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High pressure investigations of Na(0.025)WO(3): x-ray diffraction and Raman spectroscopy studies.
MedLine Citation:
PMID:  21860074     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
High pressure x-ray diffraction and Raman spectroscopy studies have been carried out on non-stoichiometric sodium tungsten bronze, Na(0.025)WO(3). The high pressure investigations reveal a phase transition at about 2 GPa by a change of space group symmetry from P2(1)/n to P2(1)/c in the monoclinic cell followed by a second structural transformation to a triclinic lattice around 18 GPa. There are volume changes with these structural transformations, which are driven by rotation and significant distortion of WO(6) octahedra due to the displacement of tungsten and oxygen atoms from their mean positions in the unit cell.
Authors:
Abhisek Basu; Sanhita Paul; M Polentarutti; G Bais; S Oishi; Satyabrata Raj; Goutam Dev Mukherjee
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-8-22
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  23     ISSN:  1361-648X     ISO Abbreviation:  -     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-8-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  -    
Other Details:
Languages:  ENG     Pagination:  365401     Citation Subset:  -    
Affiliation:
Department of Physical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur Campus, Nadia 741252, India.
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