A high-pressure structural study of potassium dinitramide

Chan Qi Feng^{1, 2}, Craig L. Bull^{1, 2}, Nicholas P. Funnell², Christopher J. Ridley², Carole A. Morrison¹, Cameron J. G. Wilson¹, Angela Fong¹, Colin R. Pulham¹

¹ University of Edinburgh, Edinburgh, United Kingdom
² ISIS Facility, Rutherford Appleton Laboratory, Didcot, United Kingdom

Abstract. This paper reports the effects of elevated pressures on the crystal structure of potassium dinitramide â an energetic material that is a precursor for ammonium dinitramide and which has been considered as an oxidiser in its own right. The smooth variation in unit-cell parameters provided no evidence for a phase transition up to ~10.5 GPa. The variation in unit-cell volume was fitted to a 3rd order Birch-Murnaghan equation of state.

Keywords: KDN; high pressures; phase transition; single-crystal X-ray crystallography

ID: 65, Contact: Aaron Chan, s1685643@ed.ac.uk

NTREM 2024