Premium
Crystallization Pathways of Cerium(IV) Phosphates Under Hydrothermal Conditions: A Search for New Phases with a Tunnel Structure
Author(s) -
Shekunova Taisiya O.,
Istomin Sergey Ya.,
Mironov Andrey V.,
Baranchikov Alexander E.,
Yapryntsev Alexey D.,
Galstyan Arsen A.,
Simonenko Nikolay P.,
Gippius Andrey A.,
Zhurenko Sergey V.,
Shatalova Tatyana B.,
Skogareva Lyudmila S.,
Ivanov Vladimir K.
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201801182
Subject(s) - chemistry , crystallization , isostructural , cerium , hydrothermal synthesis , hydrothermal circulation , crystal structure , ceric ammonium nitrate , phosphate , amorphous solid , ammonia , inorganic chemistry , crystallography , nuclear chemistry , chemical engineering , polymer , organic chemistry , grafting , engineering
Hydrothermal crystallization pathways of amorphous ceric phosphate gels were found to be determined by the ammonia concentration in a reaction medium. This allows for highly selective hydrothermal synthesis of various finely crystalline ceric phosphates, including Ce(PO 4 )(HPO 4 ) 0.5 (H 2 O) 0.5 , (NH 4 ) 2 Ce(PO 4 ) 2 (H 2 O), and previously unknown NH 4 Ce 2 (PO 4 ) 3 . The structure of the latter compound was solved from powder X‐ray diffraction data. It appeared to be isostructural to ammonium thorium phosphate, NH 4 Th 2 (PO 4 ) 3 ; in this crystal structure, large channels (5.07 × 3.79 Å) located along the c ‐axis are occupied by NH 4 + ions.