B. Wedel et al., ISOLATED INFINITY(1) [TEO5] CHAINS OF OCT AHEDRA IN THE LEAD TELLURATE PB2TEO5, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 53(3), 1998, pp. 287-290
Single crystals of Pb2TeO5 have been prepared by flux techniques. X-ra
y investigations showed a new crystal structure with monoclinic symmet
ry, space group C-s(4)-Cc, a = 13.099(3), b = 5.714(1), c = 7.520(2) A
ngstrom, beta = 123,80(3)degrees, Z = 4. Pb2TeO5 is characterized by (
1)(infinity)[TeO5] chains of octahedra isolated from each other and in
corporated into an edge, corner and face connected frame of PbO7 polyh
edra. Possible positions of the lone pair of electrons of Pb2+ are est
imated by calculations of Coulomb terms of lattice energy.