Both Rhombic and Monoclinic sulphur consist of $S_8$ molecules packed together. Yet the former is more stable below $96^{\circ}C$ and spontaneously converts to monoclinic sulphur above that temperature. Does this have something to do with the crystal structure? Gibbs equation tells us that structures with higher entropy are preferred at a higher temperature.

Does that mean a monoclinic structure has higher entropy and lower enthalpy, if that's true why is entropy higher? Or is my hypothesis wrong and it's based on something completely different.