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Hydrothermal Synthesis and Crystal Structures of Na 2 Be 3 (SeO 3 ) 4 ·H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4
Author(s) -
Shen Chen,
Mei Dajiang,
Sun Chuanling,
Liu Yunsheng,
Wu Yuandong
Publication year - 2017
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201700078
Subject(s) - triclinic crystal system , crystallography , monoclinic crystal system , octahedron , crystal structure , trigonal crystal system , hydrothermal synthesis , infrared spectroscopy , hydrogen bond , chemistry , hydrothermal circulation , molecule , materials science , geology , organic chemistry , seismology
The selenites, Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 , were synthesized under hydrothermal conditions. The crystal structures of Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 were determined by single‐crystal X‐ray diffractions. Na 2 Be 3 (SeO 3 ) 4 · H 2 O crystallizes in the triclinic space group P 1 (no. 2) with unit cell parameters a = 4.8493(9), b = 12.013(2), c = 12.077(2) Å, and Z = 2, whereas Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 crystallizes in the monoclinic space group C 2/ m (no. 12) with lattice cell parameters a = 12.596(6), b = 7.297(4), c = 16.914(8) Å, and Z = 2. Na 2 Be 3 (SeO 3 ) 4 · H 2 O features a three‐dimensional open framework structure formed by BeO 4 tetrahedra and SeO 3 trigonal pyramids. Na cations and H 2 O molecules are located in different tunnels. Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 has a structure composed of isolated [Mg(H 2 O) 6 ] octahedra and SeO 3 trigonal pyramids interacted by hydrogen bonds, and Cs cations are resided in‐between. Both compounds were characterized by thermogravimetric analysis and FT‐IR spectroscopy.