Search results
Results from the WOW.Com Content Network
Inorganic Crystal Structure Database (ICSD) is a chemical database founded in 1978 by Günter Bergerhoff at the University of Bonn in Germany and I. D. Brown at McMaster University in Canada. [ 1 ] [ 2 ] It is now produced by FIZ Karlsruhe in Europe and the U.S. National Institute of Standards and Technology .
Crystal structure visualization can be integrated into a crystallographic database. Alternatively, the crystal structure data are exchanged between the database and the visualization software, preferably using the CIF format. [33] Web-based crystallographic databases can integrate crystal structure visualization capability. [34]
In crystallography, crystal structure is a description of ordered arrangement of atoms, ions, or molecules in a crystalline material. [1] Ordered structures occur from intrinsic nature of constituent particles to form symmetric patterns that repeat along the principal directions of three-dimensional space in matter.
One structure is the "interpenetrating primitive cubic" structure, also called a "caesium chloride" or B2 structure. This structure is often confused for a body-centered cubic structure because the arrangement of atoms is the same. However, the caesium chloride structure has a basis composed of two different atomic species.
Inorganic Material Database National Institute for Materials Science: crystal structures "AtomWork". 82,000 Beilstein Beilstein database: Elsevier: organic compounds properties closed access BIAdb Benzylisoquinoline Alkaloid Database "BIAdb". 846 BindingDB The Binding Database
In a crystal structure the coordination geometry of an atom is the geometrical pattern of coordinating atoms where the definition of coordinating atoms depends on the bonding model used. [1] For example, in the rock salt ionic structure each sodium atom has six near neighbour chloride ions in an octahedral geometry and each chloride has ...
An ideal crystal has every atom in a perfect, exactly repeating pattern. [19] However, in reality, most crystalline materials have a variety of crystallographic defects: places where the crystal's pattern is interrupted. The types and structures of these defects may have a profound effect on the properties of the materials.
Crystal structure of spinel. The space group for a spinel group mineral may be Fd 3 m (the same as for diamond), but in some cases (such as spinel itself, MgAl 2 O 4, beyond 452.6 K [10]) it is actually the tetrahedral F 4 3m. [11] [12] [13] [14]