Results 251 to 260 of about 562,965 (299)

Orientation of Hexagonal Crystals

American Journal of Physics, 1970
Interplanar angles and stereographic projections are described for hexagonal structures. Graphs of the variations of some interplanar angles with c/a are given. The four systems of indexing hexagonal lattices are compared.
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Orientation of Apatite Crystals in Bone

Nature, 1954
FROM the earliest experiments on X-ray diffraction by specimens of bone, it has been well known that in long bones, for example, femora, the c-axes of the hexagonal apatite crystals are preferentially orientated parallel to the long axis of the bone.
S M, CLARK, J, IBALL
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Orientational relaxation and orientational structure of C60 crystal

International Journal of Inorganic Materials, 2001
Abstract The site occupancies of orientational angle 98° and 38° of C 60 molecules versus temperature is investigated by an extremal dynamic model in the temperature range between order–disorder phase transition and glassy transition. The site occupancy of orientational angle 38° calculated by the model are 0.1699, 0.1828 and 0.3732, which are ...
W.Q Cao, Y.F Cheng, J.D Liu
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Woodpile photonic crystal of various crystal orientations

SPIE Proceedings, 2011
Three-dimensional woodpile photonic crystals with a variety of crystal orientations and surfaces, including (110), (001), (100) and (010) planes, are fabricated in GaAs and silicon with the multi-directional etching method. The optical properties of the fabricated woodpile photonic crystals are characterized via reflectance spectra measurement. High
Lingling Tang, Shu-Yu Su, Tomoyuki Yoshie   +2 more
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Theoretical analysis of oriented and non-isothermal crystallization III. Kinetics of crystal orientation

Colloid and Polymer Science, 1978
A general orientation equation for rigid particles embedded in a continuum has been derived. The equation includes hydrodynamic, thermodynamic, diffusional and kinetic terms, corresponding to physically different orientation mechanisms. Some special solutions of the general equation are presented, and discussed conditions under which the general ...
Andrzej Ziabicki, Leszek Jarecki
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Orientation-translation and orientation-orientation correlations in neopentane plastic crystals. Computer simulation

Molecular Physics, 1996
The dynamics of orientationally disordered crystals, such as neopentane C(CH3)4, couple translational and orientational variables in a complex way. From the results of a molecular dynamics simulation of the orientationally disordered phase of neopentane, simple geometrical methods are used to define functions that can be displayed on a two-dimensional ...
Ph. Depondt, W. Breymann
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Oriented Halide Perovskite Crystals

Chemical Reviews, 2021
Yuan, Chen, Lakshminarayana, Polavarapu, Haibo, Zeng   +2 more
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Orientation crystallization of polymers

Fibre Chemistry, 1978
The important point made in the last section was the discovery in the systems of structures of the usual folded kind and of morphological elements which consist of orientation-crystallized and probably straightened macromolecules the presence of which can be predicted from the results of a thermodynamic analysis.
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A crystal orienting device

Journal of Scientific Instruments, 1965
A device which facilitates alignment of single crystals is described. It consists of a small rotatable pedestal mounted atop the normal single crystal goniometer head.
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Successive Orientational Transitions in Crystals

The Journal of Chemical Physics, 1954
An extended discussion is given of a crystal model showing successive ``rotational'' or orientational transitions. This model consists of an array of classical rotators with next-neighbor coupling, the potential energy of coupling being E(θij)=AP1(cosθij)+BP2(cosθij), where θij is the angle between the molecular axes of symmetry.
Theodore J. Krieger, Hubert M. James
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