scholarly journals Use of Imaging Plates in X-Ray Analysis

1997 ◽  
Vol 29 (1-2) ◽  
pp. 89-101 ◽  
Author(s):  
M. Ermrich ◽  
F. Hahn ◽  
E. R. Wölfel
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Powder Diffraction ◽  
Polycrystalline Materials ◽  
Imaging Plate ◽  
Two Dimensional ◽  
X Ray ◽  
Working Principle ◽  
Imaging Plates

Two-dimensional detectors have opened a new area for the investigation of both single crystals and polycrystalline materials. The working principle of Imaging Plates is described. Some characteristics and the advantages of an Imaging Plate are discussed using the STOE Imaging Plate Diffraction System for different kinds of X-ray analysis: (i) single crystal diffractometry, (ii) powder diffraction and (iii) stress and texture investigations.

Crystal Structure of Eu2PdSi3

2003 ◽  
Vol 58 (10) ◽  
pp. 971-974 ◽  
Author(s):  
U. Ch. Rodewald ◽  
R.-D. Hoffmann ◽  
R. Pöttgen ◽  
E.V. Sampathkumaran
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Two Dimensional ◽  
Silica Tube ◽  
Variable Parameters ◽  
X Ray

Single crystals of Eu2PdSi3 were obtained from an arc-melted sample that was further annealed at 1020 K for seven days in a silica tube. The structure of Eu2PdSi3 was refined from single crystal X-ray diffractometer data: P6/mmm, a = 831.88(12), c = 435.88(9) pm, wR2 = 0.1175, 265 F2 values, and 13 variable parameters. It crystallizes with the U2RuSi3 structure, a superstructure of the AlB2 type. The palladium and silicon atoms form a planar two-dimensional [PdSi3] network. The two crystallographically different europium atoms have hexagonal prismatic coordinations Eu1Si12 and Eu2Pd4Si8. The Pd-Si and Si-Si distances within the [PdSi3] network are 244 and 236 pm, respectively.

Powder X-ray diffraction data for Ba4ZnTi11O27 and Ba2ZnTi5O13

1994 ◽  
Vol 9 (1) ◽  
pp. 56-62 ◽  
Author(s):  
C. G. Lindsay ◽  
C. J. Rawn ◽  
R. S. Roth
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Dimensions ◽  
Powder Samples ◽  
Unit Cell Dimensions

Single crystals and powder samples of Ba4ZnTi11O27 and Ba2ZnTi5O13 have been synthesized and studied using single-crystal X-ray precession photographs and X-ray powder diffraction. Unit cell dimensions were calculated from a least-squares refinement with a final maximum Δ2θ of 0.05°. Both phases were found to have monoclinic cells, space group C2/m. The refined lattice parameters for the Ba4ZnTi11O27 compound are a= 19.8687(8) Å, b=11.4674(5) Å, c=9.9184(4) Å, β= 109.223(4)°, and Z=4. The refined lattice parameters for the Ba2ZnTi5O13 compound are a= 15.2822(7) Å, b=3.8977(1) Å, c=9.1398(3) Å, β=98.769(4)°, and Z=2.

Ionic Conductivity of Li2ZnTi3O8 Single Crystal

2011 ◽  
Vol 497 ◽  
pp. 26-30 ◽  
Author(s):  
Shinichi Furusawa ◽  
Hiroshi Ochiai ◽  
Khoji Murayama
Keyword(s):  
Ionic Conductivity ◽  
Single Crystal ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Powder Diffraction ◽  
Floating Zone ◽  
Zinc Titanate ◽  
X Ray ◽  
Temperature Range ◽  
First Time

Single crystals of lithium zinc titanate (Li2ZnTi3O8) were grown in a double-mirror type optical floating-zone furnace for the first time. Single crystals were characterized by X-ray powder diffraction and Laue measurements. The ionic conductivity of the single crystals was measured in the temperature range of 400–700 K. Below 600 K, the ionic conductivity of the single crystal is one to two orders of magnitude higher than that of polycrystalline Li2ZnTi3O8. In the temperature range of 550–600 K, the temperature dependence of the ionic conductivity shows non-Arrhenius behaviour.

scholarly journals The growth of Mg2TiO4 single crystals using a four-mirror furnace

2011 ◽  
Vol 76 (11) ◽  
pp. 1561-1566 ◽  
Author(s):  
Aleksandar Golubovic ◽  
Marko Radovic
Keyword(s):  
Optical Properties ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Single Crystals ◽  
Powder Diffraction ◽  
Spectroscopic Ellipsometry ◽  
Lattice Parameter ◽  
Published Data ◽  
X Ray ◽  
Float Zone

A single crystal of Mg2TiO4 was grown by the travelling solvent float zone (TSFZ) method. The lattice parameter a = 0.8444(8) nm was determined by X-ray powder diffraction analysis. The optical properties of the Mg2TiO4 single crystals were studied using spectroscopic ellipsometry. The obtained results are discussed and compared with published data.

Time-resolved two-dimensional observation of the change in X-ray diffuse scattering from an alloy single crystal using an imaging plate on a synchrotron-radiation source

1990 ◽  
Vol 23 (6) ◽  
pp. 509-514 ◽  
Author(s):  
H. Iwasaki ◽  
Y. Matsuo ◽  
K. Ohshima ◽  
S. Hashimoto
Keyword(s):  
Synchrotron Radiation ◽  
Single Crystal ◽  
Diffuse Scattering ◽  
Structural Changes ◽  
Time Interval ◽  
Imaging Plate ◽  
Two Dimensional ◽  
Diffuse Intensity ◽  
Time Resolved ◽  
X Ray

Through the high sensitivity of an area-detector Imaging Plate and the high brilliance of synchrotron radiation, changes in two-dimensional intensity distribution of X-ray diffuse scattering from an AgZn single-crystal having the B2-type structure were observed successively during the structural transition from the β′ phase to the ζ phase. It has been shown in a series of patterns taken at a time interval of 600 s that a diffuse intensity sheet extending parallel to the (111) relplane gradually loses its intensity without a precursive modulation while weak diffraction spots from the nuclei of the ζ phase appear superimposed on the sheet with a definite positional relation to the diffraction spots from the β′ phase. Promising aspects as well as the limits of the method applied to time-resolved measurements of structural changes are discussed.

Structure Refinements Of REAuSn (Re = Sm, Gd, Tm)

2006 ◽  
Vol 61 (8) ◽  
pp. 1045-1047 ◽  
Author(s):  
C. P. Sebastian ◽  
Rainer Pöttgen
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Crystal Chemistry ◽  
Two Dimensional ◽  
Crystal Data ◽  
X Ray ◽  
Octahedral Sites

Well-shaped single crystals of the stannides REAuSn (RE = Sm, Gd, Tm) were obtained from arc-melted ingots. The samples were investigated on the basis of X-ray powder and single crystal data: NdPtSb type, P63mc, Z = 2, a = 467.3(1), c = 748.9(2) pm, wR2 = 0.0468, BASF = 0.273(14), 273 F2 values, 12 variables for SmAuSn, a = 465.14(9), c = 742.4(1) pm, wR2 = 0.0686, 265 F2 values, 11 variables for GdAuSn, and MgAgAs type, F4̅3m, Z = 4, a = 658.54(9) pm, wR2 = 0.0384, 120 F2 values, 5 variables for TmAuSn. The [AuSn] networks in SmAuSn and GdAuSn are two-dimensional with intralayer Au-Sn distances of 278 and 277 pm in the slightly puckered Au3Sn3 hexagons, respectively. The interlayer Au-Sn distances of 308 and 302 pm are much longer. TmAuSn has a network of corner-sharing AuSn4/4 tetrahedra with Au-Sn distances of 285 pm. The thulium atoms fill octahedral sites formed by the tin atoms. The crystal chemistry of these REAuSn stannides is briefly discussed

Refinement of hexamethylenetetramine based on diffractometer and imaging-plate data

1994 ◽  
Vol 27 (5) ◽  
pp. 722-726 ◽  
Author(s):  
J. Grochowski ◽  
P. Serda ◽  
K. S. Wilson ◽  
Z. Dauter
Keyword(s):  
Data Structure ◽  
Single Crystals ◽  
Imaging Plate ◽  
Data Sets ◽  
Two Dimensional ◽  
High Quality ◽  
Data Set ◽  
X Ray ◽  
Rotation Method ◽  
Comparable Accuracy

Two data sets were collected on single crystals of hexamethylenetetramine (urotropin) using a four-circle diffractometer with Cu Kα radiation and an imaging-plate two-dimensional detector with Mo Kα source using the rotation method. Both data sets extend to the same limit of sin θ/λ = 0.62 Å−1, corresponding to a resolution of 0.81 Å. Different processing protocols were employed for the two sets of data. Structure refinements carried out separately with each data set led to equivalent results of comparable accuracy. The imaging-plate scanner was able to provide X-ray data of high quality in a significantly shorter time than the diffractometer.

A versatile X-ray diffraction station at LNLS (Brazil)

1998 ◽  
Vol 5 (3) ◽  
pp. 491-493 ◽  
Author(s):  
Cesar Cusatis ◽  
Margareth Kobayashi Franco ◽  
Edson Kakuno ◽  
Carlos Giles ◽  
Sergio Morelhão ◽  
...  
Keyword(s):  
Single Crystal ◽  
Powder Diffraction ◽  
High Energy ◽  
High Energy Resolution ◽  
High Angular Resolution ◽  
X Ray Diffraction ◽  
Double Crystal ◽  
X Ray ◽  
And Control ◽  
Imaging Plates

Versatility was a major consideration in the project to provide an X-ray diffraction station at LNLS. At least two techniques are possible at the station: powder diffraction and multiple single-crystal diffraction. A two-crystal monochromator based on monolithic elastic translators, developed at LNLS, with sagittal focusing by the second crystal, allows 10 mrad of a ≥2 keV monochromatic beam to be used on the diffractometer. The station is equipped with a fast scintillation detector, imaging plates, a high-energy-resolution pin-diode detector, an ionization chamber and a high-angular-resolution soller slit. The data collection and control hardware and software were also developed at LNLS. The θ–2θ goniometry for powder diffraction on this 1 m-diameter diffractometer is based on commercial rotation tables. The multiple single-crystal goniometry is realized by an independent elastic axis driven by differential micrometers for both high- and low-resolution angular movements. At least four independent axes can be positioned as necessary on the diffractometer table. Powder diffractograms and double-crystal rocking curves collected with the synchrotron beam show the expected quality.

Powder Diffraction Data of Three Tetrahydropyridinyl Oxime Cognition Activators of Formula C8H15N2O+Cl−

1992 ◽  
Vol 7 (3) ◽  
pp. 170-173 ◽  
Author(s):  
G. Bandoli ◽  
M. Nicolini ◽  
A. Ongaro
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Single Crystal Structure ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Data Comparison ◽  
Structure Determinations

AbstractIndexed X-ray powder diffraction data are reported for three tetrahydropyridinyl oxime cognition activators. For these drugs of formula C8H15N2O+Cl− powder diffraction data calculated from single crystal structure determinations are also presented and compared to the experimentally observed powder diffraction data. Comparison of experimental and calculated powder patterns assures that single crystals are good representatives of the commercial powdered samples.

Crystal structure of the europium(II) aluminate Eu3Al2O6

2015 ◽  
Vol 70 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Oliver Niehaus ◽  
Rainer Pöttgen
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Bond Valence ◽  
Side Product ◽  
Two Dimensional ◽  
X Ray ◽  
Coordination Numbers ◽  
Oxygen Coordination ◽  
The Eu

AbstractWell-shaped single crystals of the europium(II) aluminate Eu3Al2O6 were obtained as a side product during a synthesis attempt for EuCdAl. The structure was refined from single crystal X-ray diffractometer data of a twinned specimen: Ca3Al2O6 type, $Pa\bar 3,$a=1584.82(2) pm, wR=0.0570, 2034 F2 values, and 103 variables. All aluminium atoms in the Eu3Al2O6 structure show tetrahedral oxygen coordination, and the AlO4 tetrahedra (173–178 pm Al–O) are condensed via common corners to two-dimensional networks. The six crystallographically independent europium sites have coordination numbers 6, 7, 8, and 9, and their europium–oxygen polyhedra are linked with the AlO4 tetrahedra to a dense packing. Bond-valence calculations reveal two sets of differently bonded europium atoms.

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