Phase Relations in the Nb-Ni-Sb System

Abstract

Phase relations in the Nb-Ni-Sb system at 1070 K are studied by x-ray diffraction. The results confirm the existence of the ternary compound Nb 28 Ni 33.5 Sb 12.5 (new structure type), which is shown to have a narrow homogeneity range. The system contains no solid solutions based on binary compounds, as evidenced by structural analysis data for NiSb and NbSb 2 in three-phase Nb-Ni-Sb samples.

Ambient and High Pressure CuNiSb2: Metal-Ordered and Metal-Disordered NiAs-Type Derivative Pnictides

“…The smaller Ni-Sb distance than the Cu-Sb bond distance implies that the electron localization environments of Ni-Sb and Cu-Sb are different, which will be further discussed in the electronic structure section. The Ni-Sb bond distance (2.6159 Å) is close to the reported value (2.6174 Å) of binary NiSb ( P 6 3 / mmc ), − but smaller than those (2.6750 Å, 2.7303 Å) in the disordered MnNiSb 2 and CrNiSb 2 ( P 6 3 / mmc ). , The Cu-Ni transition metal bond distances are 2.5668(1) Å, which are close to the Ni–Ni (2.575 Å) metal bonds observed in NiSb, but smaller than those in MnNiSb 2 (2.700 Å) and CrNiSb 2 (2.660 Å).…”

Hidden Weyl points in centrosymmetric paramagnetic metals

“…Atomic and electronic structure of AB 2 compounds 2.1. Atomic structure In the following, the atomic structure of TaAs 2 [22], TaSb 2 [23], NbSb 2 [24] and NbAs 2 [25] is described.…”

“…Each unit cell contains two formula units. The atoms are located at the general Wyckoff positions --x x y x x y , , and , , ( ) ( )for x y , ( ), as shown in table 2 [22,24]. Figure 1 shows the reduced unit cell and first BZ of TaAs 2 .…”

Low cost nano materials crystallize in the NiAs structure type as an alternative to the noble metals in the hydrogenation process

“…CoSb and NiSb crystallize in the NiAs structure type with the hexagonal space group P6 3 /mmc. 32 The transition metals and Sb occupy at the Ni and As atomic sites, respectively. The crystal structure of NiSb can be described as hcp arrangement of antimony atoms with the nickel atoms lling the octahedral voids.…”