Three-dimensional periodicity and inversion axes in crystals
نویسندگان
چکیده
منابع مشابه
Curvature relations in three-dimensional symmetric axes
Aspects of symmetric axis geometry in three dimensions are discussed. A notion of radius curvature is defined and a relationship between symmetric axis curvature, radius curvature, and boundary curvature is derived.
متن کاملThree-Dimensional Photonic Crystals
Principle Investigators: Georg von Freymann and Martin Wegener CFN-Financed Scientists: C. Becker (3/4 BAT IIa, 4 months), Markus Deubel (3/4 BAT IIa, 9 months), Martin Hermatschweiler (3/4 BAT IIa, 14.5 months), Nina Meinzer (3/4 BAT IIa, 1 month), Daniel Meisel (3/4 BAT IIa, 5.5 months), Michael S. Rill (3/4 BAT IIa, 32 months), Isabelle Staude (3/4 BAT IIa, 14 months) On average, this corres...
متن کاملInternal structure in small Au crystals resolved by three-dimensional inversion of coherent x-ray diffraction
Coherent x-ray diffraction CXD is a technique which utilizes the favorable coherence properties of an x-ray beam to collect three-dimensional 3D diffraction data from which the 3D shape of a sample can be determined. The shape of the sample is found by reconstructing the phase of the diffracted wave in the far field using iterative techniques and recognizing the relationship between this comple...
متن کاملSelf-alignment of liquid crystals in three-dimensional photonic crystals.
We report on the observation of self-alignment of nematic liquid crystals into colloidal photonic crystals, over distances much larger than the typical size of the voids between the spheres. We observe that the infiltrated structure possesses a unique optical axis that is determined by an intrinsic structural anisotropy of photonic crystal opals. We develop a simple model to describe this self-...
متن کاملThree - Dimensional Tracking with Misalignment Between Display and Control Axes
University of California, Berkeley Berkeley, CA Two experiments were conducted examining . three-dimensional pursuit tracking when operators of teleoperation simulations are faced with misalignment between the display and control frames of reference. Targets on the experimental displays moved irregularly in three dimensions and were tracked by subjects using either two 2-axis joysticks and a pa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Crystallography
سال: 1995
ISSN: 0021-8898
DOI: 10.1107/s0021889894010137