CKIVIS    CKIVIS    CKIVIS    CKIVIS    CKIVIS    CKIVIS    CKIVIS    
          **********************************************
                    **************************
                              ******

SUBROUTINE CKIVIS (P, T, X, XNUIM, K, ICKWRK, RCKWRK, VISI)
Returns the ion species viscosities given collision frequencies.

INPUT
ICKWRK(*) - Integer workspace array; dimension at least LENICK.
RCKWRK(*) - Real workspace array; dimension at least LENRCK.
P         - Real scalar, pressure.
               cgs units, dynes/cm**2
T(*)      - Real array, temperature(s); dimension is determined by
            the application program to be the total number of
            species temperatures, nominally 1.
               cgs units, K
X(*)      - Real array of mole fractions of the mixture;
            dimension at least KK, the total species count.
XNUIM     - Real scalar, momentum-transfer collision frequency
            for an ion
K         - Integer scalar, species index of the ion
OUTPUT
VISI      - Real scalar, ion viscosity
               cgs units, GM/CM*S