****
GULP
****
.. py:class:: GULP
This interface supports energy and gradient evaluations with the
`GULP `_ molecular mechanics package
(version 5.2 or later)
A GULP :ref:`Theory ` object can be specified as follows::
my_frag = Fragment(coords='...')
my_theory = GULP(frag=my_frag,
ff='...',
...)
which would then be called as ``theory=my_theory`` in subsequent tasks.
General options
===============
.. py:attribute:: molecule
(default: ``False``) Use molecular forcefield rules
.. py:attribute:: conjugate
(default: ``True``) Use conjugate gradients minimiser for shell relaxation