Transformation of hydrazinium azide to molecular N8 at 40 GPa
- Washington State Univ., Pullman, WA (United States)
- Washington State Univ., Pullman, WA (United States); Univ. of Chicago, IL (United States)
- Sogang Univ., Seoul (South Korea)
Hydrazinium azide (HA) has been investigated at high pressures to 68 GPa using confocal micro-Raman spectroscopy and synchrotron powder x-ray diffraction. The results show that HA undergoes structural phase transitions from solid HA-I to HA-II at 13 GPa, associated with the strengthening of hydrogen bonding, and then to N8 at 40 GPa. The transformation of HA to recently predicted N8 (N≡N+—N–—N=N—–N—+N≡N) is evident by the emergence of new peaks at 2384 cm–1, 1665 cm–1, and 1165 cm–1, arising from the terminal N≡N stretching, the central N=N stretching, and the N—N stretching, respectively. Furthermore, upon decompression, N8 decomposes to ε-N2 below 25 GPa, but the remnant can be seen as low as 3 GPa.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- National Research Foundation; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0001974
- OSTI ID:
- 1432864
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 13 Vol. 148; ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Beyond molecular nitrogen: revelation of two ambient-pressure metastable single- and double-bonded nitrogen allotropes built from three-membered rings
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journal | January 2019 |
Nanosecond-pulsed spark discharge plasma in liquid nitrogen: synthesis of polynitrogen from NaN 3
|
journal | August 2019 |
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