1) Chemical process 2) Crackle 3) Crackling 4) Crepitation 1) Snap 
Decrepitation is the noise produced when certain chemical compounds are heated. Such compounds include Lead nitrate and calcine. ==Mineralogy== Decrepitation is one of the most accurate ways to calculate a mineral-deposit scale so that the analysis of the hydrothermal system is advanced and improved. Fluid inclusions are important in regards to de...
• (n.) The act of decrepitating; a crackling noise, such as salt makes when roasting.
Crackling; the snapping of certain salts when heated. ... Origin: L. De, from, + crepo, pp. Crepitus, to crackle ... (05 Mar 2000) ... 
An explosive shattering of minerals, usually through tube tests or blowpipe tests.
De·crep`i·ta'tion noun [ Confer French décrépitation .] The act of decrepitating; a crackling noise, such as salt makes when roasting. 
Type: Term Pronunciation: dē′krep-i-tā′shŭn Definitions: 1. Crackling; the snapping of certain salts when heated.
[n] - the crackling or breaking up of certain crystals when they are heated
decrepitation The crackling or breaking up of certain crystals when they are heated.
Rapid physical decomposition of some crystals when heated. Characterized by a crackling noise. 
noun the crackling or breaking up of certain crystals when they are heated