Niobium Chloride (NbCl5) Cl5Nb1(cr,l) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 298.15 147.904 214.053 214.053 0. -797.470 -684.141 119.859 300 147.904 214.968 214.056 0.274 -797.400 -683.438 118.997 400 147.904 257.518 219.858 15.064 -793.792 -646.006 84.360 478.900 147.904 284.145 228.321 26.734 CRYSTAL <--> LIQUID 478.900 218.448 354.886 228.321 60.612 TRANSITION 500 216.564 364.264 233.862 65.201 -755.148 -610.971 63.828 600 206.397 402.878 258.937 86.364 -745.678 -583.044 50.759 700 194.430 433.819 281.789 106.421 -737.456 -556.607 41.535 800 180.611 458.900 302.414 125.189 -730.635 -531.254 34.687