The structure of the lithium-rich garnets li6la2m2o12 and li6.4sr1.4la1.6m2o12 (m = sb, ta)

Tools

O'Callaghan, M.P. and Cussen, E.J. (2008) The structure of the lithium-rich garnets li6la2m2o12 and li6.4sr1.4la1.6m2o12 (m = sb, ta). Solid State Sciences, 10 (4). pp. 390-395. ISSN 1293-2558 (https://doi.org/10.1016/j.solidstatesciences.2007....)

[thumbnail of Revised_EJCussen_Li_rich_Garnets_text.doc] Microsoft Word. Filename: Revised_EJCussen_Li_rich_Garnets_text.doc
Accepted Author Manuscript
Download (94kB)
[thumbnail of EJCussen_Li_rich_Garnets_Fig_5.tif]
Preview
 Image (TIFF). Filename: EJCussen_Li_rich_Garnets_Fig_5.tif
Preprint
Download (1MB)| Preview
[thumbnail of EJCussen_Li_rich_Garnets_Fig_1.tif]
Preview
 Image (TIFF). Filename: EJCussen_Li_rich_Garnets_Fig_1.tif
Preprint
Download (3MB)| Preview
[thumbnail of EJCussen_Li_rich_Garnets_Fig_4.tif]
Preview
 Image (TIFF). Filename: EJCussen_Li_rich_Garnets_Fig_4.tif
Preprint
Download (1MB)| Preview
[thumbnail of EJCussen_Li_rich_Garnets_Table1.doc] Microsoft Word. Filename: EJCussen_Li_rich_Garnets_Table1.doc
Preprint
Download (56kB)
[thumbnail of EJCussen_Li_rich_Garnets_Fig_3.tif]
Preview
 Image (TIFF). Filename: EJCussen_Li_rich_Garnets_Fig_3.tif
Preprint
Download (1MB)| Preview
[thumbnail of EJCussen_Li_rich_Garnets_Table3_Revised.doc] Microsoft Word. Filename: EJCussen_Li_rich_Garnets_Table3_Revised.doc
Preprint
Download (64kB)
[thumbnail of EJCussen_Li_rich_Garnets_Fig_2.tif]
Preview
 Image (TIFF). Filename: EJCussen_Li_rich_Garnets_Fig_2.tif
Preprint
Download (1MB)| Preview
[thumbnail of EJCussen_Li_rich_Garnets_Table2.doc] Microsoft Word. Filename: EJCussen_Li_rich_Garnets_Table2.doc
Preprint
Download (41kB)

Abstract

Lithium garnets of the composition Li6SrLa2M2O12 and Li6.4Sr1.4La1.6M2O12 (M = Sb, Ta) have been prepared by solid state methods. Stuctural refinement against neutron powder diffraction data shows that these compounds crystallise in the space group Ia (3) over bard with lattice parameters in the range a = 12.85750(14) angstrom for Li6SrLa2Ta2O12 to 12.91371(13) angstrom for Li6.4Sr1.4La1.6Sb2O12. The observed increase in lattice parameter between M = Ta and Sb in both the Li6SrLa2M2O12 and Li6.4Sr1.4La1.6M2O12 compounds arises as a result of the different polarisabilities of these two cations. These phases contain a disordered arrangement of Sr2+/La3+ in eightfold coordination and Ta/Sb in fully-occupied oxide octahedra. All compounds contain lithium in a mixture of partially occupied tetrahedral and octahedral interstices with considerable positional disorder observed in the latter. Increasing the lithium stoichiometry causes a reduction in the occupation of the tetrahedrally-coordinated sites and a simultaneous increase in the concentration of lithium found within the oxide octahedra.

ORCID iDs

O'Callaghan, M.P. and Cussen, E.J. ORCID logoORCID: https://orcid.org/0000-0002-2899-6888;
CORE (COnnecting REpositories)