Ternary ordered Laves phases RENi4Cd

Tethering Metal Ions to Photocatalyst Particulate Surfaces by Bifunctional Molecular Linkers for Efficient Hydrogen Evolution

“…The crystal chemical details and physical properties of these compounds have been reviewed 1. In many cases, isotypic cadmium compounds with the same valence electron count have been observed 2…”

Dimorphism in the REPdZn series

“…In continuations of our systematic studies of equiatomic RETMg [18] and RETCd [19] compounds we have now investigated the REPdZn series in more detail. So far only powder X-ray diffraction data had been published for ZrNiAl type REPdZn (RE ¼ Ce, Pr, Sm, Gd, Dy, Er) [1] and single crystal data for LT-and HT-CePdZn [9], EuPdZn [7], and YbPdZn [3].…”

Dimorphic EuCu5Cd

“…This is one of the rare cadmium-rich examples [1]. Remarkable segregated Cd 4 tetrahedra have been observed in the rare earthrich series RE 4 T Cd, RE 23 T 7 Cd 4 [1], and in the new structure type La 15 Rh 5 Cd 2 [11].…”

“…All other sites were fully occupied within two standard deviations. In the subsequent cycles the two mixed occupancies were refined as least-squares variables, leading to the composition EuCu 4 for the investigated crystal. The data set of the HT-phase showed a hexagonal unit cell and the systematic extinctions were compatible with the rhombohedral space group R3m.…”

“…Nevertheless, these few cadmium compounds show particularly interesting cadmium substructures. Isolated cadmium atoms (that means no Cd-Cd bonding) occur in the ordered Laves phases RENi 4 Cd [4], in the solid solutions RE 16 Rh 11−x Cd x [5], in Pr 6 Fe 13 Cd [6], or in EuAuCd [7]. In copper-rich EuCu 9 Cd 2 [8] one observes the segregation of Cd 2 pairs with a Cd-Cd distance of 286 pm.…”