Tungsten Fluoride Oxide (WF4O) F4O1W1(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 298.15 133.578 175.728 175.728 0. -1406.908 -1298.058 227.414 300 133.888 176.555 175.731 0.247 -1406.848 -1297.383 225.894 379.000 147.109 209.337 179.398 11.347 CRYSTAL <--> LIQUID 400 150.624 217.357 181.182 14.470 1403.013 1261.438 164.727 500 166.523 252.746 192.028 30.359 -1397.900 -1226.610 128.143 600 178.657 284.242 204.821 47.653 -1391.690 -1192.920 103.853 700 186.606 312.412 218.216 65.937 -1384.737 -1160.334 86.585 800 192.046 337.703 231.599 84.883 -1377.323 -1128.778 73.702 900 195.811 360.557 244.679 104.290 -1369.616 -1098.170 63.736 1000 197.903 381.310 257.321 123.990 -1361.761 -1068.430 55.809