| Abstract: | Metal-rich Gadolinium Hydride Halides Preparation, structures, and thermal behaviour of gadolinium hydride halides GdXHn (X = Cl, Br, I; 0.7 < n < 0.9) are described. The preparation is done by heating Gd, GdH2, and GdX3 in sealed Ta ampoules to 900°C and 950°C. The arrangement of the heavy atoms corresponds to the 3 slab (X? Gd? Gd? X) structures of ZrCl and ZrBr. Besides these, a new stacking variant containing only 2 slabs in the identity period (2s-GdBrH0·69 and 2s-GdIH0·80; nomenclature of niobium dichalcogenides) is found. |
