Related Experiment Video
Updated: Aug 9, 2026

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
Published on: April 28, 2016
Mercury Thiogermanate Glasses HgS-GeS2: Vibrational, Macroscopic, and Electric Properties
Rayan Zaiter1, Mohammad Kassem1, Maria Bokova1
1Université du Littoral Côte d'Opale (ULCO), LPCA, EA 4493, F-59140 Dunkerque, France.
Abstract:
Glasses in the pseudo-binary system (HgS) (GeS2)1- were synthesized over the concentration range of 0.0 ≤ x ≤ 0.5. The fundamental glass properties (macroscopic, electric, and vibrational) were studied using differential scanning calorimetry (DSC), direct current (dc) electrical measurements, Raman spectroscopy supported by DFT modeling, and X-ray diffraction. Mercury species in thiogermanate glasses essentially form chain-like (HgS2/2) fragments substituting bridging sulfur between corner- and edge-sharing GeS4/2 tetrahedra. This structural evolution results in a significant monotonic decrease of the glass transition temperatures from 480 to 270 °C. The room-temperature dc conductivity changes non-monotonically with increasing HgS content x over a limited range of 4 × 10-15 to 7 × 10-13 S cm-1. The electronic transport in insulating HgS-GeS2 glasses occurs via extended electronic states. Tetrahedral HgS4/4 fragments also appear in the glass network with increasing x. Their exact population needs further advanced structural studies using diffraction techniques.
More Related Videos
Related Concept Videos
Emission Spectra
Ionic Bonding and Electron Transfer
NMR Spectroscopy: Chemical Shift Overview
For instance, the proton...
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
UV–Vis Spectroscopy: Molecular Electronic Transitions
Transmission Electron Microscopy

