improper_style_cvff.txt
b93436e48b86lammm-devel

improper_style_cvff.txt
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			"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c

			:link(lws,http://lammps.sandia.gov)
			:link(ld,Manual.html)
			:link(lc,Section_commands.html#comm)

			:line

			improper_style cvff command :h3

			[Syntax:]

			improper_style cvff :pre

			[Examples:]

			improper_style cvff
			improper_coeff 1 80.0 -1 4 :pre

			[Description:]

			The {cvff} improper style uses the potential

			:c,image(Eqs/improper_cvff.jpg)

			where phi is the Wilson out-of-plane angle.

			The following coefficients must be defined for each improper type via the
			"improper_coeff"_improper_coeff.html command as in the example above, or in
			the data file or restart files read by the "read_data"_read_data.html
			or "read_restart"_read_restart.html commands:

			K (energy)
			d (+1 or -1)
			n (0,1,2,3,4,6) :ul

			[Restrictions:]

			Improper styles can only be set for atom styles that allow impropers to be
			defined.

			This improper style is part of the "molecular" package. It is only
			enabled if LAMMPS was built with that package. See the "Making
			LAMMPS"_Section_start.html#2_2 section for more info.

			[Related commands:]

			"improper_coeff"_improper_coeff.html

			[Default:] none