It has been shown that form 1 results from rapid cooling from the melt, andform 2 results from slow cooling.Form 1 appears to be kinetically favored, while form 2 is thermodynamically preferred.

• 高温峰被认为来自于熔体的快速冷却(动力学优先)，低温峰则来自于缓慢冷却(热力学优先)。