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@ARTICLE{Zougrou:301503,
author = {Zougrou, Ioanna-Maria and Katsikini, M. and Brzhezinskaya,
M. and Pinakidou, F. and Papadopoulou, L. and Tsoukala, E.
and Paloura, Eleni},
title = {{C}a $\mathrm{{L}_{2,3}}$-{E}dge {XANES} and {S}r
{K}-{E}dge {EXAFS} {S}tudy of {H}ydroxyapatite and {F}ossil
{B}one {A}patite},
journal = {The Science of nature},
volume = {103},
number = {7-8},
issn = {0028-1042},
address = {Berlin},
publisher = {Springer8173},
reportid = {PUBDB-2016-02712},
pages = {60},
year = {2016},
note = {(c) Springer-Verlag Berlin Heidelberg},
abstract = {Upon burial, the organic and inorganic components of hard
tissues such as bone, teeth, and tusks are subjected to
various alterations as a result of interactions with the
chemical milieu of soil, groundwater, and presence of
microorganisms. In this study, simulation of the Ca
L$_{2,3}$-edge X-ray absorption near edge structure (XANES)
spectrum of hydroxyapatite, using the CTM4XAS code, reveals
that the different symmetry of the two nonequivalent
Ca$_{(1)}$ and Ca${(2)}$ sites in the unit cell gives rise
to specific spectral features. Moreover, Ca L$_{2,3}$-edge
XANES spectroscopy is applied in order to assess variations
in fossil bone apatite crystallinity due to heavy bacterial
alteration and catastrophic mineral dissolution, compared to
well-preserved fossil apatite, fresh bone, and geologic
apatite reference samples. Fossilization-induced chemical
alterations are investigated by means of Ca L$_{2,3}$-edge
XANES and scanning electron microscopy (SEM) and are related
to histological evaluation using optical microscopy images.
Finally, the variations in the bonding environment of Sr and
its preference for substitution in the Ca$_{(1)}$ or
Ca$_{(2)}$ sites upon increasing the Sr/Ca ratio is assessed
by Sr K-edge extended X-ray absorption fine structure
(EXAFS) spectroscopy.},
cin = {DOOR},
ddc = {500},
cid = {I:(DE-H253)HAS-User-20120731},
pnm = {899 - ohne Topic (POF3-899) / CALIPSO - Coordinated Access
to Lightsources to Promote Standards and Optimization
(312284) / ELISA - European Light Sources Activities -
Synchrotrons and Free Electron Lasers (226716)},
pid = {G:(DE-HGF)POF3-899 / G:(EU-Grant)312284 /
G:(EU-Grant)226716},
experiment = {EXP:(DE-H253)D-C-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000382121200011},
pubmed = {pmid:27379398},
doi = {10.1007/s00114-016-1383-y},
url = {https://bib-pubdb1.desy.de/record/301503},
}