Automatic measurement of SAED patterns from asbestos minerals

1988 ◽  
Vol 46 ◽  
pp. 846-847
Author(s):  
J. C. Russ ◽  
T. Taguchi ◽  
P. M. Peters ◽  
E. Chatfield ◽  
J. C. Russ ◽  
...  
Keyword(s):  
Diffraction Pattern ◽  
High Precision ◽  
Diffraction Data ◽  
Automatic Measurement ◽  
Automatic Method ◽  
Important Method ◽  
X Ray ◽  
Integrated Intensity ◽  
Asbestiform Minerals ◽  
True Center

Conventional SAD patterns as obtained in the TEM present difficulties for identification of materials such as asbestiform minerals, although diffraction data is considered to be an important method for making this purpose. The preferred orientation of the fibers and the spotty patterns that are obtained do not readily lend themselves to measurement of the integrated intensity values for each d-spacing, and even the d-spacings may be hard to determine precisely because the true center location for the broken rings requires estimation. We have implemented an automatic method for diffraction pattern measurement to overcome these problems. It automatically locates the center of patterns with high precision, measures the radius of each ring of spots in the pattern, and integrates the density of spots in that ring. The resulting spectrum of intensity vs. radius is then used just as a conventional X-ray diffractometer scan would be, to locate peaks and produce a list of d,I values suitable for search/match comparison to known or expected phases.

Automatic Computer Measurement of Selected Area Electron Diffraction Patterns from Asbestos Minerals

1988 ◽  
Vol 32 ◽  
pp. 593-600
Author(s):  
J. C. Russ ◽  
T. Taguchi ◽  
P. M. Peters ◽  
E. Chatfield ◽  
J. C. Russ ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Diffraction Pattern ◽  
Diffraction Data ◽  
Automatic Method ◽  
Automatic Computer ◽  
Selected Area Electron Diffraction ◽  
Computer Measurement ◽  
Integrated Intensity ◽  
Diffraction Patterns ◽  
True Center

Conventional selected area diffraction patterns as obtained in the TEM present difficulties for identification of materials such as asbestifonn minerals, although diffraction data is considered to be one of the preferred methods for making this identification. The preferred orientation of the fibers in each field of measurement, and the spotty patterns that are obtained, do not readily lend themselves to measurement of the integrated intensity values for each dspacing, and even the d-spacings may be hard to determine precisely because the true center location for the broken rings requires estimation. To overcome these problems, we have implemented an automatic method for diffraction pattern measurement. It automatically locates the center of patterns with high precision, measures the radius of each ring of spots in the pattern, and integrates the density of spots in that ring.

X-ray powder diffraction data for indium nitride

1999 ◽  
Vol 14 (4) ◽  
pp. 258-260 ◽  
Author(s):  
W. Paszkowicz
Keyword(s):  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Microwave Plasma ◽  
Indium Nitride ◽  
Plasma Source ◽  
Unit Cell ◽  
Powder Diffraction Data ◽  
Calculated Density ◽  
X Ray

X-ray powder diffraction pattern for InN synthesized using a microwave plasma source of nitrogen is reported. The data were obtained with the help of an automated Bragg-Brentano diffractometer using Ni-filtered CuKα radiation. The lattice parameters for the wurtzite-type unit cell are ao=3.5378(1) Å, co=5.7033(1) Å. The calculated density is 6.921±0.002 g/cm3.

X-ray powder diffraction data for the superconducting phase Tl0.5Pb0.5Sr2CaCu2O6.5+δ

1993 ◽  
Vol 8 (4) ◽  
pp. 249-250 ◽  
Author(s):  
Chan Park ◽  
Robert L. Snyder
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Superconducting Phase ◽  
Powder Diffraction Data ◽  
X Ray ◽  
High Temperature Superconducting

The X-ray powder diffraction pattern for a sample of the high-temperature superconducting phase Tl0.5Pb0.5Sr2CaCu2O6.5+δ has been determined. The sample was prepared by a molten salt technique and had a Tc of 96 K.

X-Ray Powder Diffraction Data for Wolfeite: (Fe0.59Mn0.40Mg0.01)2PO4(OH)

1989 ◽  
Vol 4 (1) ◽  
pp. 34-35 ◽  
Author(s):  
Diano Antenucci ◽  
Francois Fontan ◽  
Andre-Mathieu Fransolet
Keyword(s):  
Federal Republic ◽  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Unit Cell ◽  
Federal Republic Of Germany ◽  
Powder Diffraction Data ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters

AbstractWolfeite (Fe0.59Mn0.40Mg0.01)2PO4(OH) from the Hagendorf-Sud pegmatite, Bavaria, Federal Republic of Germany, yields unit-cell parameters of: a = 12.319(1), b = 13.280(2), c = 9.840(1) Å and β = 108° 24(1). Dmeas. = 3.82(2); Dcalc. = 3.88. An indexed powder diffraction pattern is given.

ChemInform Abstract: High-Precision X-Ray Diffraction Data, Experimental and Theoretical Study of 2H-MoS2.

ChemInform ◽  
2014 ◽  
Vol 45 (35) ◽  
pp. no-no
Author(s):  
N. G. Naumov ◽  
A. A. Korlyukov ◽  
D. A. Piryazev ◽  
A. V. Virovets ◽  
V. E. Fedorov
Keyword(s):  
High Precision ◽  
Diffraction Data ◽  
Theoretical Study ◽  
X Ray Diffraction ◽  
X Ray

X-ray powder diffraction studies of fibrillar zinc trimolybdates ZnMo3O10·nH2O (n=3.75,5,10)

1999 ◽  
Vol 14 (4) ◽  
pp. 276-279
Author(s):  
Wiesław Łasocha ◽  
Wiesław Surga ◽  
Alicja Rafalska-Łasocha
Keyword(s):  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Lattice Parameters ◽  
Fiber Axis ◽  
Powder Diffraction Data ◽  
Parallel Fibers ◽  
X Ray ◽  
Space Groups ◽  
Diffraction Patterns

The X-ray powder diffraction data of polycrystalline fibrillar zinc trimolybdates ZnMo3O10·3.75H2O, ZnMo3O10·5H2O, and ZnMo3O10·10H2O, are reported. An uncommon diffraction pattern was recorded in the case of the “wet fibers” of ZnMo3O10·10H2O, which could be indexed assuming a model of parallel fibers with translation disorder along the fiber axis. The powder diffraction patterns, lattice parameters, space groups, and other data describing these compounds are presented in this paper.© 1999 International Centre for Diffraction Data.

X-ray powder diffraction data for high-temperature Al4Re(Ni)

2009 ◽  
Vol 24 (1) ◽  
pp. 29-31 ◽  
Author(s):  
B. Grushko
Keyword(s):  
High Temperature ◽  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Monoclinic Phase ◽  
Binary Alloys ◽  
Powder Diffraction Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray

A monoclinic phase isostructural to Al4W was revealed in Al–Ni–Re close to the Al–Re terminal. It is assumed to be a ternary extension of the high-temperature Al4Re phase usually transforming in binary alloys even by sharp quenching from the existence temperatures. The powder X-ray diffraction pattern of this phase of the Al77Ni2.5Re20.5 composition was indexed for the Cm space group with a=5.1538(12) Å, b=17.410(5) Å, c=5.1546(15) Å, and β=100.548(16)°.

X-ray powder diffraction data for [Co(NH3)5Br]Br2

1996 ◽  
Vol 11 (4) ◽  
pp. 297-298
Author(s):  
Hongxiang Wu ◽  
Lidun Ma ◽  
Xiaoliang Shen ◽  
Guoshun Shi
Keyword(s):  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Title Compound ◽  
Powder Diffraction Data ◽  
Orthorhombic System ◽  
X Ray

The X-ray powder diffraction pattern for the title compound is reported in the range 10<2θ<60°. The sample was purified by recrystallization and was indexed using the program DICVOL91 and TREOR90. Refined unit parameters for the orthorhombic system (Pnma or Pn21a) are: a=13.7098(8) Å, b=10.7153(7) Å, c=6.9473(4) Å, V=1020.59 Å3, Z=4, Dx=2.50 g cm−3. M20=49, F30=93(0.0075, 43).

Synthesis and X-ray diffraction data of 1-N-(4-pyridylmethyl)amino naphthalene

2010 ◽  
Vol 25 (1) ◽  
pp. 72-74 ◽  
Author(s):  
H. A. Camargo ◽  
J. A. Henao ◽  
D. F. Amado ◽  
V. V. Kouznetsov
Keyword(s):  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Unit Cell ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
Monoclinic System ◽  
Space Group ◽  
X Ray ◽  
Cell Parameters

1-N-(4-pyridylmethyl)amino naphtalene was synthesized by means of a reaction of alpha-naphthylamine, 4-pyridylcarboxyaldehyde, in anhydrous ethanol to obtainN-(4-pyridylen)-alpha-naphthylamine and that was reduced with NaBH4 to produce the wanted compound. The X-ray powder diffraction pattern for the new compound 1-N-(4-pyrydylmethyl)amino naphtalene was obtained. This compound crystallizes in a monoclinic system with refined unit cell parameters a=10.375(5) Å, b=17.665(6) Å, c=5.566(2) Å, β=100.11(3), and V=1004.3(5) Å3, with space group P2/m (No. 10).

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