Crystal Growth, Optical Spectra and Thermal Properties of Na₂Ni(SO₄)₂·4H₂O Crystal

Abstract:

Na₂Ni(SO₄)₂·4H₂O crystal (NNSH) size up to 12mm×10mm×8mm have been grown by heating the solution gradually. The structure of crystal was determined by X-ray diffraction method. The transmission spectra with strong absortpion band at visible and infrared region were measured by using UV-VIS ultraviolet spectrophotometer. Absorption cross-sections of crystal at 344nm and 640nm were evaluated as 4.380×10^-18cm² and 3.63×10^-18cm^-2,respectively. NNSH was stable at high temperature, for the dehydration temperature of the crystal was determined to be 132.6 °C by thermogravimetric measurement. It was shown that NNSH had strong absorption at visible or infrared region and high thermal stability that may render it to be a filter material as to obtain more pure ultra-violet spectrograph and be accessible in high temperature environment.

• Periodical: Advanced Materials Research (Volume 216)
• Pages: 312-315
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.216.312
• Online since: March 2011
• Authors: Rong Rong Zhuang, Yi Zong He, Yu Hong Fang
• Keywords: Absorption Cross Section, Na₂Ni(SO₄)₂•4H₂O Crystal, Optical Material, Thermal Stability, Transmission Spectrum

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