Nickel Sulfide (NiS2) Ni1S2(cr,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 70.626 71.965 71.965 0. -131.378 -124.813 21.867 300 70.664 72.402 71.966 0.131 -131.379 -124.772 21.725 400 72.739 93.015 74.763 7.301 -136.131 -122.358 15.978 500 74.814 109.469 80.112 14.678 -139.577 -118.542 12.384 600 76.889 123.292 86.186 22.264 -142.439 -114.057 9.930 700 78.965 135.301 92.363 30.056 -144.663 -109.134 8.144 800 81.040 145.981 98.410 38.057 -146.172 -103.951 6.787 900 83.115 155.646 104.241 46.264 -253.607 -96.438 5.597 1000 85.190 164.510 109.830 54.680 -252.093 -79.055 4.129 1100 87.266 172.727 115.179 63.302 -250.470 -61.829 2.936 1200 89.341 180.409 120.298 72.133 -248.744 -44.755 1.948 1280.000 91.001 186.228 124.238 79.346 CRYSTAL <--> LIQUID 1280.000 91.002 237.691 124.238 145.219 TRANSITION 1300 91.002 239.102 125.995 147.039 -181.052 -28.858 1.160 1400 91.002 245.846 134.318 156.140 -179.283 -17.218 0.642 1500 91.002 252.124 141.965 165.240 -177.635 -5.700 0.199 1600 91.002 257.998 149.035 174.340 -176.111 5.712 -0.186 1700 91.002 263.515 155.609 183.440 -174.715 17.032 -0.523 1800 91.002 268.716 161.749 192.540 -190.600 28.989 -0.841