Showing papers on "Electron backscatter diffraction published in 1971"
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TL;DR: Lipson and Steeple as mentioned in this paper interpreted X-ray powder diffraction patterns and found that powder-diffraction patterns can be represented by a set of 3-dimensional planes.
Abstract: Interpretation of X-ray Powder Diffraction Patterns . By H. Lipson and H. Steeple. Pp. viii + 335 + 3 plates. (Mac-millan: London; St Martins Press: New York, May 1970.) £4.
1,867 citations
TL;DR: The problems in the analysis of surface structures by means of electron diffraction, particularly at low energy, are reviewed in this paper, where the basic scattering and diffraction phenomena occurring at a solid surface is described.
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TL;DR: This work uses the techniques of optical diffraction and optical filtering to study electron micrographs of myofibrils and of paracrystals of my ofibrillar proteins, and compares the optical Diffraction patterns with the X-ray diffraction patterns obtained from living muscle.
Abstract: We have used the techniques of optical diffraction and optical filtering to study electron micrographs of myofibrils and of paracrystals of myofibrillar proteins. The optical diffraction patterns provide information about periodic structure in the micrographs, and sometimes may reveal periodicities not apparent to the eye. We compare the optical diffraction patterns with the X-ray diffraction patterns obtained from living muscle, and this comparison can assist our interpretation of both the X-ray diffraction patterns and the electron micrographs. The optical diffractometer we have used is essentially similar to those described by Taylor & Lipson (1964), and by Klug & DeRosier (1966). The apparatus incorporates several refinements to facilitate operation. The recombining lens has a focal length, f , of about 1 m, and is placed so that the recombined image is formed at 2 f and has the same size as the subject. The diffraction subjects are not usually the electron micrographs themselves but copies on film. The film is of more uniform optical thickness than the glass electron micrograph, and is less fragile. Moreover, a set of films of varying contrast can be made from one micrograph.
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TL;DR: The molecular structures of (Cl3Si)2O and F3SiOCH3 have been determined in the vapour phase by the sector microphotometer method of electron diffraction as discussed by the authors.
TL;DR: The most commonly used method was that of reflection high-energy electron diffraction (RREED), which has proved extremely powerful as mentioned in this paper, however, it requires an atomically smooth surface if the diffraction pattern is not to contain confusing features which result from surface asperities and undulations.
Abstract: Many investigations in metallurgy and physics require a knowledge of the chemical and physical state of the surface of a solid. For example, junction effects at semiconductor interfaces depend sensitively upon the surface states, which, in turn, depend upon the surface symmetry and chemistry; rigorous studies of epitaxial overgrowth must necessarily be performed on surfaces with known atomic arrangements. The techniques previously available for such studies have all had serious attendant disadvantages. The most commonly used method was that of reflection high-energy electron diffraction (RREED), which has proved extremely powerful. However, it requires an atomically smooth surface if the diffraction pattern is not to contain confusing features which result from surface asperities and undulations. Another powerful structural method is field-ion microscopy (FIM), but this has among its disadvantages the fact that it can cause progressive removal of the surface being studied. X-ray-fluorescence analy...
TL;DR: In this paper, X-ray diffraction measurements of NiFe2-xMnxO4 with x=0.02 and 0.05 were obtained by a conventional ceramic technique.
Abstract: Polycrystalline ferrites of compositions NiFe2-xMnxO4 with x=0.02 and 0.05 were obtained by a conventional ceramic technique. Neutron diffraction measurements of the oxygen parameter u and X-ray diffraction measurements of the cell dimension a of the samples are presented. The u parameter of either sample is not particularly sensitive to the degree of inversion y. Doping of x=0.02 preserves the unit cell of NiFe2O4 unaffected while x=0.05 significantly enlarges the A sites of the ferrite.
TL;DR: In this article, the results of susceptibility measurements and of neutron diffraction on CsNiF 3 are reported, showing that a one-dimensional ferromagnetic order of magnetic moments along the c-axis is expected both from crystal structure and susceptibility determinations.
TL;DR: In this article, a Fortran Thermal Ellipsoid Plot Program for Crystal Structure Illustrations (FTEP) is presented, which is based on the idea of using a thermal ellipse.
Abstract: DUNNING, A. J. & VAND, V. (1969). Acta Cryst. 15, I092. GROVE, D. C. • KEENAN, G. L. (1941). J. Amer. Chem. Soc. 63, 97. HIGUCHI, W. I., BERNADO, P. D. & MEHTA, S. C. (1967). J. Pharm. Sci. 56, 200. JOHNSON, C. K. (1965). ORTEP, A Fortran Thermal Ellipsoid Plot Program for Crystal Structure Illustrations. ORNL-3794, Oak Ridge National Laboratory, Tennessee. KLUG, H. P. (1968). Acta Cryst. B24, 792. LAI, T. F. & MARSH, R. E. (1967). Acta Cryst. 22, 885. MESLEY, R. J. & HOUGHTON, E. E. (1967). J. Pharm. Pharmacol. 19, 295. MIYAZAKI, H. (1947). Japan J. Pharm. Chem. 19, 133. See also (1951). Chem. Abstr. 45, 3559h. O'CONNELL, A. M. & MASLEN, E. N. (1967). Acta Cryst. 22, 134. SEYDEL, J. K. (1968). J. Pharm. Sci. 57, 1455. SHEINKER, Yu. N., POSTOVSKII, ]. YA., VORONINA, N. M. & KUSHKIN, V. V. (1957). Zh. Fiz. Khim. 31, 1745. SMITH, D. L. (1969). Acta Cryst. B25, 625. SUTTON, L. E. (1965). Tables of lnteratomic Distances and Configuration of Molecules and Ions. Supplement, 19561959. London: The Chemical Society. TRUEBLOOD, K. N., GOLDISH. E. & DONOHUE, J. (1961). Acta Cryst. 14, 1009.
TL;DR: In this paper, a structural inhomogeneity in Fe-Ni invar alloys is revealed, which can be identified as finely dispersed ordered Fe3Ni precipitates, which are then identified as fine-grained ordered precipitates.
TL;DR: In this article, the molecular structure of F3SiNCO has been determined in the vapour phase by the sector microphotometer method of electron diffraction, consistent with an Si-N-C angle of 160.7±1.2°, and Si-F and SiN bond lengths of 1.553±0.004 and 1.648± 0.010 A respectively.
TL;DR: In this article, the combined techniques of selected-area electron diffraction and dark-field electron microscopy have been used to determine the ordered distribution of carbon atoms formed after low-temperature annealing in crystals with composition near Ti2C.
Abstract: The combined techniques of selected-area electron diffraction and dark-field electron microscopy have been used to determine the ordered distribution of carbon atoms formed after low-temperature annealing in crystals with composition near Ti2C. The superstructure is based on a cubic lattice similar to that previously determined by neutron diffraction and is consistent with the antiphase boundary contrast observed in dark-field images.
TL;DR: With monochromatic thermal neutrons, 111 diffraction topographs of germanium crystals with thickness of about 1 cm were taken, before and after hot-pressing as discussed by the authors.
Abstract: With monochromatic thermal neutrons, 111 diffraction topographs of germanium crystals with thickness of about 1 cm were taken, before and after hot-pressing. Changes of diffraction contrasts were observed.
TL;DR: In this article, the best agreement between experimental and calculated electron diffraction data was obtained for (WO 3 ) 3 species with a six-membered ring structure, although the presence of other polymeric species could not be ruled out.
TL;DR: In this article, the nature of exchange reflexions in low energy electron diffraction from antiferromagnetic nickel oxide was studied in particular reference to its dependence on the diffraction condition of electrons, which was, in the present study, changed primarily by rotating the crystal at a fixed electron energy.
Abstract: The nature of exchange reflexions in low-energy electron diffraction from antiferromagnetic nickel oxide was studied in particular reference to its dependence on the diffraction condition of electrons, which was, in the present study, changed primarily by rotating the crystal at a fixed electron energy. It was pointed out that the exchange reflexions are subject to the three-dimensional diffraction conditions appropriate to the reciprocal lattice points which correspond to the magnetic structure, and also that the intensities of these weak reflexions may be favourably enhanced by the dynamical diffraction effect under the condition which involves the simultaneous presence of a strong regular reflexion.
TL;DR: In this paper, a combination of electron diffraction measurements and rotational constants measured by microwave spectroscopy was used to deduce the geometrical data for IF5 and BrF5.
Abstract: Geometrical data for IF5 and BrF5 have been deduced from a combination of electron diffraction measurements and rotational constants measured by microwave spectroscopy.
TL;DR: Several layered, transition metal dichalcogenide intercalation complexes with unique superconducting properties have been examined by high-resolution electron microscopy and electron diffraction and they confirm and extend the postulated models.
Abstract: Several layered, transition metal dichalcogenide intercalation complexes with unique superconducting properties have been examined by high-resolution electron microscopy and electron diffraction. Details of the crystalline lattice and of the lattice imperfections have been directly resolved. The results can be correlated with the available x-ray diffraction and chemical data, and they confirm and extend the postulated models.
TL;DR: In this paper, the time modulation of neutrons diffracted by a quartz single crystal is investigated and the experimental results agree with the aberration and with the Doppler effect caused during neutron diffraction by vibrations of a single crystal.
Abstract: The time modulation of neutrons diffracted by a quartz single crystal is investigated. The experimental results agree with the aberration and with the Doppler effect caused during neutron diffraction by vibrations of a single crystal.