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shell n m
where n is the number of core-shell units and m is an interger specifying which shell model is requires.

m=1 for adiabatic shell
m = 2 for relaxed shell

Each of the subsequent n records contains:

index 1   integer    site index of core
index 2  integer    site index of shell
k         real                         force constant of core-shell spring
k4       real                         quartic (anharmonic) force constant of spring

[ Last edited by cenwanglai on 2013-11-16 at 17:46 ]
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