Open AccessСтруктурные особенности твердых растворов Nd-=SUB=-x-=/SUB=-Gd-=SUB=-1-x-=/SUB=-Cr-=SUB=-3-=/SUB=-(BO-=SUB=-3-=/SUB=-)-=SUB=-4-=/SUB=-
Author(s) -
К. Н. Болдырев,
N. N. Kuzmin,
Elena Dobretsova
Publication year - 2021
Publication title -
optika i spektroskopiâ
Language(s) - English
Resource type - Journals
eISSN - 2782-6694
pISSN - 0030-4034
DOI - 10.21883/os.2021.01.50437.248-20
Subject(s) - neodymium , ion , crystallography , absorption spectroscopy , crystal structure , space group , analytical chemistry (journal) , crystal (programming language) , solid solution , absorption (acoustics) , materials science , chemistry , x ray crystallography , inorganic chemistry , physics , laser , optics , metallurgy , diffraction , programming language , organic chemistry , chromatography , computer science , composite material
Optical studies of NdxGd1-xCr3(BO3)4 0.01≤x≤1 crystals have been carried out. A significant concentration effect of the Nd3+ ion on the crystal structure of these solid solutions was identified. It was found from the absorption spectra of neodymium ions in the 4I9/2→11F3/2 transition region that at a concentration x>0.6 two nonequivalent Nd3+ centers appear, which is explained by the formation of two polytype modifications with space groups R32 and C2/c. At a concentration x<0.6, only one modification with the space group R32 is observed.