trigonal symmetry

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• Trigonal pyramidal molecular geometry — Infobox molecular geometry Symmetry group= C3v Electron direction=4 Atom direction=3 Bond angle …   Wikipedia

• Trigonal bipyramidal molecular geometry — Infobox molecular geometry Symmetry group= D3h Electron direction=5 Atom direction=5 Bond angle=90°, 120° mu= 0 Examples=PF5 In chemistry a trigonal bipyramid formation is a molecular geometry with one atom at the center and 5 more atoms at the… …   Wikipedia

• Trigonal planar molecular geometry — In chemistry, trigonal planar is a molecular geometry with one atom at the center and three atoms at the corners of a triangle all in one planeFact|date=January 2008. In an ideal trigonal planar species, all three ligands are identical and all… …   Wikipedia

• trigonal system — ▪ crystallography also called  Rhombohedral System,        one of the structural categories to which crystalline solids can be assigned. The trigonal system is sometimes considered to be a subdivision of the hexagonal system.       Components of… …   Universalium

• trigonal — adjective Date: 1878 of, relating to, or being the division of the hexagonal crystal system or the forms belonging to it characterized by a vertical axis of threefold symmetry • trigonally adverb …   New Collegiate Dictionary

• trigonal — trigonally, adv. /trig euh nl/, adj. 1. of, pertaining to, or shaped like a triangle; having three angles; triangular. 2. Crystall. having threefold symmetry. [1560 70; TRIGON + AL1] * * * …   Universalium

• trigonal — trig•o•nal [[t]ˈtrɪg ə nl[/t]] adj. 1) math. of, pertaining to, or shaped like a triangle; having three angles; triangular 2) cry (of a crystal) having threefold symmetry • Etymology: 1560–70 trig′o•nal•ly, adv …   From formal English to slang

• trigonal — /ˈtrɪgənəl/ (say triguhnuhl) adjective 1. triangular. 2. Crystallography having threefold symmetry. {Latin trigōnālis} …  

• trigonal — adj. 1 triangular; of or relating to a triangle. 2 Biol. triangular in cross section. 3 (of a crystal etc.) having an axis with threefold symmetry. Derivatives: trigonally adv. Etymology: med.L trigonalis (as TRIGON) …   Useful english dictionary

• Molecular symmetry — in chemistry describes the symmetry present in molecules and the classification of molecules according to their symmetry. Molecular symmetry is a fundamental concept in chemistry, as it can predict or explain many of a molecule s chemical… …   Wikipedia

• 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