Niobium Bromide (NbBr5) Br5Nb1(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 250 298.15 147.904 258.780 258.780 0. -556.054 -508.887 89.155 300 147.904 259.695 258.783 0.274 -556.176 -508.593 88.554 400 147.904 302.245 264.585 15.064 -630.093 -477.367 62.338 500 147.904 335.249 275.540 29.854 -627.096 -439.535 45.918 527.000 147.904 343.027 278.800 33.848 CRYSTAL <--> LIQUID 600 147.904 362.215 287.807 44.645 624.217 402.295 35.023 700 147.904 385.014 300.107 59.435 -621.429 -365.530 27.276 800 147.904 404.764 311.982 74.226 -618.717 -329.159 21.492