Crystal Structure

In mineralogy and crystallography, crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid. A crystal structure is composed of a pattern, a set of atoms arranged in a particular way, and a lattice exhibiting long-range order and symmetry. Patterns are located upon the points of a lattice, which is an array of points repeating periodically in three dimensions. The points can be thought of as forming identical tiny boxes, called unit cells, that fill the space of the lattice. The lengths of the edges of a unit cell and the angles between them are called the lattice parameters. The symmetry properties of the crystal are embodied in its space group.

A crystal's structure and symmetry play a role in determining many of its physical properties, such as cleavage, electronic band structure, and optical transparency.

Read more about Crystal StructureUnit Cell, Classification, Grain Boundaries, Defects and Impurities, Prediction of Structure, Polymorphism, Physical Properties

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SULF1 - Structure and Mechanism
... The x-ray crystal structure of neither Sulf1 or Sulf2 has been attempted, but ARSA active site crystal structure was deciphered ... The crystal structure and residue mutations need to be performed in Sulf1 and Sulf2 to determine if any differences exist from lysosomal sulfatases ...
Crystallographic Database - Crystal Phase Identification
... Crystalline material may be divided into single crystals, twin crystals, polycrystals, and crystal powder ... In a single crystal, the arrangement of atoms, ions, or molecules is defined by a single crystal structure in one orientation ... Twin crystals, on the other hand, consist of single-crystalline twin domains, which are aligned by twin laws and separated by domain walls ...
Crystal Structure - Physical Properties
... Twenty of the 32 crystal classes are piezoelectric, and crystals belonging to one of these classes (point groups) display piezoelectricity ... not a material is polar is determined solely by its crystal structure ... All polar crystals are pyroelectric, so the 10 polar crystal classes are sometimes referred to as the pyroelectric classes ...
Crystal Chemistry
... Crystal chemistry is the study of the principles of chemistry behind crystals and their use in describing structure-property relations in solids ... The principles that govern the assembly of crystal and glass structures are described, models of many of the technologically important crystal structures (Zinc ... describing the crystal structure of important materials and determining their atomic models ...
Multislice - Background
... The mapping from a crystal structure to its image or diffraction pattern has been relatively well understood and documented ... from electron micrograph images to the crystal structure is generally more complicated ... The fact that the images are two dimensional projections of three dimensional crystal structurse it makes it tedious to compare these projections to all plausible crystal structures ...

Famous quotes containing the words structure and/or crystal:

    When a house is tottering to its fall,
    The strain lies heaviest on the weakest part,
    One tiny crack throughout the structure spreads,
    And its own weight soon brings it toppling down.
    Ovid (Publius Ovidius Naso)

    A crystal of breath,
    your irreversible
    Paul Celan [Paul Antschel] (1920–1970)