I was doing some test flying in a S/C and landed on a frozen lake with just a little loose snow on it. I intentionally put into a sliding turn (you know, like when you were a kid with the pickup truck and a slick road).
After playing like this for a while I learned that with no friction on the tires after about 100 degrees of turn I could not stop the left turn with full right rudder and full power. It would just go around and around and increase the speed of rotation. So if you are going to ground loop try to make sure that you have some traction for braking and don't rely on just power to stop the turn. And lots of open space is good.
P.S. it was kind of fun, I'm still just a kid.