Mercury Sulphide Dimorphism in Thiogermanate Glasses

DOI

Crystalline mercury sulphide exists in two drastically different polymorphic forms: red chain-like insulator, alpha-HgS, and black tetrahedral narrow-band semiconductor, beta-HgS. Using pulsed neutron and high-energy X-ray diffraction, we have shown recently that these two mercury bonding pattern are present simultaneously in mercury thioarsenate glasses HgS-As2S3 and govern their electronic, thermal and transport properties. Vitreous arsenic sulphide is a 2D glass formed by AsS3/2 pyramids and the maximum fraction of tetrahedral mercury HgS4/4 is about 30 % for the HgS-As2S3 glass system. The question arises whether this fraction will be higher or even predominant for tetrahedral glassy host GeS2. The neutron diffraction studies of (HgS)x(GeS2)1-x glasses, 0 < x < 0.6, will give a definitive answer useful for practical applications of these new promising disordered systems.

Identifier
DOI https://doi.org/10.5286/ISIS.E.87816119
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/87816119
Provenance
Creator Dr Alex Hannon; Professor Eugene Bychkov; Dr Mariana Milochova; Professor TAKESHI USUKI; Professor Takeshi Usuki
Publisher ISIS Neutron and Muon Source
Publication Year 2020
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2017-09-21T07:00:00Z
Temporal Coverage End 2017-09-25T08:57:05Z