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- Title
Crystal structure of the europium(II) aluminate Eu<sub>3</sub>Al<sub>2</sub>O<sub>6</sub>.
- Authors
Niehaus, Oliver; Pöttgen, Rainer
- Abstract
Well-shaped single crystals of the europium(II) aluminate Eu3Al2O6 were obtained as a side product during a synthesis attempt for EuCdAl. The structure was refined from single crystal X-ray diffractometer data of a twinned specimen: Ca3Al2O6 type, P a 3 ¯ , $Pa\bar 3,$ a=1584.82(2) pm, wR=0.0570, 2034 F2 values, and 103 variables. All aluminium atoms in the Eu3Al2O6 structure show tetrahedral oxygen coordination, and the AlO4 tetrahedra (173–178 pm Al–O) are condensed via common corners to two-dimensional networks. The six crystallographically independent europium sites have coordination numbers 6, 7, 8, and 9, and their europium–oxygen polyhedra are linked with the AlO4 tetrahedra to a dense packing. Bond-valence calculations reveal two sets of differently bonded europium atoms.
- Subjects
EUROPIUM; ALUMINATES; X-ray diffractometers; DATA; ALUMINUM; OXYGEN
- Publication
Zeitschrift für Naturforschung B: A Journal of Chemical Sciences, 2015, Vol 70, Issue 2, p155
- ISSN
0932-0776
- Publication type
Article
- DOI
10.1515/znb-2014-0240