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Encyclopedia > Coordination geometry

The coordination geometry of an atom is the geometrical pattern formed by its neighbors in a molecule or a crystal. One given atom is usually characterized by different coordination geometries. A molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. ... Quartz crystal A crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ...

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 JCE 1997 (74) 915 [Aug] A Coordination Geometry Table of the d-Block Elements and Their Ions (2198 words) Classification of coordination geometry was accomplished by a procedure that determined the best fit of the observed structure to one of the ideal coordination polyhedra. This number provides the population that was used to access the distribution of coordination geometries and, therefore, is a means to evaluate the statistical reliability of the data presented in Table 2b. The ion with the greatest propensity to adopt a trigonal planar geometry is copper(I).
 Coordinates and similar figures (591 words) Coordinates are pairs of numbers that are used to determine points in a plane, relative to a special point called the origin. Point D has coordinates (9,-2.5); it is 9 units to the right, and 2.5 units down from the origin. Point E has coordinates (-4,-3); it is 4 units to the left, and 3 units down from the origin.
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