Niobium Bromide (NbBr5) Br5Nb1(l) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 250 298.15 147.904 274.005 274.005 0. -545.074 -502.446 88.026 300 147.904 274.920 274.008 0.274 -545.196 -502.181 87.438 350 147.904 297.720 275.809 7.669 -620.672 -490.908 73.264 350.000 147.904 297.720 275.809 7.669 GLASS <--> LIQUID 350.000 228.280 297.720 275.809 7.669 TRANSITION 400 224.848 327.984 280.486 18.999 -615.178 -472.748 61.735 500 216.564 377.299 295.131 41.084 -604.887 -438.351 45.794 527.000 215.228 388.599 299.634 46.884 CRYSTAL <--> LIQUID 600 206.397 415.912 312.167 62.247 595.635 405.932 35.339 700 194.430 446.854 329.276 82.304 -587.580 -374.969 27.981 800 180.611 471.921 345.594 101.061 -580.902 -345.069 22.531 900 166.218 492.368 360.805 118.407 -575.705 -315.918 18.335