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Physico‐Chemical Properties of 1,3,5,7‐Tetranitro‐1,3,5,7‐Tetrazacyclooctane (HMX)
Author(s) -
Maycock J. N.,
Verneker V. R. Pai,
Rouch L. L.
Publication year - 1969
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19690350234
Subject(s) - conductance , energetics , crystal (programming language) , crystallite , thermal conduction , impurity , materials science , electrical resistance and conductance , chemistry , thermal decomposition , electrical resistivity and conductivity , discontinuity (linguistics) , chemical physics , thermodynamics , condensed matter physics , crystallography , physics , organic chemistry , computer science , composite material , programming language , mathematical analysis , mathematics , quantum mechanics
The dc electrical conductance of single crystal and pelleted β‐HMX and also polycrystalline δ‐HMX has been measured. These data clearly show a discontinuity at the β‐ to δ‐crystal transformation temperature. The conductance of δ‐HMX has been interpreted as being intrinsic and associated with the electronic excitation of the groups. The data for the δ‐polymorph can be interpreted in terms of impurity conduction processes associated with trapped decomposition products. The crystal and conformational changes as observed by conductance techniques agree very well with thermal data related to these changes. Similarly the energetics of the β‐conductance agree well with the optical energetics of the β‐form.