A structural variant to the NaErCl4/α-NiWO4 type for ternary rare-earth halides NaMCl4: Synthesis and crystal structure of NaLuCl4

Article abstract of DOI:10.1002/zaac.19966220506

Single crystals of NaLuCl₄ (orthorhombic, Pbcn (Nr. 60), Z = 4, a = 618.6(1) pm, b = 1592.2(2) pm, c = 657.0(1) pm) were grown for the first time from the binary components using the Bridgman technique. The crystal structure may be derived from a hexagonally closest packing of Cl^- spheres with one half of all octahedral sites occupied by the cations Na⁺ and Lu³⁺, respectively. The close relation of the structure to that of NaErCl₄ (α-NiWO₄) is discussed. NaScCl₄ was found to be isotypic to NaLuCl₄. Johann Ambrosius Barth 1996.