Rare-earth intermediate phases with zinc

Sc11Ir4, Sc11Os4, Sc11Ru4 and Zr11Os4 with a new cubic structure type described by means of a cluster concept

“…The atomic coordination numbers were evaluated by the gap criterion for the distribution of distances (Bruzzone, Fornasini & Merlo, 1970;Brunner & Schwarzenbach, 1971). The distribution around one atom was obtained by plotting the number of surrounding atoms at a distance d against the ratio d/~ r, where r is equal to the sum of the metallic radii of the central atom and each of its surrounding atoms (rsc = 1.62, rir = 1.36 and ros = 1.35 A).…”

The Crystal Structure of GdZn3

“…2). This polyhedron has no analogs within Gd x Zn y structures, though the coordination number is between minimal 14 in the Gd-rich phase GdZn [3] and maximal 20 in the Zn-richer phases Gd 3 Zn 11 [1,2], Gd 3 Zn 22 [1,2] and GdZn 12 [1,2,10]. Two types of polyhedra are observed for the Zn atoms.…”

“…The binary system Gd-Zn is rich in intermetallic phases, especially in the region with high content of Zn [1,2]. Ten binary compounds (with the structure types (ST) in parentheses) with the compositions: GdZn (ST CsCl) [3], GdZn 2 [1,2,10] have been reported.…”

“…Ten binary compounds (with the structure types (ST) in parentheses) with the compositions: GdZn (ST CsCl) [3], GdZn 2 [1,2,10] have been reported. They have mostly been characterized thermodynamically as part of temperaturecomposition diagram constructions [2].…”

“…The structure modification can be achieved either by temperature treatment, a slight shift in composition or small admixtures of a third component. The existence of a binary compound GdZn 3 was reported, and it was stated that it adopts the YZn 3 structure type [1,2,5], however, only cell constants have been refined by means of powder X-ray diffraction, and no structure determination was performed. Moreover, it was found that CeZn 3 has a slightly different structure with space group Cmcm [1].…”