出典:Wiktionary
decrepitation (countable かつ uncountable, 複数形 decrepitations)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/07 00:52 UTC 版)
Decrepitation is the breaking of a substance usually accompanied by the emission of a crackling sound. An example for a substance which decrepitates on heating is lead nitrate (Pb(NO3)2). The crackling noise which several salts make when suddenly heated, accompanied by a violent exfoliation of their particles. It has been attributed to the sudden conversion of the water they contain into steam. It is also shown by most ammonium salts and by barium nitrate. It is an important characteristic property that is used in dry tests within the laboratory.