DOIONLINE

DOIONLINE NO - IJASEAT-IRAJ-DOIONLNE-13776

Publish In
International Journal of Advances in Science, Engineering and Technology(IJASEAT)-IJASEAT
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Volume Issue
Issue
Volume-6, Issue-3, Spl. Iss-2  ( Sep, 2018 )
Paper Title
Redetermination of the Crystal Structure of Copper Selenite, Cu2SeO4
Author Name
Sakvarit Nitrathorn, Kittipong Chainok, Nongnuj Muangsin
Affilition
Department of Chemistry, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand Materials and Textiles Technology, Faculty of Science and Technology, Thammasat University, Khlong Luang, Pathum Thani, 12121, Thailand
Pages
51-53
Abstract
The title compound, copper selenite, Cu2SeO4, which was usually used as a catalyst of the Kjeldahlnitrogen determination1, was synthesized using a hydrothermal method at 443 K and its crystal structure was redetermined based on modern CMOS (complementary metal oxide silicon) data from single-crystal X-ray diffraction at room temperature. The title compound crystallizes in the cubic chiral space group P213 with a Flack parameter of 0.014 (7). The structure consists of {CuO5} square pyramids, {CuO5} trigonal bipyramids and {SeO3} trigonal pyramids sharing edges to build up a threedimensional network where the lone pairs of electrons on SeIV are accommodated in void regions in the structure, which correlated with the previously reported structure model synthesized by transport method at higher temperature (673-723 K)(Meunier &Bertaud, 19762).All atoms in the crystal structure were located with lattice parameters, fractional coordinates and absolute structure determined to a much higher precision. The proposed structural model was validated by bond-valencesum calculations. Keywords: Crystal structure, Copper(II), Metal oxide, Selenium, Selenite
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