ane ▁has ▁been ▁de emed ▁a ▁ 0 ▁in ▁total ▁ring ▁stra in . ▁ ▁Sol id ▁phases ▁Cy clo hex ane ▁has ▁two ▁cry st all ine ▁phases . ▁The ▁high - temper ature ▁phase ▁I , ▁stable ▁between ▁ 1 8 6 ▁K ▁and ▁the ▁mel ting ▁point ▁ 2 8 0 ▁K , ▁is ▁a ▁pl astic ▁cry stal , ▁which ▁means ▁the ▁mole cules ▁retain ▁some ▁rot ational ▁degree ▁of ▁freedom . ▁The ▁low - temper ature ▁( below ▁ 1 8 6 ▁K ) ▁phase ▁II ▁is ▁ordered . ▁Two ▁other ▁low - temper ature ▁( met ast able ) ▁phases ▁III ▁and ▁IV ▁have ▁been ▁obtained ▁by ▁application ▁of ▁moder ate ▁press ures ▁above ▁ 3 0 ▁M Pa , ▁where ▁phase ▁IV ▁appears ▁exclus ively ▁in ▁de uter ated ▁cy clo hex ane ▁( application ▁of ▁pressure ▁increases ▁the ▁values ▁of ▁all ▁transition ▁temper atures ). ▁ ▁Here ▁Z ▁is ▁the ▁number ▁structure ▁units ▁per ▁unit ▁cell ; ▁the ▁unit ▁cell ▁constants ▁a , ▁b ▁and ▁c ▁were ▁measured ▁at ▁the ▁given ▁temperature ▁T ▁and ▁pressure ▁P . ▁ ▁See ▁also ▁ ▁The ▁F li x borough ▁dis aster , ▁a ▁major ▁industrial ▁accident ▁caused ▁by ▁an ▁explos ion ▁of ▁cy clo hex ane . ▁ ▁H ex ane ▁Ring ▁f lip ▁ ▁Cy clo hex ane ▁( data ▁page ) ▁ ▁References ▁ ▁External ▁links ▁ ▁International ▁Chem ical ▁Saf ety ▁Card ▁ 0 2 4 2 ▁ ▁National ▁Pol l ut ant ▁In ventory