TY - JOUR
T1 - Synthesis and crystal structure of CuZrTiO5-A new crystal structure type
AU - Troitzsch, Ulrike
AU - Christy, Andrew G.
AU - Willis, Anthony C.
AU - Ellis, David J.
PY - 2010/3
Y1 - 2010/3
N2 - A new compound, CuZrTiO5, was synthesized as strongly pleochroic green crystals from the oxides between 995 and 1010 °C, 1 atm. Its crystal structure was determined by single crystal XRD, resulting in R (F2>2σ(F2))=0.032 and wR (all data)=0.079). CuZrTiO5 is orthorhombic, space group P212121, a=3.5871(3) Å, b=6.6968(4) Å, c=14.6679(9) Å, V=352.35(4) Å3, Z=4. The structure is topologically similar to In2TiO5 but differs in space group and cation coordination. CuZrTiO5 has relatively regular TiO6 polyhedra, but coordination is 7+1 for Zr, and 4+2 for Cu due to the Jahn-Teller effect. Ordering of the long Cu-O bonds causes reduction in symmetry relative to In2TiO5. Layers of Cu alternate with Ti+Zr on (001), giving rise to a distinct cleavage. Bond valence sums on Ti and Zr are far from ideal, which appears due to the limited ability of this structural topology to avoid close next-nearest neighbour distances.
AB - A new compound, CuZrTiO5, was synthesized as strongly pleochroic green crystals from the oxides between 995 and 1010 °C, 1 atm. Its crystal structure was determined by single crystal XRD, resulting in R (F2>2σ(F2))=0.032 and wR (all data)=0.079). CuZrTiO5 is orthorhombic, space group P212121, a=3.5871(3) Å, b=6.6968(4) Å, c=14.6679(9) Å, V=352.35(4) Å3, Z=4. The structure is topologically similar to In2TiO5 but differs in space group and cation coordination. CuZrTiO5 has relatively regular TiO6 polyhedra, but coordination is 7+1 for Zr, and 4+2 for Cu due to the Jahn-Teller effect. Ordering of the long Cu-O bonds causes reduction in symmetry relative to In2TiO5. Layers of Cu alternate with Ti+Zr on (001), giving rise to a distinct cleavage. Bond valence sums on Ti and Zr are far from ideal, which appears due to the limited ability of this structural topology to avoid close next-nearest neighbour distances.
KW - Bond valence
KW - Crystal structure
KW - CuZrTiO
KW - InTiO
KW - Polyhedral distortion
KW - Synthesis
UR - http://www.scopus.com/inward/record.url?scp=77649192033&partnerID=8YFLogxK
U2 - 10.1016/j.jssc.2010.01.005
DO - 10.1016/j.jssc.2010.01.005
M3 - Article
SN - 0022-4596
VL - 183
SP - 668
EP - 675
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
IS - 3
ER -