CCL: Force field for Manganese and silicon

Dear All,
I try to simulate the system of manganese silicide using MD simulation, however, I can't find a force field parameter for Mn-Si. Does any one know who has simulated similar systems.

Dr. Liuming Yan

Department of Chemistry
Shanghai University
99 Shangda Road, Shanghai 200444,
China, The People's Republic of
Tele: 021-6613-2405