Investigations of the phase relations in the quaternary systems Bi2O3/Bi(2)Ch '(3)/Bi(2)Ch ''(3) (Ch = S, Se, Te) - II. The system Bi2O3/Bi2Se3/Bi2Te3 - the crystal structure of Bi2O2(TexSe1-x) [German]

摘要

The existence of a complete series of mixed crystals Bi2O2(TexSe1-x), 0 less than or equal to x less than or equal to 1 in the pseudobinary system Bi2O2Se/Bi2O2Te has been detected by solid state reactions. The crystal structure of the ternary phase Bi2O2Se was refined on the basis of single crystal measurements. The crystallographic data for Bi2O2Te and for compositions of the mixed crystals were obtained using powder x-ray measurements: Bi2O2Se I4/mmm (No. 139); Z = 2; a = 3.887(1). c = 12.164(2) Angstrom, Bi2O2Te0,5Se0,5 I4/mmm (No. 139); Z = 2; a = 3.934(1), c = 12.454(2) Angstrom, Bi2O2Te I4/mmm (No. 139); Z = 2; a = 3.983(1), c = 12.699(2) Angstrom. [References: 19]