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Competing hydrostatic compression mechanisms in nickel cyanide

DOI: 10.1016/j.physb.2015.09.027 DOI Help

Authors: J. Adamson (University of Oxford) , T. C. Lucas (University of Birmingham) , A. B. Cairns (University of Oxford) , N. P. Funnell (University of Oxford) , M. G. Tucker (ISIS Facility) , A. K. Kleppe (Diamond Light Source) , J. A. Hriljac (University of Birmingham) , A. L. Goodwin (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physica B: Condensed Matter , VOL 479 , PAGES 35 - 40

State: Published (Approved)
Published: December 2015

Abstract: We use variable-pressure neutron and X-ray diffraction measurements to determine the uniaxial and bulk compressibilities of nickel(II) cyanide, Ni(CN)2. Whereas other layered molecular framework materials are known to exhibit negative area compressibility, we find that Ni(CN)2 does not. We attribute this difference to the existence of low-energy in-plane tilt modes that provide a pressure-activated mechanism for layer contraction. The experimental bulk modulus we measure is about four times lower than that reported elsewhere on the basis of density functional theory methods.

Journal Keywords: Compressibility Mechanisms; High-Pressure Crystallography; Negative Area Compressibility

Subject Areas: Physics

Instruments: I15-Extreme Conditions

Added On: 16/11/2015 16:07

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