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Title: High-pressure structural response of an insensitive energetic crystal: Dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate (TKX-50)

Journal Article · · Journal of Physical Chemistry. C

The structural response of a novel, insensitive energetic crystal—dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate (TKX-50)—was examined under high pressure. Using synchrotron single-crystal X-ray diffraction measurements, details of molecular, intermolecular, and crystal changes were determined to ~10 GPa to understand its structural stability. The experimental results showed that TKX-50 exhibits highly anisotropic compression and significantly lower volume compressibility than currently known energetic crystals. These results are found to be in general agreement with our previous predictions from the DFT calculations. Additionally, the experimental data revealed anomalous compression—an expansion of the unit cell along the a axis (negative linear compressibility, NLC) upon compression to ~3 GPa. The structural analyses demonstrated that this unusual effect, the first such observation in an energetic crystal, is a consequence of the highly anisotropic response of 3D motifs, comprised of two parallel anions [(C2N8O2)2–] linked with two cations [(NH3OH)+] through four strong hydrogen bonds. Finally, the present results demonstrate that the structural stability of TKX-50 is controlled by the strong and highly anisotropic intermolecular interactions, and these may contribute to its shock insensitivity.

Research Organization:
Washington State Univ., Pullman, WA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002007
OSTI ID:
1346981
Journal Information:
Journal of Physical Chemistry. C, Vol. 121, Issue 10; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (6)

Crystal structure transformation and step-by-step thermal decomposition behavior of dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate journal January 2017
High‐Pressure Characterization of High‐Performance Insensitive Energetic Materials: Dihydroxylammonium 5,5’‐Bis(3‐Nitro‐1,2,4‐Triazolate‐1 N ‐Oxide) (MAD‐X1) journal June 2019
1T/2H multi-phase MoS 2 heterostructures: synthesis, characterization and thermal catalysis decomposition of dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate journal January 2019
A comparative study of the structure, stability and energetic performance of 5,5′-bitetrazole-1,1′-diolate based energetic ionic salts: future high energy density materials journal January 2018
Stability of Dihydroxylammonium 5,5’‐Bistetrazole‐1,1’‐Diolate (TKX‐50) in Solvents journal May 2019
Fabrication of three-dimensional TKX-50 network-like nanostructures by liquid nitrogen-assisted spray freeze-drying method journal April 2019