Abstract: | Crystal Structure of Ni4Nb2O9 Single crystals of Ni4Nb2O9 were prepared and examined by X-ray work (space group C –Fd2d; a = 10.101(13), b = 17.5126(51), c = 28.6364(87) Å; Z = 32). Ni4Nb2O9 has 480 atoms per unit cell, thus forming a complicated threedimensional NiO6-octahedra framework. NbO6-double octahedra are deposited in this framework. The relations to other A4B2O9 compounds are discussed. |