Structures of the ordered double perovskites Sr2YTaO6 and Sr2YNbO6.
The ordered perovskite Sr(2)YTaO(6), distrontium yttrium tantalum hexaoxide, has been reported as showing an unusual triclinic structure, at odds with the results from a recent group-theoretical analysis. A new investigation establishes that Sr(2)YTaO(6) and the isostructural Sr(2)YNbO(6), distrontium yttrium niobium hexaoxide, in fact both adopt the commonly occurring monoclinic structure, with the space-group symmetry P2(1)/n.
Howard
Christopher J
CJ
Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai, NSW 2234, Australia. cjh@ansto.gov.au
Barnes
Paris W
PW
Kennedy
Brendan J
BJ
Woodward
Patrick M
PM
D017610:Calcium Compounds / Q000737:chemistry; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D015394:Molecular Structure; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D017601:Oxygen Compounds / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*; D013635:Tantalum / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry; D015019:Yttrium / Q000737:chemistry*
D017610:Calcium Compounds; D010087:Oxides; D017601:Oxygen Compounds; D009556:Niobium; C059910:perovskite; D015019:Yttrium; D013635:Tantalum; D014025:Titanium; D013324:Strontium