2005
Lanthanoids
I 2800
30- 025
Chemical Vapor Transport and Crystal Structure of Rare-Earth Arsenates(V).
— Crystals of LnAsO4 (Ln: Sc, Y, La—Lu) and of selected solid solutions (e.g.
Pr0.5Nd0.5AsO4, La0.5Pr0.5AsO4, Er0.5Yb0.5AsO4) are prepared by endothermic chemical
transport with TeCl4 as transport agent (evacuated quartz tube,
1333—1353 → 1223—1263 K, temp. gradient 100—125 K). The gaseous phase of
the transport reaction is studied by mass spectrometry. Single crystal XRD data are
reported for LaAsO4 and NdAsO4 (both space group P21/n, Z = 4) and for HoAsO 4 and
ScAsO4 (space group I4 1/amd, Z = 4). — (SCHMIDT, M.; MUELLER, U.; GIL, R. C.;
MILKE, E.; BINNEWIES, M.; Z. Anorg. Allg. Chem. 631 (2005) 6-7, 1154-1162;
MPI Chem. Phys. fester Stoffe, D-01187 Dresden, Germany; Ger., Abstr. Eng.) —
Schramke