- cluster compounds
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English-Bulgarian polytechnical dictionary . 2013.
cluster compounds
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Cluster chemistry — In chemistry, a cluster is an ensemble of bound atoms intermediate in size between a molecule and a bulk solid. Clusters exist of diverse stoichiometries and nuclearities. For example, carbon and boron atoms form fullerene and borane clusters,… … Wikipedia
Cluster headache — Classification and external resources The Cluster Headache by JD Fletcher ICD 10 G44 … Wikipedia
cluster — clusteringly, adv. clustery, adj. /klus teuhr/, n. 1. a number of things of the same kind, growing or held together; a bunch: a cluster of grapes. 2. a group of things or persons close together: There was a cluster of tourists at the gate. 3. U.S … Universalium
Cluster analysis — The result of a cluster analysis shown as the coloring of the squares into three clusters. Cluster analysis or clustering is the task of assigning a set of objects into groups (called clusters) so that the objects in the same cluster are more… … Wikipedia
Octahedral cluster — Octahedral clusters are inorganic or organometallic cluster compounds composed of six metals in an octahedral array.[1] One important class of octahedral clusters are chalcohalide clusters of the type M … Wikipedia
Gold cluster — Gold clusters in cluster chemistry are gold derived materials that can either be discrete molecules or larger colloidal particles. Both types are describes as nanoparticles, with diameters of less than one micrometer. Discrete gold clustersWell… … Wikipedia
Cancer cluster — is a term used by epidemiologists, statisticians, and public health workers to define an occurrence of a greater than expected number of cancer cases within a group of people in a geographic area over a period of time.… … Wikipedia
List of inorganic compounds — Tentative listing related to this page, inorganic compounds by element (presently under construction), as well as . This list is not necessarily complete or up to date ndash; if you see an article that should be here but isn t (or one that… … Wikipedia
Polyhedral skeletal electron pair theory — In chemistry the polyhedral skeletal electron pair theory provides electron counting rules useful for predicting the structures of clusters such as borane and carborane clusters. The electron counting rules were originally formulated by Kenneth… … Wikipedia
chemical bonding — ▪ chemistry Introduction any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another … Universalium
Crystal structure of boron-rich metal borides — Two single crystals of YB66 (1 cm diameter) grown by floating zone technique using (100) oriented seeds. In the top crystal, the seed (left from the black line) has same diameter as the crystal. In the bottom crystal (sliced), the seed is much… … Wikipedia
