involving particles with multiple types of atoms have the same analytical form as that for particles consisting of just single type of atoms(66)(7)with parameters Apa and ??pa for silica particles given by(8)(9)The cross-term LJ parameters in eqs 8 and 9 obey the Lorentz???Berthelot rules except for ??Si???eO,fO = 0.153 nm, ??Si???CH2 = 0, ??Si???CH3 = 0, ??Si???eO,fO/kB = 13280 K.(26) The bottom