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Title: Crystal structure of {alpha} Triple-Prime -(Zn{sub 1-x}Cd{sub x}){sub 3}As{sub 2} (x = 0.26)

Single crystals of the {alpha} Triple-Prime -phase of (Zn{sub 1-x}Cd{sub x}){sub 3}As{sub 2} solid solution (x = 0.26) have been prepared and investigated by X-ray diffraction analysis. The tetragonal unit-cell parameters are found to be a = b = 8.5377(2) A, c = 24.0666(9) A, sp. gr. I4{sub 1}/amd, Z = 16. Zn and Cd atoms in the crystal statistically occupy three symmetrically independent positions in the mirror planes and are tetrahedrally coordinated by arsenic atoms. (Zn,Cd) tetrahedra share edges to form a three-dimensional structure framework. The {alpha} Triple-Prime -phase is geometrically related to the fluorite structure. The character of arrangement of tetrahedral vacancies in fluorite-like unit cells is revealed. Chains of tetrahedral vacancies form microchannels oriented parallel the a and b axes, which pierce the three-dimensional structure framework at different levels along the c axis. The structure of {alpha} Double-Prime -Cd{sub 3}As{sub 2} crystals is found to be similar to that of {alpha} Triple-Prime -(Zn{sub 0.74}Cd{sub 0.26}){sub 3}As{sub 2}.
Authors:
 [1] ;  [2] ;  [1]
  1. Academy of Sciences of Moldova, Institute of Applied Physics (Moldova, Republic of)
  2. Belgorod State University (Russian Federation)
Publication Date:
OSTI Identifier:
22121694
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 58; Journal Issue: 4; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CADMIUM ARSENIDES; FLUORITE; MONOCRYSTALS; SOLID SOLUTIONS; TETRAGONAL LATTICES; VACANCIES; X-RAY DIFFRACTION; ZINC ARSENIDES