#
#  JACKSON library - collection of potentials
#
#  MEG Valerio , RA Jackson  and JF de Lima, J Phys Condens Matter
#  12 (2000) 7727 and references therein.
#
#  Potentials used in modelling rare earth fluorides.
#
#  NB check rmax cutoffs for bucks
#
species
La  core   3.00
Ce  core   3.00
Pr  core   3.00
Nd  core   3.00
Sm  core   3.00
Eu  core   3.00
Gd  core   3.00
Tb  core   3.00
Dy  core   3.00
Ho  core   3.00
Er  core   3.00
Tm  core   3.00
Yb  core   3.00
Lu  core   3.00
F   core   0.59
F   shell -1.59

buckingham
La  core  F  shell  2817.74   0.2980  0.0 0.0   12.0
Ce  core  F  shell  2627.13   0.2980  0.0 0.0   12.0
Pr  core  F  shell  2453.39   0.2980  0.0 0.0   12.0
Nd  core  F  shell  2488.27   0.2950  0.0 0.0   12.0
Sm  core  F  shell  1764.57   0.3064  0.0 0.0   12.0
Eu  core  F  shell  2085.74   0.2950  0.0 0.0   12.0
Gd  core  F  shell  1667.02   0.3037  0.0 0.0   12.0
Tb  core  F  shell  1541.15   0.3065  0.0 0.0   12.0
Dy  core  F  shell  1536.68   0.3037  0.0 0.0   12.0
Ho  core  F  shell  2590.91   0.2809  0.0 0.0   12.0
Er  core  F  shell  1880.44   0.2920  0.0 0.0   12.0
Tm  core  F  shell  1390.19   0.3037  0.0 0.0   12.0
Yb  core  F  shell  2381.55   0.2808  0.0 0.0   12.0
Lu  core  F  shell  1448.23   0.2990  0.0 0.0   12.0
buck4
F   shel  F   shel  1127.7 0.2753 15.83 2.0 2.79 3.031 12.0

spring
F 20.77