Silicon Nitride, Alpha (Si3N4) N4Si3(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 99.533 112.967 112.967 0. -744.752 -647.343 113.412 300 99.788 113.583 112.969 0.184 -744.787 -646.739 112.607 400 110.667 143.790 117.014 10.711 -746.459 -613.792 80.153 500 120.708 169.582 125.007 22.288 -747.595 -580.482 60.643 600 129.704 192.417 134.374 34.826 -748.151 -546.998 47.620 700 138.072 213.048 144.162 48.220 -748.186 -513.462 38.315 800 145.812 232.003 153.973 62.424 -747.729 -479.956 31.338 900 152.298 249.566 163.631 77.342 -746.850 -446.533 25.916 1000 158.155 265.920 173.051 92.869 -745.635 -413.227 21.585 1100 163.678 281.258 182.198 108.966 -744.100 -380.058 18.047 1200 168.490 295.712 191.061 125.581 -742.280 -347.041 15.106 1300 172.531 309.362 199.641 142.637 -740.233 -314.187 12.624 1400 175.920 322.276 207.944 160.065 -738.019 -281.496 10.503 1500 178.657 334.510 215.977 177.799 -735.694 -248.968 8.670 1600 180.548 346.102 223.751 195.762 -733.327 -216.597 7.071 1700 182.171 357.098 231.274 213.900 -881.495 -183.033 5.624 1800 183.452 367.548 238.557 232.183 -878.469 -142.034 4.122 1900 184.539 377.496 245.610 250.584 -875.367 -101.205 2.782 2000 185.435 386.986 252.444 269.084 -872.202 -60.541 1.581 2100 185.780 396.041 259.068 287.645 -869.010 -20.037 0.498 2200 186.111 404.692 265.492 306.240 -865.814 20.316 -0.482 2300 186.429 412.972 271.725 324.867 -862.612 60.523 -1.375 2400 186.734 420.913 277.777 343.525 -859.403 100.590 -2.189 2500 187.025 428.541 283.656 362.213 -856.187 140.524 -2.936 2600 187.303 435.882 289.371 380.930 -852.962 180.329 -3.623 2700 187.567 442.956 294.929 399.673 -849.729 220.009 -4.256 2800 187.818 449.782 300.338 418.443 -846.487 259.570 -4.842 2900 188.056 456.377 305.606 437.236 -843.236 299.015 -5.386 3000 188.280 462.756 310.738 456.053 -839.977 338.347 -5.891