ChemInform Abstract: THE MIXTURE NICKEL‐ZINC‐GERMANIUM (NIZNMGEM′)

Abstract

Zulegieren von Ge führt zu einer Ausweitung des Stabilitätsbereichs von NiZn.h(CsCl‐Typ) in Richtung tieferer Temp., da das Ge Valenzelektronen liefert, die sonst durch erhöhte Temp. aus den Ni‐Atomen angeregt werden müssen.

The First Ternary Phase in the Ga–Sn–Pd System: Synthesis, Crystal Structure, and Catalytic Properties of Ga2+x+ySn4–xPd9

“…Structural investigations of some of these so‐called η ‐phases showed that oxygen or carbon atoms partially occupy the octahedrally coordinated interstitial sites, whereas hydrogen and deuterium atoms mainly occupy the tetrahedral interstitial voids . In addition to the filled derivatives of Ti 2 Ni (borides, carbides, nitrides, and oxides), “pure” intermetallic phases exist (Zn 6 Ni 7 Ge 2 , CoMnSb),, in which the positions of the interstitial voids are occupied by metal atoms. The occupation variants of the voids in positions 16 d , 8 b , and 8 a in the crystal structures of other representatives of the Ti 2 Ni family are shown in Table S1.…”

Ordering and structural vacancies in non-stoichiometric Cu–Al γ brasses

“…There is only a small contraction of interatomic distances around these sites which are usually partially occupied [except for IT(B)I of alloy 7]. In this respect, and in the loss of cubic symmetry, the Cu-AI alloys 6 and 7 are quite distinct from the transition-metal defect y brasses NisCd4o, PtsCd4o, CusNiZn36 and PdsCd43 which are primitive cubic y brasses and have 4, 4, 3 and 1 vacant atom sites, respectively (Ljung & Westman, 1970;Arnberg, 1980;Sarah, Rajasekharan & Schubert, 1981). Ordering of the atoms in these phases takes various forms but in all cases the vacancies are confined wholly to the IT(A) sites, which in NisCd40 and PdsCd40 are fully vacant, accompanied by a partial collapse of cluster A.…”