Synthesis and nonstoichiometry of the zirconium trihalides

Dirac fermions and superconductivity in the two-dimensional transition metals MOH(M=Zr,Hf)

“…Here, we report an investigation of the influence of surface termination in transition metal halide MX (M=Zr, Hf; X=Cl, Br) monolayers on their topological nature and propose a method for creating new topological Dirac SC from these monolayers, based on the quantitative first-principles calculations and symmetry analysis. Layered compounds ZrCl and ZrBr, consisting of tightly bound double hexagonal Zr atomic layers sandwiched between two halogen atomic layers, have been synthesized in experiment [17][18][19]. More excitingly, L. Zhou et al have predicted that MX monolayers constitute a novel family of robust Quantum spin Hall (QSH) insulator [20].…”

Synthesis and characterization of some binary and ternary zirconium iodides

“…Synthesis. The use of sealed tantalum tubing as a reaction vessel for high temperature reactions involving lower halides of zirconium has proven very successful (9,17,23,24,26), and this approach was continued. A temperature zone < 775OC (750°C) is necessary to allow separation of any ZrI formed from a-Zr12.…”

“…However, the most direct evidence for the change in bonding is also the most striking, a lengthening of the metal-metal distance across the shared face from 3.134 (4) ( Z r ) to 4.052 (9) g ' (Y), a 22.6% increase. In one sense the magnitude of .the contraction in the M-M distances seems very remarkable since it is 0.2 8 greater than that accompanying .…”

“…b -1 3~ -~r l 133.48(9) ( a d j a c e n t c l u s t e r ) The Zr6114 cluster (crystal 2) with the zirconium atoms connected by heavy lines. There is an inversion center at the center of the cluster and a mirror plane arallel to the B paper which contains zirconium atoms 2a and 2 and iodine atoms 4d and 48.…”

Synthesis and characterization of octahedral zirconium iodide clusters containing interstitial atoms

“…(3). If the occupancy was held at 1.0» the B refined to 2.2(2).The average 0 of the zirconiums was about 1.5 and the range of B's from other Interstitials where the occupancy was held at unity Is 0.2 to 1.4.An attempt to refine this position as fully occupied carbon led to a B of 0.069* even after rewelghting, and this has been Interpreted as unreason able, especially when the bond distances obtained from this structure were considered.…”