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Title: Cationic coordination compound Cs{sub 2}Hg{sub 3}I{sub 8} for IR NLO material: Synthesis, crystal growth and characterizations

Single crystals Cs{sub 2}Hg{sub 3}I{sub 8} of dimensions 5 × 3 × 4   mm{sup 3} were grown by solution growth method at room temperature and structurally characterized by single crystal X – ray diffraction. Cs{sub 2}Hg{sub 3}I{sub 8} compound crystallizes in a noncentrosymmetric space group Cm with the crystal data of a = 7.4415 Å, b = 21.6629 Å, c = 7.6726 Å, α, β = 90°, γ = 108.05° and Z = 2. The grown crystals were characterized by powder X – ray diffraction analysis and the various diffraction planes are indexed. The presence of functional groups was identified qualitatively by Fourier transform infrared and FT – Raman spectral analyses. Ultraviolet – visible spectral analyses shows that the crystal has low UV cut off at 388 nm combined with very good transparency of 98 % in a wide range. The optical band gap was estimated to be 3 eV. Mechanical hardness of the grown crystal Cs{sub 2}Hg{sub 3}I{sub 8} was determined. The dielectric response of the crystal with varying frequencies was studied. Differential scanning calorimetry (DSC) analysis shows that the grown crystal has very good thermal stability up to 97.5°C.
Authors:
; ;  [1]
  1. Crystal Growth Laboratory, PG & Research Department of Physics, Periyar EVR College (Autonomous) Tiruchirappalli – 620023 (India)
Publication Date:
OSTI Identifier:
22490483
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CALORIMETRY; CRYSTAL GROWTH; DIELECTRIC MATERIALS; DIFFERENTIAL THERMAL ANALYSIS; EV RANGE; FOURIER TRANSFORMATION; FREQUENCY DEPENDENCE; HARDNESS; INFRARED SPECTRA; LATTICE PARAMETERS; MONOCRYSTALS; OPACITY; PHASE STABILITY; POWDERS; RAMAN SPECTROSCOPY; SYNTHESIS; ULTRAVIOLET RADIATION; X-RAY DIFFRACTION