Notizen: Ternäre Fluoride vom Typ AgLnF4 (Ln = Nd, Sm-Lu, Y) / Ternary Fluorides of the AgLnF4-Type (Ln = Nd, Sm-Lu, Y)

Abstract

Single crystals of AgGdF4 have been investigated by X-ray methods. AgGdF4 is hexagonal (isostructural to NaNdF4) with a = 6.233, c = 3.599 Å, Z, = 3/2. Guinierphotographs give the same structure for AgLnF4-compounds with Ln = Nd, Sm-Ho. The other five (Ln = Er-Lu, Y) crystallize trigonal (isostructural to KErF4) in a superstructure variant of the CaF2-type (Z = 18).