Mf. Zumdick et al., SYNTHESES, CRYSTAL-STRUCTURE, AND PROPERTIES OF HF2NI2IN, HF2NI2SN, HF2CU2IN, AND HF2PD2IN WITH ORDERED ZR3AL2 TYPE-STRUCTURE, Zeitschrift fur anorganische und allgemeine Chemie, 624(2), 1998, pp. 251-256
Citations number
14
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur anorganische und allgemeine Chemie
Hf2Ni2In, Hf2Ni2Sn, Hf2Cu2In, and Hf2Pd2In were synthesized by reactin
g the elements in an are-melting furnace under argon and subsequent an
nealing at 970 K. They crystallize with an ordered Zr3Al2 type structu
re, space group P4(2)/mnm which was refined from single crystal X-ray
data for Hf2Ni2In (a = 713.9(1) pm, c = 660.4(2) pm, wR2 = 0.0665, 513
F-2 values) and Hf2Ni2Sn (a = 703.1(1) pm, c = 676.1(2) pm, wR2 = 0.0
423, 507 F-2 values) with 18 parameters for each refinement. The latti
ce constants for Hf2Cu2In and Hf2Pd2In are a = 715.5(1) pm, c = 677.0(
1) pm and a = 742.6(1) pm, c = 679.4(2) pm, respectively. The structur
es may be considered as an intergrowth of distorted CsCl- and AlB2-lik
e slabs. Magnetic susceptibility measurements indicate Pauli paramagne
tism for Hf2Ni2In and Hf2Ni2Sn, which is consistent with the metallic
conductivity observed for Hf2Ni2In. Sn-119 Mossbauer spectroscopy of H
f2Ni2Sn shows one signal with an isomer shift of delta = 1.59(1) mm/s
subjected to quadrupole splitting of Delta E-q = 0.81(1) mm/s.