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High-Pressure Structural Studies of CL-20

(2,4,6,8,10,12-hexanitrohexaazaisowurtzitane)

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Book cover Energetic Materials at Extreme Conditions

Part of the book series: Springer Theses ((Springer Theses))

Abstract

2,4,6,8,10,12-hexanitrohexaazaisowurtzitane (HNIW, more commonly known as CL-20 after the China Lake Research Facility, USA) was first synthesised in the late 1980s although the detailed synthetic procedure was only published in 1998. CL-20 is a polycyclic nitramine with six nitro groups bonded to an isowurtzitane cage. The low ratio of carbon atoms to nitramine moieties, combined with the inherent strain in the isowurtzitane cage and the increased density (with respect to its monocyclic analogue) have led to CL-20 being characterised as “the densest and most energetic explosive known.” It is not surprising therefore that a significant amount of research has been aimed at assessing its explosive performance, sensitivity and thermal properties. Furthermore spectroscopic and diffraction techniques have been used to explore the rich polymorphism of CL-20.

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Notes

  1. 1.

    Although the experimental values are within the limits of experimental error of each other, it is believed that the current study does indeed represent a smaller value of B0. However, it would be extremely desirable to obtain more compression data, particularly in the low pressure (0–1 GPa) regime, in order to increase the precision of this value.

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Authors and Affiliations

  1. EaStCHEM Research School of Chemistry, Centre for Science at Extreme Conditions, University of Edinburgh, West Mains Road, EH9 3JJ, Edinburgh, UK

    David I. A. Millar

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  1. David I. A. Millar
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Correspondence to David I. A. Millar .

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© 2012 Springer-Verlag Berlin Heidelberg

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Millar, D.I.A. (2012). High-Pressure Structural Studies of CL-20. In: Energetic Materials at Extreme Conditions. Springer Theses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-23132-2_4

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