Abstract
The crystal structure of Li2Na2NiP6O18·12H2O is characterized by the presence of six-membered P6O18 6− phosphate ring anions (internal symmetry -1) having a chair conformation and three different cations, viz. Li+, Na+ and Ni2+, to counterbalance the anionic charge. All atoms are in general positions except for nickel, which lies on a special position with site symmetry 2. Lithium has a tetrahedral environment (LiO4), and sodium and nickel have octahedral environments [NaO6 and Ni(H2O)6, respectively]. The P6O18 rings are linked via corner sharing by NaO6 octahedra and LiO4 tetrahedra to form a three-dimensional framework presenting tunnels running along [010] in which the six-coordinated Ni2+ cations are located. The structure is stabilized by a network of O—H⋯O hydrogen bonds.
Highlights
The crystal structure of Li2Na2NiP6O1812H2O is characterized by the presence of six-membered P6O186 phosphate ring anions having a chair conformation and three different cations, viz. Li+, Na+ and Ni2+, to counterbalance the anionic charge
All atoms are in general positions except for nickel, which lies on a special position with site symmetry 2
The P6O18 rings are linked via corner sharing by NaO6 octahedra and LiO4 tetrahedra to form a three-dimensional framework presenting tunnels running along [010] in which the six-coordinated Ni2+ cations are located
Summary
Min = 0.61 e Å3 a Laboratoire de Chimie des Matériaux, Faculté des Sciences de Bizerte, 7021. Zarzouna Bizerte, Tunisia, and bPetrochemical Research Chair, College of Science, King Saud University, Riyadh, Saudi Arabia. The crystal structure of Li2Na2NiP6O1812H2O is characterized by the presence of six-membered P6O186 phosphate ring anions (internal symmetry 1) having a chair conformation and three different cations, viz. Li+, Na+ and Ni2+, to counterbalance the anionic charge. Lithium has a tetrahedral environment (LiO4), and sodium and nickel have octahedral environments [NaO6 and Ni(H2O), respectively]. The P6O18 rings are linked via corner sharing by NaO6 octahedra and LiO4 tetrahedra to form a three-dimensional framework presenting tunnels running along [010] in which the six-coordinated Ni2+ cations are located.
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