Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 44, 2018
Previous Article Next Article

Small-moment paramagnetism and extensive twinning in the topochemically reduced phase Sr2ReLiO5.5

Author affiliations

Abstract

Reaction of the cation-ordered double perovskite Sr2ReLiO6 with dilute hydrogen at 475 °C leads to the topochemical deintercalation of oxide ions from the host lattice and the formation of a phase of composition Sr2ReLiO5.5, as confirmed by thermogravimetric and EELS data. A combination of neutron and electron diffraction data reveals the reduction process converts the –Sr2O2–ReLiO4–Sr2O2–ReLiO4– stacking sequence of the parent phase into a –Sr2O2–ReLiO3–Sr2O2–ReLiO4–, partially anion-vacant ordered sequence. Furthermore a combination of electron diffraction and imaging reveals Sr2ReLiO5.5 exhibits extensive twinning – a feature which can be attributed to the large, anisotropic volume expansion of the material on reduction. Magnetisation data reveal a strongly reduced moment of μeff = 0.505μB for the d1 Re6+ centres in the phase, suggesting there remains a large orbital component to the magnetism of the rhenium centres, despite their location in low symmetry coordination environments.

Graphical abstract: Small-moment paramagnetism and extensive twinning in the topochemically reduced phase Sr2ReLiO5.5

Back to tab navigation

Article information


Submitted
24 Aug 2018
Accepted
16 Oct 2018
First published
18 Oct 2018

Dalton Trans., 2018,47, 15783-15790
Article type
Paper

Small-moment paramagnetism and extensive twinning in the topochemically reduced phase Sr2ReLiO5.5

N. Hasanli, N. Gauquelin, J. Verbeeck, J. Hadermann and M. A. Hayward, Dalton Trans., 2018, 47, 15783
DOI: 10.1039/C8DT03463J

Social activity

Search articles by author

Spotlight

Advertisements