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root/group/trunk/OOPSE-2.0/forceFields/DUFF2.frc
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Comparing trunk/OOPSE-2.0/forceFields/DUFF2.frc (file contents):
Revision 2102 by tim, Thu Mar 10 16:14:07 2005 UTC vs.
Revision 2117 by gezelter, Fri Mar 11 15:52:59 2005 UTC

# Line 108 | Line 108 | begin MultipoleAtomTypes
108   end ChargeAtomTypes
109  
110   begin MultipoleAtomTypes
111 < //only support up tp quadrupole.
112 < //possible format:
111 > // OOPSE currently only supports charge-charge, charge-dipole,
112 > // dipole-dipole, and charge-quadrupole interactions.
113 > // Dipoles may be either traditional point-dipoles or split-dipoles.
114 > // possible formats for a multipolar atom type are:
115 > //
116 > // Point-dipoles:
117   // name d phi theta psi dipole_moment
118 + //
119 + // Split-dipoles:
120   // name s phi theta psi dipole_moment splitdipole_distance
121 + //
122 + // Point-Quadrupoles:
123   // name q phi theta psi Qxx Qyy Qzz
124 + //
125 + // Atoms with both dipole and quadrupole moments:
126   // name dq phi theta psi dipole_moment Qxx Qyy Qzz
127 + //
128 + // Atoms with both split dipoles and quadrupole moments:
129   // name sq phi theta psi dipole_moment splitdipole_distance Qxx Qyy Qzz
118 // euler angles are given in units of degree
119 // dipoles are given in units of Debye
120 // split dipole distances are given in units of Angstrom
121 // quadrupoles are given in units of
130   //
131 < SSD_E   d       0.0     0.0     0.0     2.42
132 < SSD_RF  d       0.0     0.0     0.0     2.48
133 < SSD     d       0.0     0.0     0.0     2.35
134 < SSD1    d       0.0     0.0     0.0     2.35
131 > // Euler angles are given in zxz convention in units of degrees.
132 > //
133 > // Charges are given in units of electrons.
134 > //
135 > // Dipoles are given in units of Debyes.
136 > //
137 > // Split dipole distances are given in units of Angstroms.
138 > //  
139 > // Quadrupole moments are given in units of 10^-26 esu cm^2 (also known as an
140 > //                                                           esu centi-barn)
141 > //
142 > SSD_E   dq       0.0     0.0     0.0     2.42  -1.682  1.762  -0.08
143 > SSD_RF  dq       0.0     0.0     0.0     2.48  -1.682  1.762  -0.08
144 > SSD     dq       0.0     0.0     0.0     2.35  -1.682  1.762  -0.08
145 > SSD1    dq       0.0     0.0     0.0     2.35  -1.682  1.762  -0.08
146   //HDP     s       0.0     0.0     0.0     20.6    4.63
147   end MultipoleAtomTypes
148  

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