The Crystal Structure of the New REE–Te Oxychlorides: NdTe2O5Cl and GdTe2O5Cl

✍ Scribed by G.B. Nikiforov; A.M. Kusainova; P.S. Berdonosov; V.A. Dolgikh; P. Lightfoot

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 206 KB
• Volume: 146
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1999.8395

✦ Synopsis

The title compounds were synthesized and their crystal structures were determined by powder X-ray di4raction methods. Both phases are tetragonal and crystallize in space group P4/mmm, NdTe 2 O 5 Cl with cell constants a ‫؍‬ 4.0373(1), c ‫؍‬ 8.7912(3) A s , and GdTe 2 O 5 Cl a ‫؍‬ 3.9611(2), c ‫؍‬ 8.4043(8), Z ‫؍‬ 1. These oxychlorides adopt layered structures belonging to the family of Sillen phases and are built of alternating [LnTe 2 O ؉ 5 ] and [Cl ؊ ] layers (X 3 1 structure). Related structures and the nature of cation ordering in the metal+oxygen layers are discussed.