I read from manu

For style real, these are the units:

mass = grams/mole

distance = Angstroms

time = femtoseconds

energy = Kcal/mole

velocity = Angstroms/femtosecond

force = Kcal/mole-Angstrom

temperature = degrees K

pressure = atmospheres

viscosity = Poise

charge = multiple of electron charge (+1.0 is a proton)

dipole = charge*Angstroms

electric field = volts/Angstrom

But I don��t know the mean of ��pressure = atmospheres��?

As far as I know, if real units used, units of per-atom stress by output from ��compute stress/atom command�� is in virial stress. It is also really a stress-volume formulation, meaning the computed quantity is in units of pressure-volume. It would need to be divided by a per-atom volume to have units of stress (pressure).

What is the units of the output virial stress in terms of (Angstrom, grams, femtosecons, etc.)?

Then I can get the real stress by divided by per-atom volume (Angstrom^{3}).

Thank you.

Yang