New phosphate langbeinites, K2 MTi(PO4)3 (M = Er, Yb or Y), and an alternative description of the langbeinite framework
Abstract
Three new synthetic langbeinite structures, K2ErTi(PO4)3, K2YbTi(PO4)3 and K2YTi(PO4)3, are presented as well as a reinvestigation of K2CrTi(PO4)3. An alternative approach for the description of cation cages in the langbeinite framework is given using [M 5 X 6O39] building units.
- Publication:
-
Acta Crystallographica Section B
- Pub Date:
- September 2002
- DOI:
- 10.1107/S0108768102013782FILE: /proj/ads/abstracts/
- Bibcode:
- 2002AcCrB..58..743N
- Keywords:
-
- alkali titanium phosphate structures;
- rare-earth structures;
- langbeinite;
- X-ray diffraction