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@ARTICLE{Pandelus:904125,
author = {Pandelus, Samantha B. and Kennedy, Brendan J. and Murphy,
Gabriel and Brand, Helen E. and Keegan, Elizabeth and Pring,
Allan and Popelka-Filcoff, Rachel S.},
title = {{P}hase {A}nalysis of {A}ustralian {U}ranium {O}re
{C}oncentrates {D}etermined by {V}ariable {T}emperature
{S}ynchrotron {P}owder {X}-ray {D}iffraction},
journal = {Inorganic chemistry},
volume = {60},
number = {15},
issn = {0020-1669},
address = {Washington, DC},
publisher = {American Chemical Society},
reportid = {FZJ-2021-05695},
pages = {11569 - 11578},
year = {2021},
abstract = {The chemical speciation of uranium oxides is sensitive to
the provenance of the samples and their storage conditions.
Here, we use diffraction methods to characterize the phases
found in three aged (>10 years) uranium ore concentrates of
different origins as well as in situ analysis of the
thermally induced structural transitions of these materials.
The structures of the crystalline phases found in the three
samples have been refined, using high-resolution synchrotron
X-ray diffraction data. Rietveld analysis of the samples
from the Olympic Dam and Ranger uranium mines has revealed
the presence of crystalline α-UO2(OH)2, together with
metaschoepite (UO2)4O(OH)6·5H2O, in the aged U3O8 samples,
and it is speculated that this forms as a consequence of the
corrosion of U3O8 in the presence of metaschoepite. The
third sample, from the Beverley uranium mine, contains the
peroxide [UO2(η2-O2)(H2O)2] (metastudtite) together with
α-UO2(OH)2 and metaschoepite. A core–shell model is
proposed to account for the broadening of the diffraction
peaks of the U3O8 evident in the samples.},
cin = {IEK-6},
ddc = {540},
cid = {I:(DE-Juel1)IEK-6-20101013},
pnm = {1411 - Nuclear Waste Disposal (POF4-141)},
pid = {G:(DE-HGF)POF4-1411},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34293259},
UT = {WOS:000682991300073},
doi = {10.1021/acs.inorgchem.1c01562},
url = {https://juser.fz-juelich.de/record/904125},
}