Details of Grant 

EPSRC Reference:	GR/R29017/01
Title:	New Anisotropic Complex Chalcogenides and Halides.
Principal Investigator:	Claridge, Dr JB
Other Investigators:
Researcher Co-Investigators:
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Department:	Chemistry
Organisation:	University of Liverpool
Scheme:	Fast Stream
Starts:	25 March 2002	Ends:	24 September 2003	Value (£):	61,850
EPSRC Research Topic Classifications:	Chemical Synthetic Methodology
EPSRC Industrial Sector Classifications:	No relevance to Underpinning Sectors
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Panel History:
Summary on Grant Application Form
Materials with highly anisotropic structures have attracted considerable theoretical and experimental attention from the solid-state chemistry and physics community. This is primarliy due to the fact that many intersting physical phenomena are associated with highly anisotropic (low dimensional) interactions. Of particular relevance to proposed work is the large volume of work reported on the magnetic properties of halides adopting the BaNiO3/2H - perovskite structure type, contaning one-dimentional chains of face - sharing octahedra. The 2h - perovskite is the end member of a large family of closely structually related hihly compositionally flexible materials with the general formula A1+x(A'xB1-x)x3. This compositional flexibility means that we can vary the adevanyage oxidation state of a particular metal while maintaining essentially linear face sharing six coordinate metal atom chains. This contrasts with the large variety of phase related to cubic perovskites where either the local coordination number or the linking of the metal ions tends to be heavily dependent on the composition. This flexibility has been exploited by several groups in the synthesis of a wide range of oxides. It is proposaed to expand this family to the halides and chalcogenide phase which will also provide an interesting comparison with the oxides due to their greater covalency. This will lead to broarder bands as well asa small energy separatyion between the partially filled metal bands and filled anion bands, the effect of which can be sen in the varied anion-anion interactions observed in chalcogenides. The structural characterisation of the new phase will exploit recent advances in the applictaion of the higher dimensional crystallography.
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Organisation Website:	http://www.liv.ac.uk