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Preparation and crystal structure of the La 2 Ni 12 P 5 and isotypic ternary lanthanoid—Nickel phosphides
Author(s) -
Kuz'ma Yu. B.,
Babizhet'sky V. S.,
Chykhrij S. I.,
Oryshchyn S. V.,
Pecharsky V. K.
Publication year - 1993
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19936190326
Subject(s) - phosphide , crystal structure , crystallography , ternary operation , lanthanide , materials science , stacking , nickel , lanthanum , chemistry , inorganic chemistry , metallurgy , ion , organic chemistry , computer science , programming language
The new ternary phosphide La 2 Ni 12 P 5 has been prepared by direct arc melting of the components as pure metals and red phosphorus. The crystal structure has been determined using X‐ray single crystal diffraction data. The compound exhibits a new type of crystal structure, P2 1 /m with lattice parameters a = 10.911(3), b = 3.696(2), c = 13.174(4) Å, β = 108.02(2)°, V = 505,2(6) Å 3 , Z = 2. Atomic parameters least squares refinement of 116 independent variables (anisotropic approximation for thermal vibrations) employed 1 284 independent I o (hkl); R F = 0.0278 and R W = 0.0287. The crystal structure is characterized by trigonal prismatic arrangement of phosphorus atoms stacking variant of infinite (with phosphorus centered) columns built by metal trigonal prisms ‖ [010]. Two or three such columns are connected through common edges (lanthanum atoms). The compounds RE 2 Ni 12 P 5 (where RE = Ce, Pr, Nd and Eu) display the same with La 2 Ni 12 P 5 crystal structure. Lattice parameters of these compounds have been refined using powder diffraction data.