Open AccessСтруктурные и спектральные характеристики ортоборатов Pr-=SUB=-1-x-=/SUB=-Lu-=SUB=-x-=/SUB=-BO-=SUB=-3-=/SUB=-
Author(s) -
С.З. Шмурак,
В.В. Кедров,
А.П. Киселев,
Т.Н. Фурсова,
И.И. Зверькова
Publication year - 2022
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2022.04.52188.265
Subject(s) - vaterite , calcite , aragonite , praseodymium , europium , lutetium , phase (matter) , luminescence , analytical chemistry (journal) , crystallography , ion , chemistry , materials science , mineralogy , inorganic chemistry , oxide , metallurgy , optoelectronics , organic chemistry , chromatography , yttrium
The structure, IR absorption and luminescence spectra of Pr0.99xLuxEu0.01BO3 orthoborates synthesized at 970°C were studied at 0 ≤ x ≤ 0.99. An increase in the concentration of lutetium leads to a sequential change of the structural state of the orthoborates. At first, the orthoborates are single-phase and have an aragonite structure (0 ≤ x ≤ 0.1). Then, they become two-phase and contain the aragonite and vaterite phases (0.1 < x < 0.6). With a further increase in х (0.6 < x ≤ 0.8), the compounds are single-phase with a vaterite structure, then they contain the vaterite and calcite phases (0.8 < x ≤ 0.95), and, finally, they become single-phase with a calcite structure (0.95 < x ≤ 0.99). An unambiguous correspondence between the structural modification and IR spectra of these compounds was established. It is shown that the emission of Eu3 + ions is observed in samples where the concentration of europium exceeds that of praseodymium.