Table 1. Formation Enthalpy at 1 atm and Decomposing Energy Density with and without Oxidant.

name	P6122	P212121	Pnan	P21/c	P21	P21/m	C2c
formation enthalpy at 1 atm (eV/unit)	–0.13	–0.05	–0.05	–0.06	0.38	0.57	0.51
decomposed energy without oxidant (kJ/g)	0.52	0.61	0.61	0.61	1.15	1.38	1.31
decomposed energy with oxidant (kJ/g)	3.68	3.78	3.78	3.78	4.31	4.55	4.48