The title compound belongs to monoclinic, space group C2/c with a = 5.2694(1), b = 12.6659(4), c = 19.4108(2) A,β= 91.504(2)°, V = 1295.06(5) A^3, Z = 4 and Dc= 5.599 g/cm^3. The structure of BaGd2(M...The title compound belongs to monoclinic, space group C2/c with a = 5.2694(1), b = 12.6659(4), c = 19.4108(2) A,β= 91.504(2)°, V = 1295.06(5) A^3, Z = 4 and Dc= 5.599 g/cm^3. The structure of BaGd2(MoO4)4 contains a MoO4 tetrahedron, a distorted GdO8 polyhedron, and Ba^2+ ions in a tenfold coordination. The GdO8 polyhedra are linked together through edge-sharing to give a two-dimensional Gd layer. The MoO4 tetrahedra connected to the Gd atoms are capped up and down the Gd layer through common oxygen apices, thus-forming a new Gd-Mo layer. Finally, the Gd-Mo layers are held together through bridging BaO10 polyhedra to form a three-dimensional framework. Since the Ba-μ3-O bond has a large average distance of 2.888 A, this structural characteristic will result in a cleavage along the (001) plane.展开更多
基金the National Natural Science Foundation of China (No. 60378031)Key Project of Science and Technology of Fujian Province (2001F004)
文摘The title compound belongs to monoclinic, space group C2/c with a = 5.2694(1), b = 12.6659(4), c = 19.4108(2) A,β= 91.504(2)°, V = 1295.06(5) A^3, Z = 4 and Dc= 5.599 g/cm^3. The structure of BaGd2(MoO4)4 contains a MoO4 tetrahedron, a distorted GdO8 polyhedron, and Ba^2+ ions in a tenfold coordination. The GdO8 polyhedra are linked together through edge-sharing to give a two-dimensional Gd layer. The MoO4 tetrahedra connected to the Gd atoms are capped up and down the Gd layer through common oxygen apices, thus-forming a new Gd-Mo layer. Finally, the Gd-Mo layers are held together through bridging BaO10 polyhedra to form a three-dimensional framework. Since the Ba-μ3-O bond has a large average distance of 2.888 A, this structural characteristic will result in a cleavage along the (001) plane.
基金supported by the National Natural Science Foundation of China(21407059,61308095)Science Development Project of Jilin Province,China(20130522071JH,20130102004JC,20140101160JC)~~