCl 2 flux method. The crystal structure was determined by means of single crystal X-ray diffraction. In this quasi two dimensional (2D) material two pyramidal CoO 5 layers and a central Co oxide layer with random oxygen deficiencies are forming the layered Co oxide blocks. These blocks are separated by Cl − -ions which are interacting via Van der Waals forces, thus, enhancing the quasi 2D nature of this compound. The soft X-ray absorption spectra at the Co-L 2 , 3 edge and O-K edge indicate that Co ions are in high spin +3 state which is in agreement with the single crystal X-ray diffraction measurements that indicate basically pyramidal oxygen environments for the Co 3 + ions in this compound.

The Preparation, Physical Properties, and Structure of Oxotetrachloroaquorhenium(VI), ReOCl4(OH2)

1972 ◽  
Vol 50 (12) ◽  
pp. 1811-1818 ◽  
Author(s):  
P. W. Frais ◽  
C. J. L. Lock
Keyword(s):  
Molecular Structure ◽  
Infrared Spectroscopy ◽  
Physical Properties ◽  
Single Crystal ◽  
Least Squares ◽  
Intensity Data ◽  
X Ray Diffraction ◽  
Full Matrix ◽  
X Ray ◽  
First Time

Oxotetrachloroaquorhenium(VI), ReOCl4•H2O, has been prepared and characterized for the first time by analysis, infrared spectroscopy and single crystal X-ray diffraction. The crystals were orthorhombic, a = 10.834(8), b = 11.089(8), c = 5.517(4) Å, Pn21a, Z = 4. Intensity data were recorded by integrating film methods and measured with a Joyce–Loebl microdensitometer, and 624 observable of the 704 measured independent reflections were given non-zero weight in the final cycle of full matrix least-squares refinement where R1 = 0.0572 and R2 = 0.0687. The molecular structure is based on a very distorted octahedron with a strongly bonded oxo-group (Re—O, 1.63(2) Å) trans (177(2)°) to a weakly bonded aquo-group (Re—O, 2.27 (2) Å). The Re—Cl distances do not differ significantly (2.29(1) Å av). The chlorine atoms are bent away from the oxo-group (angles vary from (94–102°(1)).

Electron Microscopy of Shock Loaded Polycrystalline Beryllium

1974 ◽  
Vol 32 ◽  
pp. 506-507 ◽  
Author(s):  
J. M. Galbraith ◽  
L. E. Murr ◽  
A. L. Stevens
Keyword(s):  
Electron Microscopy ◽  
Wave Propagation ◽  
Structural Change ◽  
Single Crystal ◽  
Diffraction Pattern ◽  
Shock Loading ◽  
Slip Systems ◽  
Compression Tests ◽  
X Ray Diffraction ◽  
X Ray

Uniaxial compression tests and hydrostatic tests at pressures up to 27 kbars have been performed to determine operating slip systems in single crystal and polycrystal1ine beryllium. A recent study has been made of wave propagation in single crystal beryllium by shock loading to selectively activate various slip systems, and this has been followed by a study of wave propagation and spallation in textured, polycrystal1ine beryllium. An alteration in the X-ray diffraction pattern has been noted after shock loading, but this alteration has not yet been correlated with any structural change occurring during shock loading of polycrystal1ine beryllium.This study is being conducted in an effort to characterize the effects of shock loading on textured, polycrystal1ine beryllium. Samples were fabricated from a billet of Kawecki-Berylco hot pressed HP-10 beryllium.

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

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