Some ABO3 oxides with defect pyrochlore structure

Ramadass, N. ; Palanisamy, T. ; Gopalakrishnan, J. ; Aravamudan, G. ; Sastri, M. V. C. (1975) Some ABO3 oxides with defect pyrochlore structure Solid State Communications, 17 (4). pp. 545-547. ISSN 0038-1098

Full text not available from this repository.

Official URL:

Related URL:


Studies on the formation, structures and properties of the ternary oxides TlNbO3, TlTaO3 and BiVO3+x occurring in A2B2O7-y defect pyrochlore structure are reported. The reaction of Tl2 CO3 with Nb2O5/Ta2O5 initially leads to the formation of TlNbO3+x [x~ 0.3] and TlTaO3+x [x ~0.4]. On further heating, the phases lose oxygen forming TlTaO3 and TlNbO3. The occurrence of ABO3 oxides having Tl+, Pb2+ or Bi3+ as the A cation in defect pyrochlore structure in preference to the perovskite structure is attributed to the formation of a "trap-mediated" A-A bond through 6s2 electrons.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:12537
Deposited On:13 Nov 2010 13:23
Last Modified:03 Jun 2011 06:16

Repository Staff Only: item control page