octakaidecahedron

plural octakaidecahedra

1. Synonym of octadecahedron.

   It is an octakaidecahedron consisting of a pair of (004) square faces[…]

   1985 December 2, V Ramamurthy, “Electron-phonon interactions in bct white tin”, in Pramana, volume 26, pages 525–542

   5 more examples

   The compound is a clathrate hydrate, and the most notable feature of the water framework is a novel polyhedral cage, the 18-hedron (octakaidecahedron),[…]

   1966 November 28, R. K. McMullan, Truman H. Jordan, G. A. Jeffrey, “Polyhedral Clathrate Hydrates. XII. The Crystallographic Data on Hydrates of Ethylamine, Dimethylamine, Trimethylamine, n‐Propylamine (Two Forms), iso‐Propylamine, Diethylamine (Two Forms), and tert‐Butylamine”, in The Journal of Chemical Physics, volume 47

   The most interesting feature here is the appearance of a new type of polyhedral cage, the 18-hedron or octakaidecahedron (see Fig. 115).

   1967, Structure Reports, page 289

   The d-functions adapted to spherical symmetry divide the sphere in six quadrangles (around the three Cartesian axes) reserved for the e_g sub-shell and twelve hexagons for the t_(2g) sub-shell very similar to a cubic octakaidecahedron projected out to the sphere.

   1971, Christian Klixbüll Jørgensen, Modern Aspects of Ligand Field Theory, →ISBN, page 84

   This is a packing of cubes and octakaidecahedra in which there are two types of grain comer geometry.

   1981 August, Peter John Rinous, “Three-Dimensional Structures”, in Grain and Pore Morphologies in Polycrystals, thesis submitted to the University of Surrey for the degree of Doctor of Philosophy; Department of Physics, section 4 (Homogenous Structures), pages 45–46

   The rhombic faces of one-third of the rhombicdodecahedra move outwards, resulting in octakaidecahedra (8), which are equivalent to, but larger than, those of figure 2.6(b).[…]If the square faces of the octakaidecahedra continue to grow, thereby shrinking the rhombohexagonal dodecahedra, a simple cubic unimodular structure survives as shown in figure 2.6(e).

   1984 September, Irfan Ahmed, “Structures with Planar Interfaces”, in An Investigation of The Morphology of Grain Growth in Polycrystals, thesis submitted to the University of Surrey for the degree of Doctor of Philosophy; Department of Physics, section 3 (Bimodular Structures), page 15

   Synonyms: octadecahedron