70495-28-2Relevant academic research and scientific papers
Phase equilibria in Zr-Ni-Sb ternary system at 870 K
Romaka,Tkachuk,Stadnyk,Romaka
, p. 233 - 236 (2009/06/06)
The isothermal section of the phase diagram of the Zr-Ni-Sb ternary system at 870 K in the whole concentration range has been constructed by means of X-ray and metallographic analyses. Eight ternary intermetallic compounds Zr6NiSb2 (
Preparation and Crystal Structures of some Binary Pnictides of Scandium,Zirconium, and Hafnium: Sc5Bi3, ZrBi, α-HfSb, HfBi, HfBi2, and th e Compound Zr5Bi3X(1-x), Possibly Stabilized by an Impurity (X)
Haase, Martin G.,Block, Helga,Jeitschko, Wolfgang
, (2008/10/08)
The title compouds were prepared by reaction of the elemental components. Of these Sc5Bi3 is a new compound. Its orthorhombic β-Yb5Sb3 typecrystal structure was determined from single-crystal X-ray data: Pnma, a=1124.4(1) pm, b=888.6(1) pm, c=777.2(1) pm, R=0.024 for 1140 structure factors and 44 variable parameters. For the other compounds we have est ablished the crystal structures. ZrBi has ZrSb type structure with a noticeable homogeneity range. This structure type was also found for the low temperature (α) form of HfSb and for HfBi. For α-HfSb thisstructure was refined from single-crystal X-ray data: Cmcm, a=377.07(4) pm, b=1034.7(1) pm, c=1388.7(1) pm, R=0.043 for 432 F values and 22 var iables. HfBi2 has TiAs2 type structure: Pnnm, a=1014.2(2) pm, b=1563.9(3) pm, c=396.7(1) pm. The structure was refined from single-crystal data to a residual of R=0.074 for 1038 F values and 40 variables. In addition, a zirconium bismuthide, possibly stabilized by light impurity elementsX and crystallizing with the hexagonal Mo5Si3C(1-x) type structure, was observed: Zr5Bi3X(1-x), a=873.51(6) pm, c=599.08(5) pm. The positions o f the heavy atoms of this structure were refined from X-ray powder film data. Various aspects of impurity stabilization of intermetallics are discussed.
Stabilization of the new antimonide Zr2V6Sb9 by V-V and Sb-Sb bonding
Kleinke, Holger
, p. 1369 - 1375 (2007/10/03)
The metal-rich antimonide Zr2V6Sb9 has been prepared by arc-melting of stoichiometric mixtures of Zr, V, and VSb2. Zr2V6Sb9 is the first example of a ternary ordered (filled) variant of the unusual V15Sb18 structure type. In addition to strong metal-antimony bonding, the crystal structure is significantly stabilized by bonding V-V and Sb-Sb interactions, whereas the Zr atoms do not form short metal-metal bonds. Band structure calculations using the Extended Hueckel approximation reveal Zr2V6Sb9 being metallic, in agreement with the Pauli paramagnetism experimentally observed.
The new antimonides ZrNiSb and HfNiSb: Synthesis, structure, and properties in comparison to ZrCoSb and HfCoSb
Kleinke
, p. 1272 - 1278 (2008/10/09)
The antimonides ZrNiSb and HfNiSb were prepared by arc-melting of stoichiometric mixtures of Zr, ZrSb2 and Ni, and Hf, HfSb2 and Ni, respectively. Unlike ZrCoSb and HfCoSb, which form the LiAlSi structure type, ZrNiSb and HfNiSb crystallize in the TiNiSi type. The lattice dimensions are a = 672.7(2) pm, b = 416.43(8) pm, c = 753.8(1) pm, V = 211.16(7) × 106 pm3 for ZrNiSb and a = 662.3(5) pm, b = 413.3(3) pm, c = 746.8(8) pm, V = 204.4(3) × 106 pm3 for HfNiSb (space group Pnma). Whereas no Zr-Zr contacts a consequence of the different numbers of valence electrons. The structural differences come along with a drastic change in the electronic structure and in the physical properties: ZrNiSb exhibits metallic behavior, in contrast to the not conducting ZrCoSb.
SYNTHETIC AND STRUCTURAL STUDY OF THE ZIRCONIUM-ANTIMONY SYSTEM.
Garcia,Corbett
, p. 440 - 451 (2008/10/08)
Ten phases have been obtained in the Zr-Sb system using arc-melting, annealing, powder sintering, vapor-phase transport, vaporization, and metal flux methods. In addition to the previous reported compositions (and structure types), Zr//3Sb(Ni//3P), Zr//5Sb//3(Mn//5Si//3), and ZrSb//2(ZrSb//2), there also exist Zr//2Sb(La//2Sb), high temperature Zr//5Sb//3(Y//5Bi//3), ZrSb//1// minus //x(FeSi), ZrSb(ZrSb-Cmcm), and low temperature ZrSb//2// minus //x (PbCl//2). There are also phases of unknown structure near the Zr//2Sb composition at high temperatures and for Zr//2Sb//3 that are provisionally primitive orthorhombic and tetragonal, respectively. The Mn//5Si//3-type phase Zr//5Sb//3// plus //x is a true binary and nonstoichiometric over the ranges 0. 0 less than equivalent to x 0. 4. Guinier lattice constant data are reported for all the phases.
Chemistry of polar intermetallic compounds. Study of two Zr5Sb3 phases, hosts for a diverse interstitial chemistry
Garcia, Eduardo,Corbett, John D.
, p. 2353 - 2359 (2008/10/08)
A variety of synthesis routes, some phase properties, and two single-crystal X-ray studies have established something of the nature of the Zr-Sb system in the neighborhood of 65 atom % zirconium. Samples prepared by vapor-phase transport or by annealing either elemental powders or arc-melted products at 1000-1100°C yield the Mn5Si3 form of Zr5Sb3+x. This is a true binary phase that is nonstoichiometric over the range of 0.00 ≤ x ≤ 0.42. Study of a single crystal with x = 0.16 (1) from an arc-melted sample has established that the extra antimony in this structure is bonded in an interstitial site in the center of a chain of confacial zirconium octahedra (space group P63/mcm, Z = 2, a = 8.4267 (5) A?, c = 5.7856 (6) A?, R = 2.7%, Rw = 3.4%). Many other atoms may also be bound at this site. Binary Zr-Sb samples in the range 0 ≤ x ≤ ～0.2 melt incongruently to form the foregoing phase plus a second, new, high-temperature, stoichiometric form of Zr5Sb3 in the Y5Bi3 structure (space group Pnma, Z = 4, a = 7.465 (1) A?, b = 8.801 (1) A?, c = 10.865 (2) A?, R = 2.8%, Rw = 2.9%). The two structure types are further described and compared.
