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Short helpfile for action ARGS2VATOM
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The following arguments are compulsory: 

                   XPOS - the x position of the atom 
                   YPOS - the y position of the atom 
                   ZPOS - the z position of the atom 
                   MASS - the mass of the atom 
                 CHARGE - the charge of the atom 

In addition you may use the following options: 

  NUMERICAL_DERIVATIVES - ( default=off ) calculate the derivatives for these 
                          quantities numerically 
             FRACTIONAL - ( default=off ) the input arguments are calculated in 
                          fractional coordinates so you need to multiply by the cell 

