Neutron diffraction and thermal studies of amorphous CS2 realised by low-temperature vapour deposition
We have succeeded in preparing amorphous carbon disulphide (CS2) by depositing its vapour on a cold substrate at 10 K. Complete formation of the amorphous state has been confirmed by neutron diffraction and differential thermal analysis (DTA). The amorphous sample crystallised at ca. 70 K, which is lower than the hypothetical glass transition temperature (92 K) estimated from the DTA data of the (CS2)x(S2Cl2)1 - x binary mixture. CS2, a symmetric linear tri-atomic molecule, is the simplest of the amorphised molecular substances whose structural and thermal information has been reported so far. Comparison of the static structure factors S(Q) has shown that the orientational correlation of CS2 molecules may be much stronger in the amorphous state than in the liquid state at higher temperature.