Results 181 to 190 of about 17,445 (204)

Pyrochlores. X. Madelung energies of pyrochlores and defect fluorites

Canadian Journal of Chemistry, 1976
Electrostatic (Madelung) lattice energies have been calculated for a wide range of compounds A2B2X6Y with the pyrochlore-type structure. The cases of disorder and partial disorder on the non-metal sites have been examined, as well as the inverse case, where Y is a positive ion.
William W. Barker, Peter S. White, Osvald Knop   +2 more
openaire   +1 more source

Luminescence of Pyrochlores

Journal of Solid State Chemistry, 1994
Abstract The luminescence of the pyrochlores Y2Ti2O7, Cd2Nb2O7, and Pb2Nb2O7 is reported and discussed. Relations with the luminescence of comparable compounds is made.
M. Hamoumi, M. Wiegel, G. Blasse
openaire   +1 more source

Zirconate pyrochlores under high pressure

Physical Chemistry Chemical Physics, 2010
Ab initio total-energy calculations and X-ray diffraction measurements have been combined to study the phase stability of zirconate pyrochlores (A(2)Zr(2)O(7); A = La, Nd and Sm) under pressures up to 50 GPa. Phase transformations to the defect-cotunnite structure are theoretically predicted at pressures of 22, 20 and 18 GPa, in excellent agreement ...
H Y, Xiao, F X, Zhang, Fei, Gao, M, Lang, Rodney C, Ewing, W J, Weber   +5 more
openaire   +2 more sources

Murataite–Pyrochlore Series: A Family of Complex Oxides with Nanoscale Pyrochlore Clusters

Angewandte Chemie International Edition, 2010
identified murataite in a Synroc matrixwith imitators of HLRWs from PO Mayak, a radiochemicalfacility for production and reprocessing of nuclear fuel in theRussian Federation. Five volume percent of this phaseaccumulated about 40% of the total uranium present in thesample,andthisledtodetailedinvestigationsofthechemistryand properties of murataite, in ...
Sergey V, Krivovichev, Sergey V, Yudintsev, Sergey V, Stefanovsky, Natalia I, Organova, Oksana V, Karimova, Vadim S, Urusov   +5 more
openaire   +2 more sources

The new pyrochlore Gd2GaSbO7

Journal of Physics and Chemistry of Solids, 1984
Preparation du compose a partir d'un melange Ga 2 O 3 , Sb 2 O 3 et Gd 2 O 3 dans les rapports molaires 1:1:2, par chauffage a l'air a differentes temperatures.
P. Garcia Casado, I. Rasines
openaire   +1 more source

Disorder in Pyrochlore Oxides

Journal of the American Ceramic Society, 2000
Contour plots of disorder reaction energies across a wide variety of A 2 B 2 O 7 pyrochlore oxides have been produced, using atomistic simulation calculations based on energy‐minimization techniques.
Licia Minervini, Robin W. Grimes, Kurt E. Sickafus   +2 more
openaire   +1 more source

Crystal Chemistry of Pyrochlore

Journal of the American Ceramic Society, 1962
Analyses of natural minerals suggest the wide variety of both cationic and anionic substitutions possible in the pyrochlore structure. Limits on the possibilities of ionic substitution in pyrochlore have been determined by the preparation of a large number of compounds.
EUGENE ALESHIN, RUSTUM ROY
openaire   +1 more source

Nanoscale Manipulation of Pyrochlore

2001
Physical Review ...
Boatner, L. A., Chen, J., Lian, J., Wang, L. M., Wang, S. X.   +4 more
openaire   +1 more source

EXPERIMENTAL STUDIES OF FRUSTRATED PYROCHLORE ANTIFERROMAGNETS

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Bruce D. Gaulin, Jason S. Gardner
openaire   +1 more source

ChemInform Abstract: Pyrochlore‐Type Tin Niobate.

ChemInform, 2001
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Cruz, Luisa Paula, Savariault, Jean-Michel, Rocha, Joao   +2 more
openaire   +2 more sources