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@ARTICLE{OQuinn:837289,
author = {O’Quinn, Eric C. and Shamblin, Jacob and Perlov, Brandon
and Ewing, Rodney C. and Neuefeind, Joerg and Feygenson,
Mikhail and Gussev, Igor and Lang, Maik},
title = {{I}nversion in {M}g 1– x {N}i x {A}l 2 {O} 4 {S}pinel:
{N}ew {I}nsight into {L}ocal {S}tructure},
journal = {Journal of the American Chemical Society},
volume = {139},
number = {30},
issn = {1520-5126},
address = {Washington, DC},
publisher = {American Chemical Society},
reportid = {FZJ-2017-06258},
pages = {10395 - 10402},
year = {2017},
abstract = {A wide variety of compositions adopt the isometric spinel
structure (AB2O4), in which the atomic-scale ordering is
conventionally described according to only three structural
degrees of freedom. One, the inversion parameter, is
traditionally defined as the degree of cation exchange
between the A- and B-sites. This exchange, a measure of
intrinsic disorder, is fundamental to understanding the
variation in the physical properties of different spinel
compositions. Based on neutron total scattering experiments,
we have determined that the local structure of
Mg1–xNixAl2O4 spinel cannot be understood as simply being
due to cation disorder. Rather, cation inversion creates a
local tetragonal symmetry that extends over sub-nanometer
domains. Consequently, the simple spinel structure is more
complicated than previously thought, as more than three
parameters are needed to fully describe the structure. This
new insight provides a framework by which the behavior of
spinel can be more accurately modeled under the extreme
environments important for many geophysics and
energy-related applications, including prediction of deep
seismic activity and immobilization of nuclear waste in
oxides.},
cin = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS-ESS},
ddc = {540},
cid = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
I:(DE-Juel1)JCNS-ESS-20170404},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000407089500033},
pubmed = {pmid:28683545},
doi = {10.1021/jacs.7b04370},
url = {https://juser.fz-juelich.de/record/837289},
}