The structure and structural changes under the isothermal annealing of
(GeS₂)₁₀₀₋x(SbSI)x (0 ≤ x ≤ 90) glasses were investigated by Raman spectroscopy and
X-ray diffraction methods. The nanoheterogeneous nature of these glasses structure has
been revealed. The matrix of (GeS₂)₁₀₀₋x(SbSI)x glasses is basically built just of binary
GeS4, SbS3 and SbI3 structural groups and contains a small amount of molecular
fragments with homopolar Ge - Ge and S - S bonds. The phase structure arising in the
glass matrix at crystallization corresponds to the structure of crystalline SbSI.