Crystallographic elements

  • How is crystallography related to chemistry?

    Crystallographers use the properties and inner structures of crystals to determine the arrangement of atoms and generate knowledge that is used by chemists, physicists, biologists, and others..

  • How many crystallographic elements are there?

    In total there are seven crystal systems: triclinic, monoclinic, orthorhombic, tetragonal, trigonal, hexagonal, and cubic..

  • Seven crystal systems

    Each of the six crystal systems have a set of unique crystallographic axes that are defined by their unit length and the angles at which the axes intersect.
    Now instead of using symmetry operations to define the position of crystal faces in space, we want to be able to describe the positions of atoms in space..

  • Types of crystal structure with examples

    crystallography, branch of science that deals with discerning the arrangement and bonding of atoms in crystalline solids and with the geometric structure of crystal lattices.
    Classically, the optical properties of crystals were of value in mineralogy and chemistry for the identification of substances..

  • Types of crystallography

    Crystallographic properties are routinely characterized using preferential etch techniques by which pits are formed where dislocations intersect a particular crystallographic surface..

  • What are crystalline elements?

    All metallic elements (except Cs, Ga, and Hg) are crystalline solids at room temperature.
    Like ionic solids, metals and alloys have a very strong tendency to crystallize, whether they are made by thermal processing or by other techniques such as solution reduction or electroplating..

  • What are the 6 crystallographic systems?

    The seven crystal systems are triclinic, monoclinic, orthorhombic, tetragonal, trigonal, hexagonal, and cubic.
    Informally, two crystals are in the same crystal system if they have similar symmetries (albeit there are many exceptions)..

  • What are the crystallographic elements?

    These are the cubic, tetragonal, orthorhombic, monoclinic, triclinic, trigonal and hexagonal..

Monoclinic. Triclinic. Figure 3.10 Crystallographic axes in the seven crystal systems. 3.5 Description of crystals. Crystallographic axes. Crystallographic axes 
These are the cubic, tetragonal, orthorhombic, monoclinic, triclinic, trigonal and hexagonal. Some of these are further subdivided to give 14 in all.

What is a stereogram of a crystal?

All the faces of the crystal are treated in the same way, and the stereo graphic plot of all the faces is called a stereogram

Note that the poles to vertical crystal faces already plot on to the circumference of the equatorial plane and these remain unchanged in the stereogram

Crystallographic elements
Crystallographic elements

File format used for macromolecular structure data

The Macromolecular Crystallographic Information File (mmCIF) also known as PDBx/mmCIF is a standard text file format for representing macromolecular structure data, developed by the International Union of Crystallography (IUCr) and the Protein Data Bank It is an extension of the Crystallographic Information File (CIF), specifically for macromolecular data, such as proteins and nucleic acids, incorporating elements from the PDB file format.
In mathematics, a non-Euclidean crystallographic group, NEC group or N.E.C. group is a discrete group of isometries of the hyperbolic plane.
These symmetry groups correspond to the wallpaper groups in euclidean geometry.
A NEC group which contains only orientation-preserving elements is called a Fuchsian group, and any non-Fuchsian NEC group has an index 2 Fuchsian subgroup of orientation-preserving elements.

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