decrepitate

verb (used with object), de·crep·i·tat·ed, de·crep·i·tat·ing.

1. to roast or calcine (salt, minerals, etc.) so as to cause crackling or until crackling ceases.

verb (used without object), de·crep·i·tat·ed, de·crep·i·tat·ing.

2. to break up when exposed to heat.

verb

1. (tr) to heat (a substance, such as a salt) until it emits a crackling sound or until this sound stops
2. (intr) (esp of a salt) to crackle, as while being heated