/usr/share/gromacs/top/oplsaa.ff/ions.itp is in gromacs-data 4.5.5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | ;
; See literature references in forcefield.itp and atomtypes.atp
;
[ moleculetype ]
; molname nrexcl
CU 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 Cu2+ 1 CU CU 1 2 63.54600
[ moleculetype ]
; molname nrexcl
ZN 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 Zn2+ 1 ZN ZN 1 2 65.37000
[ moleculetype ]
; molname nrexcl
MG 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_411 1 MG MG 1 2 24.30500
[ moleculetype ]
; molname nrexcl
CA 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_412 1 CA CA 1 2 40.08000
[ moleculetype ]
; molname nrexcl
LI 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_406 1 LI LI 1 1 6.941
[ moleculetype ]
; molname nrexcl
NA 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_407 1 NA NA 1 1 22.98977
[ moleculetype ]
; molname nrexcl
K 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_408 1 K K 1 1 39.0983
[ moleculetype ]
; molname nrexcl
RB 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_409 1 RB RB 1 1 85.4678
[ moleculetype ]
; molname nrexcl
CS 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_410 1 CS CS 1 1 132.9054
[ moleculetype ]
; molname nrexcl
F 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_400 1 F F 1 -1 18.9984
[ moleculetype ]
; molname nrexcl
CL 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_401 1 CL CL 1 -1 35.45300
[ moleculetype ]
; molname nrexcl
BR 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_402 1 BR BR 1 -1 79.904
[ moleculetype ]
; molname nrexcl
I 1
[ atoms ]
; id at type res nr residu name at name cg nr charge mass
1 opls_403 1 I I 1 -1 126.9045
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