Spektroskopische Untersuchungen in der Festkörperchemie, XI 127I-NQR-Untersuchungen an Perjodaten / Spectroscopic Investigations in the Solid State Chemistry, XI 127I NQR Investigations on Periodates

1977 ◽  
Vol 32 (1) ◽  
pp. 15-17 ◽  
Author(s):  
Paul K. Burkert ◽  
Frank M. Hutter
Keyword(s):  
Solid State ◽  
Unit Cell ◽  
Coupling Constants ◽  
Solid State Chemistry ◽  
Spectroscopic Investigations

A number of periodates show 127I NQR transitions. The correlation of the NQR coupling constants with the length of the unit cell was compared with the results of NQR measurements on perrhenates.

Spekktroskopische Untersuchungen in der Festkörperchemie, IX / Spectroscopic Investigations in the Solid-State Chemistry, IX

1975 ◽  
Vol 30 (3-4) ◽  
pp. 198-201 ◽  
Author(s):  
Paul K. Burkert ◽  
Frank Hutter ◽  
Detlev Koth
Keyword(s):  
Solid State ◽  
Temperature Dependence ◽  
Temperature Coefficient ◽  
Asymmetry Parameter ◽  
Lattice Parameters ◽  
Coupling Constants ◽  
Solid State Chemistry ◽  
Spectroscopic Investigations ◽  
Experimental Correlation ◽  
The Absolute

The four 185Re, 187Re—NQR-transitions of RbReO4 were measured. From the NQR-coupling constants, asymmetry-parameter and normal temperature-coefficient in the range of 77-300°K one can conclude, that the anomalons temperature dependence of the NQR-frequencies of NH4ReO4 is not caused by the absolute values of certain lattice parameters.An experimental correlation of the Re—NQR-coupling constants of scheelite-structured perrhenates with the length of the elementar cell was found and discussed.

Spektroskopische Untersuchungen in der Festkörperchemie, XII* Re-NQR-und 1H-Breitlinien-NMR -Studien an Rhenium(YII)- Sauerstoffverbindungen / Spectroscopic Investigations in Solid State Chemistry, XII* Re NQR and 1H Wideline NMR Studies on Rhenium(VII) Oxygen Compounds

1978 ◽  
Vol 33 (8) ◽  
pp. 896-898 ◽  
Author(s):  
Paul K. Burkert ◽  
Frank M. Hutter
Keyword(s):  
Solid State ◽  
Crystal Field ◽  
Coupling Constants ◽  
Solid State Chemistry ◽  
Nmr Studies ◽  
Electrical Field ◽  
Spectroscopic Investigations ◽  
Octahedral Environment ◽  
Octahedral Crystal Field

The first Re NQR spectra of rhenium oxygen compounds with rhenium atoms in the pseudo-octahedral environment of Re2O7(H2O)2 and Re2O7(H2O)2 · 2(1,4)-dioxane were found. The values of the Re NQR coupling constants of these rhenium atoms are the highest measured until now. They show, that the gradient of the electrical field is much more sensitive to distortions of an octahedral crystal field than to distortions of a tetrahedral field.

Spektroskopische Untersuchungen in der Festkörperchemie, X Re–NQR-Untersuchungen an TlReO4 und LiReO4 · 2 H2O / Spectroscopic Investigations in the Solid State Chemistry, X Re-NQR Investigations on TlReO4 and LiReO4 · 2 H2O

1976 ◽  
Vol 31 (2) ◽  
pp. 145-148 ◽  
Author(s):  
Paul K. Burkert ◽  
Frank M. Hutter
Keyword(s):  
Solid State ◽  
Solid State Chemistry ◽  
Scheelite Structure ◽  
Temperature Range ◽  
Temperature Coefficients ◽  
Spectroscopic Investigations ◽  
Asymmetry Parameters

The 187Re–NQR transitions of TlReO4 and their temperature dependencies were measured. In the temperature range, in which TlReO4 is crystallizing in pseudo scheelite structure, one obtains normal temperature coefficients with asymmetry parameters η = 0.3. For Τ < 200 Κ, however, another modification with η = 0 was found.For LiReO4 • 2 H2O complex 187Re and 185Re NQR spectra with 16 transition frequencies were measured and discussed.

Solid State Chemistry

1968 ◽  
Vol 58 (5_6) ◽  
pp. 331-332
Author(s):  
K. Hauffe
Keyword(s):  
Solid State ◽  
Solid State Chemistry

X-ray Structure Refinement and Vibrational Spectroscopy of Ca8Gd2 (PO4)6 O2

2013 ◽  
Vol 12 (10) ◽  
pp. 719-726
Author(s):  
R. Ayadi ◽  
Mohamed Boujelbene ◽  
T. Mhiri
Keyword(s):  
Solid State ◽  
General Formula ◽  
Vibrational Spectroscopy ◽  
Powder Diffraction ◽  
Infrared Spectra ◽  
Solid State Reaction ◽  
Structure Refinement ◽  
Unit Cell ◽  
Cell Group ◽  
X Ray

The present paper is interested in the study of compounds from the apatite family with the general formula Ca10 (PO4)6A2. It particularly brings to light the exploitation of the distinctive stereochemistries of two Ca positions in apatite. In fact, Gd-Bearing oxyapatiteCa8 Gd2 (PO4)6O2 has been synthesized by solid state reaction and characterized by X-ray powder diffraction. The site occupancies of substituents is0.3333 in Gd and 0.3333 for Ca in the Ca(1) position and 0. 5 for Gd in the Ca (2) position.  Besides, the observed frequencies in the Raman and infrared spectra were explained and discussed on the basis of unit-cell group analyses.

Fabrication and study the effect of the laser on the properties of the compound Tl2-xHgxBa2-ySryCa2Cu3O10+δ superconductor

2018 ◽  
pp. 168
Author(s):  
A. Kareem Dahash Ali ◽  
Nihad Ali Shafeek
Keyword(s):  
Transition Temperature ◽  
Solid State ◽  
Hydrostatic Pressure ◽  
Electrical Properties ◽  
Co2 Laser ◽  
Temperature Shift ◽  
Unit Cell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural And Electrical Properties

This study included the fabrication of    compound (Tl2-xHgxBa2-ySryCa2Cu3O10+δ) in a manner solid state and under hydrostatic pressure ( 8 ton/cm2) and temperature annealing(850°C), and determine the effect of the laser on the structural and electrical properties elements in the compound, and various concentrations of x where (x= 0.1,0.2,0.3 ). Observed by testing the XRD The best ratio of compensation for x is 0.2 as the value of a = b = 5.3899 (A °), c = 36.21 (A °) show that the installation of four-wheel-based type and that the best temperature shift is TC= 142 K  .When you shine a CO2 laser on the models in order to recognize the effect of the laser on these models showed the study of X-ray diffraction of these samples when preparing models with different concentrations of the values ​​of x, the best ratio of compensation is 0.2 which showed an increase in the values ​​of the dimensions of the unit cell a=b = 5.3929 (A °), c = 36.238 (A°). And the best transition temperature after shedding laser is TC=144 K. 

scholarly journals A Mixed-metal Mixed-halide Complex Prepared from Zerovalent Copper and Lead Salts: Solution and Solid-state Chemistry

1999 ◽  
Vol 23 (11) ◽  
pp. 670-671
Author(s):  
Larisa A. Kovbasyuk ◽  
Olga Yu. Vassilyeva ◽  
Vladimir N. Kokozay ◽  
Wolfgang Linert ◽  
Paul R. Raithby
Keyword(s):  
Solid State ◽  
Direct Interaction ◽  
Solid State Chemistry ◽  
X Ray ◽  
Mixed Metal ◽  
X Ray Crystallography ◽  
Halide Complex ◽  
Layer Arrangement ◽  
Lead Salts

The mixed-metal mixed-halide complex [CuPbBrlL2]2 has been prepared by the direct interaction of zerovalent copper with lead halides and 2-dimethylaminoethanol (HL) in dmso and has been characterized by X-ray crystallography; the structure shows a layer arrangement of the tetranuclear metal units through the μ3-halogen bridging.

The solution and solid state chemistry of dichlorobis(quinoline)cobalt(II)

1989 ◽  
Vol 14 (2) ◽  
pp. 100-104 ◽  
Author(s):  
Linda A. Jacobs ◽  
Cornelius P. J. van Vuuren
Keyword(s):  
Solid State ◽  
Solid State Chemistry
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