orthorhombic system


orthorhombic system

      one of the structural categories systems to which crystalline solids can be assigned. Crystals in this system are referred to three mutually perpendicular axes that are unequal 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 orthorhombic unit cell is distinguished by three lines called axes of 2-fold symmetry about which the cell can be rotated by 180° without changing its appearance. This characteristic requires that the angles between any two edges of the unit cell be right angles but the edges may be any length. Alpha-sulphur, cementite, olivine, aragonite, orthoenstatite, topaz, staurolite, barite, cerussite, marcasite, and enargite crystallize in the orthorhombic system.

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Universalium. 2010.

Look at other dictionaries:

  • orthorhombic system — noun : a crystal system characterized by three unequal axes at right angles see crystal system illustration …   Useful english dictionary

  • The Orthorhombic 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

  • orthorhombic — [ôr΄thō räm′bik] adj. [ ORTHO + RHOMBIC] designating or of a crystal system having three axes of unequal length, each of which intersects at right angles with the others: see CRYSTAL SYSTEM …   English World dictionary

  • Orthorhombic — Or tho*rhom bic, a. [Ortho + rhombic.] (Crystallog.) Noting the system of crystallization which has three unequal axes at right angles to each other; trimetric. See {Crystallization}. [1913 Webster] …   The Collaborative International Dictionary of English

  • 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

  • Orthorhombic crystal system — An example of the orthorhombic crystals, aragonite In crystallography, the orthorhombic crystal system is one of the seven lattice point groups. Orthorhombic lattices result from stretching a cubic lattice along two of its orthogonal pairs by two …   Wikipedia

  • orthorhombic — /awr theuh rom bik/, adj. Crystall. noting or pertaining to a system of crystallization characterized by three unequal axes intersecting at right angles; rhombic; trimetric. Cf. crystal system. [1865 70; ORTHO + RHOMBIC] * * * …   Universalium

  • orthorhombic — adjective Etymology: International Scientific Vocabulary Date: circa 1859 of, relating to, or constituting a system of crystallization characterized by three unequal axes at right angles to each other …   New Collegiate Dictionary

  • orthorhombic — or·tho·rhom·bic .ȯr thə räm bik adj of, relating to, or constituting a system of crystallization characterized by three unequal axes at right angles to each other * * * or·tho·rhom·bic (or″tho romґbik) having three unequal axes intersected …   Medical dictionary

  • orthorhombic — [ˌɔ:θə(ʊ) rɒmbɪk] adjective denoting a crystal system with three unequal axes at right angles …   English new terms dictionary


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