Open AccessThe growth and optical properties of Bi12SiO20 single crystals
Author(s) -
V Aleksandar Golubovic,
N. Nikolić,
Radoš Gajić,
Stevan W. Djurić,
Andreja Valčić
Publication year - 2002
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc0204279g
Subject(s) - spectral line , diffraction , single crystal , crystal (programming language) , materials science , reflectivity , lattice (music) , growth rate , crystal growth , rotation (mathematics) , atmospheric temperature range , crystallography , range (aeronautics) , optics , analytical chemistry (journal) , chemistry , thermodynamics , physics , geometry , mathematics , composite material , chromatography , programming language , astronomy , computer science , acoustics
Single crystals of Bi12SiO20 were grown from the melt by the Czochralski technique. The critical crystal diameter dc=10 mm and the critical rate of rotation ?c=20 rpm were calculated by equations from the hydrodynamics of a melt. The rate of crystal growth was experimentally obtained to be 5 mm/h. The crystal growth was in the [111] direction. The lattice parameter a=1.0096nm was determined by X-ray powder diffraction. The reflectance spectra were recorded in the wave numbers range 20?5000 cm-1 at different temperatures. For all the recorded spectra the values of the vibrational TO and LO modes were found using the Kramers-Kronig analysis (KKA). Twentyfive TO and LO modes were found at 70 K, and eighteen at 295 K. The obtained results are discussed and compared with published data.