The whitlockite-like crystal structure of Ca9Lu(PO4)7 when doped with several ions (Yb3+, Eu3+ and Pr3+) at different concentrations (1 mol.%, 5 mol.% and 10 mol.%) was studied, by means of synchrotron X-ray diffraction. In particular for Eu3+ and Pr3+, the presence of the dopant ion significantly changed the occupation factors (OF's) of the Ca2+ and Lu3+ cations and gave rise to a distortion of the metal-oxygen polyhedra. The observed structural features clearly showed significant impact of the dopant ion on the crystal structure of the host.
Structural study of Yb3+, Eu3+ and Pr3+ doped Ca9Lu(PO4)7
PICCINELLI, FABIO;BETTINELLI, Marco Giovanni
2015-01-01
Abstract
The whitlockite-like crystal structure of Ca9Lu(PO4)7 when doped with several ions (Yb3+, Eu3+ and Pr3+) at different concentrations (1 mol.%, 5 mol.% and 10 mol.%) was studied, by means of synchrotron X-ray diffraction. In particular for Eu3+ and Pr3+, the presence of the dopant ion significantly changed the occupation factors (OF's) of the Ca2+ and Lu3+ cations and gave rise to a distortion of the metal-oxygen polyhedra. The observed structural features clearly showed significant impact of the dopant ion on the crystal structure of the host.
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