Premium
Phase formation in molten system (Na/K) 2 O‐TiO 2 ‐P 2 O 5 . Crystal structures of NASICON and langbeinite‐related phosphates (K/Na) 1+x Ti 2 (PO 4 ) 3 (x = 0 and 0.357)
Author(s) -
Strutynska Nataliia,
Bondarenko Marina,
Slobodyanik Nikolay,
Baumer Vyacheslav,
Zatovsky Igor,
Bychkov Kostyantin,
Puzan Anna
Publication year - 2016
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201600207
Subject(s) - crystallization , fourier transform infrared spectroscopy , crystallography , x ray crystallography , crystal structure , fast ion conductor , analytical chemistry (journal) , phase (matter) , chemistry , infrared spectroscopy , atmospheric temperature range , metal , spectroscopy , crystal (programming language) , diffraction , mineralogy , materials science , electrolyte , chemical engineering , physics , organic chemistry , optics , electrode , chromatography , quantum mechanics , meteorology , engineering , programming language , computer science
Crystallization of high temperature self‐flux of system Na 2 O‐K 2 O‐TiO 2 ‐P 2 O 5 was investigated at different molar ratios (Na+K)/P = 0.9; 1.0 or 1.2 and Na/K = 1.0 or 2.0 over the temperature range 1000–650°C. The conditions of formation of complex phosphates K 0.10 Na 0.90 Ti 2 (PO 4 ) 3 (NASICON‐related) and K 0.877 Na 0.48 Ti ІІІ 0.357 Ti ІV 1.643 (PO 4 ) 3 (langbeinite‐related) have been established. The new obtained compounds were investigated using FTIR‐spectroscopy, powder and single crystal X‐ray diffraction and optical microscopy methods. The influence of alkaline metal nature on the structure formation of complex phosphates in the high temperature self‐fluxes is discussed.