Lead Fluoride (PbF2) F2Pb1(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 74.266 130.927 130.927 0. -660.320 -619.579 108.548 300 74.392 131.386 130.928 0.138 -660.290 -619.326 107.834 400 76.776 153.101 133.873 7.691 -658.685 -605.914 79.124 500 79.705 170.548 139.517 15.515 -657.040 -592.909 61.941 600 82.634 185.339 145.951 23.632 -655.286 -580.246 50.515 700 85.563 198.297 152.522 32.042 -658.249 -567.089 42.317 700.000 85.563 198.297 152.522 32.042 GLASS <--> LIQUID 700.000 109.202 198.297 152.522 32.042 TRANSITION 800 109.202 212.879 159.176 42.962 -653.956 -554.359 36.196 900 109.202 225.741 165.871 53.883 -649.675 -542.167 31.467 1000 109.202 237.247 172.444 64.803 -645.399 -530.451 27.708 1100 109.202 247.655 178.815 75.723 -641.123 -519.163 24.653 1103.000 109.202 247.952 179.003 76.051 BETA <--> LIQUID 1200 109.202 257.157 184.954 86.643 636.843 508.265 22.124 1300 109.202 265.897 190.848 97.564 -632.563 -497.723 19.999 1400 109.202 273.990 196.502 108.484 -628.296 -487.511 18.189 1500 109.202 281.524 201.922 119.404 -624.050 -477.604 16.632