Raman and infrared spectra of 4-methyl-1,2,4-triazolethione showed that two
crystalline phases, one stable and the other metastable, can be obtained f
rom various crystallization processes. The metastable phase transforms into
the stable phase at 395 K by an irreversible first-order phase transition.
The two phases were characterized spectroscopically and structural propert
ies are discussed. Copyright (C) 2000 John Whey & Sons, Ltd.