Aperiodicity, structure, and dynamics in Ni(CN)(2)

作者：Goodwin Andrew L^*; Dove Martin T; Chippindale Ann M; Hibble Simon J; Pohl Alexander H; Hannon Alex C

来源：Physical Review B, 2009, 80(5): 054101.

DOI：10.1103/PhysRevB.80.054101

• bond lengths
• long-range order
• Monte Carlo methods
• neutron diffraction
• nickel compounds
• space groups
• thermal expansion
• vibrational modes
• X-ray diffraction

By combining the results of both x-ray diffraction and neutron total-scattering experiments, we show that Ni(CN)(2) exhibits long-range structural order only in two dimensions, with no true periodicity perpendicular to its gridlike layers. Reverse Monte Carlo analysis gives an experimental distinction between M-C and M-N bond lengths in a homometallic cyanide framework and identifies the vibrational modes responsible for anomalous positive and negative thermal expansion in the title compound.

• 出版日期2009-8