21 Übersetzungen
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Anwendungsbeispiele Englisch
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- Combinations of operations of the crystallographic point groups with the addition symmetry operations produce the 230 crystallographic space groups.
- Depending on the symmetry of a crystal structure (as determined by one of the 32 possible crystallographic point groups), crystals in that group may be forced to be isotropic (not birefringent), to have uniaxial symmetry, or neither in which case it is a biaxial crystal.
- This involved measuring the angles of crystal faces relative to each other and to theoretical reference axes (crystallographic axes), and establishing the symmetry of the crystal in question.
- A crystal has no spatial uncertainty at all, except for crystallographic defects, and a (perfect) crystal allows us to localize the molecules using the crystal symmetry group.
- Icosahedral symmetry is not compatible with translational symmetry, so there are no associated crystallographic point groups or space groups.
- According to the crystallographic restriction theorem, only a limited number of point groups are compatible with discrete translational symmetry: 27 from the 7 infinite series, and 5 of the 7 others.
- The symmetry notation introduced by Hermann and Charles-Victor Mauguin, which later became an international standard notation for crystallographic groups known as the Hermann–Mauguin notation or International notation.
- In crystallography, space groups are also called the crystallographic or Fedorov groups, and represent a description of the symmetry of the crystal.
- the distance between sample and detector is computed using known crystallographic data of the reference reflexion, a uniformly gridded map for the representative fiber plane in reciprocal space is constructed and the diffraction data are fed into this map.
- In mathematics, a non-Euclidean crystallographic group, NEC group or N.E.C.
- There are 219 possible crystal symmetries (230 is commonly cited, but this treats chiral equivalents as separate entities), called crystallographic space groups.
- The hallmark of molecular excitons in organic molecular crystals are doublets and/or triplets of exciton absorption bands strongly polarized along crystallographic axes.
- Wulfenite crystallizes in the tetragonal system and possesses nearly equal axial ratios; as a result, it is considered to be crystallographically similar to scheelite(CaWO4).
© dict.cc English-German dictionary 2024
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