Mineralomimetic cadmium cyanide benzene clathrate

1999 ◽  
Vol 40 (5) ◽  
pp. 721-725 ◽  
Author(s):  
T. Kitazawa ◽  
A. Nishimura
Keyword(s):  
Cadmium Cyanide ◽  
Benzene Clathrate

scholarly journals Spin-ice physics in cadmium cyanide

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chloe S. Coates ◽  
Mia Baise ◽  
Adrian Schmutzler ◽  
Arkadiy Simonov ◽  
Joshua W. Makepeace ◽  
...  
Keyword(s):  
Dipole Moments ◽  
Interaction Strength ◽  
Magnetic Interaction ◽  
Energy Scale ◽  
Spin Ice ◽  
Structural Behaviour ◽  
Geometric Frustration ◽  
Cadmium Cyanide ◽  
The Difference ◽  
Increased Strength

AbstractSpin-ices are frustrated magnets that support a particularly rich variety of emergent physics. Typically, it is the interplay of magnetic dipole interactions, spin anisotropy, and geometric frustration on the pyrochlore lattice that drives spin-ice formation. The relevant physics occurs at temperatures commensurate with the magnetic interaction strength, which for most systems is 1–5 K. Here, we show that non-magnetic cadmium cyanide, Cd(CN)2, exhibits analogous behaviour to magnetic spin-ices, but does so on a temperature scale that is nearly two orders of magnitude greater. The electric dipole moments of cyanide ions in Cd(CN)2 assume the role of magnetic pseudospins, with the difference in energy scale reflecting the increased strength of electric vs magnetic dipolar interactions. As a result, spin-ice physics influences the structural behaviour of Cd(CN)2 even at room temperature.

Notizen: Cyclophosphazenes as Novel Antitumour Agents: Geometry of the Hexaziridinocyclotriphosphazene, N3P3Az6, from an X-ray Investigation of the Benzene Clathrate

1980 ◽  
Vol 35 (6) ◽  
pp. 784-785 ◽  
Author(s):  
T. Stanley Cameron ◽  
Christine Chan
Keyword(s):  
X Ray ◽  
Antitumour Agents ◽  
Benzene Clathrate

Abstract Hexaziridinocyclotriphosphazene forms a 2:1 clathrate with benzene. The benzene makes a sandwich between the two phosphazene molecules with the planes of the rings parallel. The geminal aziridinyl groups have a most unusual eclipsed conformation.

scholarly journals Negative X-Ray Expansion in Cadmium Cyanide

2020 ◽  
Author(s):  
Chloe Coates ◽  
Claire A. Murray ◽  
Hanna Boström ◽  
Emily Reynolds ◽  
Andrew Goodwin
Keyword(s):  
Mechanical Response ◽  
Local Heating ◽  
Negative Thermal Expansion ◽  
Functional Materials ◽  
Temperature Phase ◽  
X Rays ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cadmium Cyanide ◽  
Temperature Phase Transition

Cadmium cyanide, Cd(CN)<sub>2</sub>, is a flexible coordination polymer best studied for its strong and isotropic negative thermal expansion (NTE) effect. Here we show that this NTE is actually X-ray exposure dependent: Cd(CN)<sub>2</sub> contracts not only on heating but also on irradiation by X-rays. This behaviour contrasts that observed in other beam-sensitive materials, for which X-ray exposure drives lattice expansion. We call this effect ‘negative X-ray expansion’ (NXE) and suggest its origin involves an interaction between X-rays and cyanide ‘flips’; in particular, we rule out local heating as a possible mechanism. Irradiation also affects the nature of a low-temperature phase transition. Our analysis resolves discrepancies in NTE coefficients reported previously on the basis of X-ray diffraction measurements, and we establish the ‘true’ NTE behaviour of Cd(CN)<sub>2</sub> across the temperature range 150–750 K. The interplay between irradiation and mechanical response in Cd(CN)<sub>2</sub> highlights the potential for exploiting X-ray exposure in the design of functional materials.

scholarly journals Ice-like disorder and phase transitions in cadmium cyanide

2018 ◽  
Vol 74 (a2) ◽  
pp. e53-e53
Author(s):  
Chloe Coates ◽  
Mia Baise ◽  
Arkadiy Simonov ◽  
Josh Makepeace ◽  
Andrew Seel ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Cadmium Cyanide
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