ISOTHERMAL EQUATIONS OF STATE OF LLM‐105

2,6‐diamino‐3,5‐dinitropyrazine‐1‐oxide (LLM‐105) is an energetic ingredient that has an impact sensitivity close to that of TATB, yet a calculated energy content close to HMX. Reported tests of formulated LLM‐105 reveal that it is a good candidate for a new insensitive high‐performance explosive. As use of LLM‐105 increases, thermodynamic parameters and phase stability will need to be determined for accurate modeling. In order to accomplish this goal, isothermal equations of state of LLM‐105 at static high‐pressure and temperature were investigated using synchrotron angle‐dispersive x‐ray diffraction experiments. The samples were compressed and heated using diamond anvil cells. Pressure—volume data for LLM‐105 at ambient temperature and 100° C were fit to the Birch‐Murnaghan formalism to obtain isothermal equations of state. Temperature—volume data at ambient pressure were fit to obtain the volume thermal expansion coefficient.