TY - JOUR
T1 - Neutron and x-ray powder diffraction studies of the oxynitrides SrW(O,N)3, Ba3W2(O,N)8 and Ba3Mo2(O,N)8
AU - Weller, Mark T.
AU - Skinner, Stephen J.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - Oxynitrides of composition SrW(O,N)3, Ba3W2(O,N)8 and Ba3Mo2(O,N)8 have been prepared by the ammonolysis of stoichiometric mixtures of oxides and carbonates. Combined Rietveld refinements of powder neutron and powder X-ray diffraction data have allowed the structure of each to be determined. SrW(O,N)3 was found to have a cubic Perovskite structure whereas Ba3W2(O,N)8 and Ba3Mo2(O,N)8 have a layered hexagonal structure. In the hexagonal structures the oxygen and nitrogen atoms are distributed almost randomly over two sites in the unit cell producing 4-fold co-ordination to tungsten and molybdenum, a distorted octahedral co-ordination to one barium site and a 10-fold co-ordination to the other.
AB - Oxynitrides of composition SrW(O,N)3, Ba3W2(O,N)8 and Ba3Mo2(O,N)8 have been prepared by the ammonolysis of stoichiometric mixtures of oxides and carbonates. Combined Rietveld refinements of powder neutron and powder X-ray diffraction data have allowed the structure of each to be determined. SrW(O,N)3 was found to have a cubic Perovskite structure whereas Ba3W2(O,N)8 and Ba3Mo2(O,N)8 have a layered hexagonal structure. In the hexagonal structures the oxygen and nitrogen atoms are distributed almost randomly over two sites in the unit cell producing 4-fold co-ordination to tungsten and molybdenum, a distorted octahedral co-ordination to one barium site and a 10-fold co-ordination to the other.
UR - http://www.scopus.com/inward/record.url?scp=0033755085&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1016/S1466-6049(00)00032-5
U2 - 10.1016/S1466-6049(00)00032-5
DO - 10.1016/S1466-6049(00)00032-5
M3 - Article
AN - SCOPUS:0033755085
SN - 1466-6049
VL - 2
SP - 463
EP - 467
JO - International Journal of Inorganic Materials
JF - International Journal of Inorganic Materials
IS - 5
ER -