  Richardson potential is an phenomenological interquark interaction taking
care of two aspects of QCD, namely the asymptotic freedom and the confinement.
The original potential has a scale parameter having value around 400 MeV and is
well tested in hadronic property calculations. This potential was then used in
strange star calculation. Strange stars are very compact stars composed of
strange quark matter i.e. a very high density strange quark phase consisting of
deconfined u, d and s quarks. Here the value of the scale parameter was taken
as 100 MeV. The argument was that for a deconfined quark system like a strange
star, the scale parameter may have a value quite different from that used in
hadronic sector. To remove this discrepancy we introduced two scale parameters
in the potential, one for the asymptotic freedom part and the other for the
confining part. With suitable values of the parameters, this modified potential
has been successfully used in both baryonic property and strange star
calculations. The Equation of States obtained with the modified potential are
also used to obtain mass-radius relations for the strange stars.
