Abstract
Hydrothermally prepared La2(SeO3)3 contains a three-dimensional network of LaO10 polyhedra [dav(La—O) = 2.622 (3) Å] and SeO3 pyramids [dav(Se—O) = 1.691 (3) Å]. One of the SeO3 pyramids is in a general position and the other has crystallographic m symmetry. There are pseudo-channels in the [010] direction which are probably associated with the SeIV lone pairs.
