tetragonal system

tetragonal system

      one of the structural categories to which crystalline solids can be assigned. Crystals in this system are referred to three mutually perpendicular axes, two of which are equal in length. If the atoms or atom groups in the solid are represented by points and the points are connected, the resulting lattice will consist of an orderly stacking of blocks, or unit cells. The tetragonal unit cell is distinguished by an axis of fourfold symmetry, about which a rotation of the cell through an angle of 90° brings the atoms into coincidence with their initial positions. The elements boron and tin can crystallize in tetragonal form, as can some minerals such as zircon.

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  • tetragonal system — tetragoninė sistema statusas T sritis chemija apibrėžtis Kristalografinė sistema, kuriai būdinga ketvirtosios eilės simetrijos ašis. atitikmenys: angl. dimetric system; tetragonal system rus. тетрагональная система …   Chemijos terminų aiškinamasis žodynas

  • tetragonal system — noun : a crystal system (as in the right square prism) characterized by three axes at right angles of which only the two lateral axes are equal compare rhombohedral system; see crystal system illustration …   Useful english dictionary

  • tetragonal system — noun Date: 1879 a crystal system characterized by three axes at right angles of which only the two lateral axes are equal …   New Collegiate Dictionary

  • tetragonal system — /tɛˈtrægənəl sɪstəm/ (say te traguhnuhl sistuhm) noun a system of crystallisation in which all three axes are at right angles to one another, and the two equal lateral axes differ in length from the third axis …  

  • The Tetragonal system — Crystallization Crys tal*li*za tion (kr[i^]s tal*l[i^]*z[=a] sh[u^]n), n. [Cf. F. cristallization.] 1. (Chem. & Min.) The act or process by which a substance in solidifying assumes the form and structure of a crystal, or becomes crystallized; the …   The Collaborative International Dictionary of English

  • Tetragonal — Te*trag o*nal, a. 1. (Geom.) Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers. [1913 Webster] 2. (Bot.) Having four prominent longitudinal… …   The Collaborative International Dictionary of English

  • tetragonal — adjective Etymology: Late Latin tetragonalis having four angles and four sides, from tetragonum quadrangle, from Greek tetragōnon, from neuter of tetragōnos tetragonal, from tetra + gōnia angle more at gon Date: 1868 of, relating to, or… …   New Collegiate Dictionary

  • tetragonal — /tɛˈtrægənəl/ (say te traguhnuhl) adjective 1. relating to a tetragon. 2. Crystallography denoting or relating to the tetragonal system. {tetragon + al1} …  

  • tetragonal — [te trag′ə nəl] adj. 1. of, or having the form of, a tetragon; quadrangular 2. designating or of a crystal system having three axes that intersect at right angles with one another, two of which are of equal length: see CRYSTAL SYSTEM …   English World dictionary

  • system — [sis′təm] n. [LL systema < Gr systēma (gen. systēmatos) < synistanai, to place together < syn , together + histanai, to set: see STAND] 1. a set or arrangement of things so related or connected as to form a unity or organic whole [a… …   English World dictionary

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