Two new phosphate langbeinites, Rb2YbTi(PO4)(3) and Rb2Yb0.32Ti1.68(PO4)(3) investigated at 293 and 150 K
Artikel i vetenskaplig tidskrift, 2005

The rubidium ytterbium titanium phosphates Rb2YbTi(PO4)(3), ( I), and Rb(2)Yb(0.3)2Ti(1.68)(PO4)(3), (II), have been structurally characterized from X-ray data collected at both 293 and 150 K. Compound ( II) is blue owing to the presence of mixed-valence titanium (41% Ti3+ + 59% Ti4+). Both (I) and (II) belong to the langbeinite structure type, with mixed Yb/Ti populations in the two crystallographically independent octahedral sites ( of symmetry 3). Ytterbium favours one of these sites, where about two-thirds of the Yb atoms are found. The O-atom displacement parameters are large in both compounds at both temperatures.

X-Ray Diffraction

Phase Transition

Structural Characterization

Crystal Structure

Författare

Joacim Gustafsson

Chalmers, Kemi- och bioteknik, Oorganisk kemi

Stefan Norberg

Chalmers, Kemi- och bioteknik, Oorganisk kemi

Göran Svensson

Chalmers, Kemi- och bioteknik, Oorganisk kemi

Jörgen Albertsson

Chalmers, Kemi- och bioteknik, Oorganisk kemi

Acta Crystallographica Section C: Crystal Structure Communications

0108-2701 (ISSN) 1600-5759 (eISSN)

Vol. 61 i9-i13

Ämneskategorier

Oorganisk kemi