Document Detail


Hydrogen Solubility in Amorphous Silica at Pressures up to 75 kbar.
MedLine Citation:
PMID:  23214986     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The solubility of hydrogen in amorphous silica at a temperature of 250°C and pressures up to 75 kbar is studied using a quenching technique. The molar ratio H2/SiO2 is found to linearly increase with pressure from X=0.16 at P=6 kbar to X=0.53 at P=75 kbar. An investigation of a sample with X=0.47 by Raman spectroscopy demonstrated that hydrogen dissolves in silica in the form of H2 molecules and these molecules occupy voids of, at least, two different types in the silica network. An X-ray diffraction study showed that the hydrogen molecules penetrating in the silica glass network prevented its irreversible densification occurring if the silica glass is compressed to the same pressure without hydrogen.
Authors:
Vadim S Efimchenko; Vladimir K Fedotov; Mikhail Kuzovnikov; Andrey Zhuravlev; Boris M Bulychev
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-7
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  -     ISSN:  1520-5207     ISO Abbreviation:  J Phys Chem B     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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