scholarly journals Light Figures of Single Crystals of Tetragonal Tin and the Determination of Their Crystal Orientations by the Light-Figure Method, Part III. Orientation Determination by the Light-Figure Method

1953 ◽  
Vol 17 (3) ◽  
pp. 113-118
Author(s):  
Mikio Yamamoto ◽  
Jirô Watanabé
Keyword(s):  
Single Crystals ◽  
Crystal Orientations ◽  
Orientation Determination

OrientXplot: a program to analyse and display relative crystal orientations

2015 ◽  
Vol 48 (4) ◽  
pp. 1330-1334 ◽  
Author(s):  
Ross Angel ◽  
Sula Milani ◽  
Matteo Alvaro ◽  
Fabrizio Nestola
Keyword(s):  
Single Crystals ◽  
Diffraction Pattern ◽  
Euler Angles ◽  
Electron Backscattered Diffraction ◽  
Orientation Data ◽  
User Control ◽  
Crystal Orientations ◽  
Orientation Matrix ◽  
Crystallographic Axes

Orientations of single crystals are usually determined by diffraction experiments. Indexing of a diffraction pattern from one crystal leads to the determination of its `orientation matrix', which defines the orientation of its crystallographic axes relative to a set of reference axes associated with the diffractometer. Crystal orientations can also be described in terms of Euler angles, especially from electron backscattered diffraction measurements.OrientXplotis a Windows program that reads all common types of orientation matrices, as well as orientation data such as Euler angles. The program calculates and displays the relative orientations of pairs of crystals, such as twins or inclusion crystals trapped inside host crystals.OrientXplotcan manipulate (under user control) the orientation matrices to allow for ambiguities in indexing that arise from crystal symmetries. Orientation data can be displayed on a stereogram or output in numerical form for plotting in external programs.

Ultrasonic Orientation Determination of Single Crystals

1967 ◽  
Vol 41 (1) ◽  
pp. 84-90 ◽  
Author(s):  
Robert E. Green ◽  
Edmund G. Henneke
Keyword(s):  
Single Crystals ◽  
Orientation Determination

Sign and Orientation Determination of the Principal Axis of the Electric Field Gradient in Fe57 Enriched Deoxygenated Myoglobin Single Crystals

1974 ◽  
Vol 29 (3-4) ◽  
pp. 241-244 ◽  
Author(s):  
Ulrich Gonser ◽  
Yutaka Maeda ◽  
Alfred Trautwein ◽  
Fritz Parak ◽  
Helmut Formanek
Keyword(s):  
Electric Field ◽  
Electric Field Gradient ◽  
Single Crystals ◽  
Field Gradient ◽  
Principal Axis ◽  
Quadrupole Split ◽  
Mössbauer Measurements ◽  
Orientation Determination ◽  
Two Alternatives

Single crystals of myoglobin enriched on Fe57 with a diameter of about 0.5 mm were prepared. After deoxygenation crystallographic alignment and Mössbauer measurements were carried out at 77°K. In the experiment eight different orientations were selected by rotating the crystal around the b axis, thus, b axis and γ-ray propagation direction remained perpendicular to each other. From the intensity ratio of the quadrupole split spectra we derive the sign and the orientation of the principal axis of the electric field gradient. We find Vzz to be positive and forming an angle of 40° to the b axis. From two alternatives consistent with our experiments we conclude that VZZ is most likely oriented along one of the four Fe-N directions in the heme.

Electron Microscopy for the determination of preferred crystal orientations: A concise review

1990 ◽  
Vol 48 (4) ◽  
pp. 434-435
Author(s):  
Robert A. Schwarzer ◽  
Hasso Weiland
Keyword(s):  
Electron Microscopy ◽  
High Energy ◽  
List Type ◽  
Crystal Texture ◽  
Concise Review ◽  
Crystal Orientations ◽  
High Energy Electrons ◽  
Grain Orientations ◽  
Orientation Determination

The distribution of grain orientations (“crystal texture”, “preferred orientations”) is a distinctive feature of microstructure, since important material properties are anisotropic, and changes of crystal texture may be found in workpieces which are typical for fabrication processes and use. Two complementary computerized techniques /1/ are available for the study of preferred crystal orientations on a microscale using electron microscopy:the measurement of individual grain orientations (TEM, SEM)polefigure measurements (TEM).The standard methods of orientation determination grain by grain using a TEM are the interpretation of SAD spot and of microbeam diffraction Kikuchi patterns. Thin samples, however, are required which are transparent for high-energy electrons.

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