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X-ray crystal structure of synthetic REEAl2.07(B4O10)O0.60 (REE=(La,Ce); Ce; Nd) dimetaborates (Articolo in rivista)
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- X-ray crystal structure of synthetic REEAl2.07(B4O10)O0.60 (REE=(La,Ce); Ce; Nd) dimetaborates (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1524/zkri.2009.1175 (literal)
- Alternative label
Capitelli F.*, Chita G.*, Leonyuk N.I.**, Koporulina E.V.**, Bellatreccia F***., Della Ventura G.*** (2009)
X-ray crystal structure of synthetic REEAl2.07(B4O10)O0.60 (REE=(La,Ce); Ce; Nd) dimetaborates
in Zeitschrift für Kristallographie
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Capitelli F.*, Chita G.*, Leonyuk N.I.**, Koporulina E.V.**, Bellatreccia F***., Della Ventura G.*** (literal)
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- ISI Web of Science (WOS) (literal)
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- *CNR-Istituto di Cristallografia, Sede di Bari
**Dept. of Crystallography and Crystallochemistry, Moscow State University, Russia
***Geological Sciences Dept., Roma Tre University (literal)
- Titolo
- X-ray crystal structure of synthetic REEAl2.07(B4O10)O0.60 (REE=(La,Ce); Ce; Nd) dimetaborates (literal)
- Abstract
- Nonstoichiometric REEAL2.07(B4O10)O 0.60 (REE = (La, Ce); Ce; Nd) dimetaborates have been crystallized and analyzed by means of single crystal X-ray diffraction. The compounds resulted to be isostructural within hexagonal space group P62m (n. 189), with the following unit cell parameters: a = 4.6060(6) A, c = 9.3510(8) Å and V = 171.81(3)Å3 (La, Ce); a = 4.5960(6) Å c = 9.3170(10) A and V= 170.44(4) Å3 (Ce); a = 4.5830(7) Å, c = 9.2810(14) Å and V = 168.82(4) Å3 (Nd). The REE cations are surrounded by six oxygen atoms, making up a trigonal prismatic coordination; A1 cation is surrounded by five oxygen atoms, resembling a square pyramidal coordination, while the BO4 group displays tetrahedral arrangement. The three-dimensional framework can be described as a mica-like structure packed down crystallographic axis c, with layers of sixmembered rings of B tetrahedra alternated by inter-layers REE cations and layers of Al polyhedra. A complex network of REE... O and Al... O interactions concur to stabilize the framework. (literal)
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