Niobium, Ion (Nb+) Nb1+(g) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 0. 0. INFINITE -8.015 1393.983 100 26.964 152.351 209.002 -5.665 200 28.783 171.684 186.012 -2.866 250 29.250 178.162 183.816 -1.414 298.15 29.421 183.333 183.333 0. 1402.954 1352.911 -237.024 300 29.423 183.515 183.333 0.054 1403.002 1352.600 -235.509 350 29.331 188.046 183.691 1.524 1404.265 1344.099 -200.596 400 29.059 191.947 184.485 2.985 1405.503 1335.419 -174.388 450 28.698 195.349 185.507 4.429 1406.710 1326.586 -153.986 500 28.323 198.353 186.645 5.854 1407.886 1317.620 -137.651 600 27.697 203.458 189.036 8.653 1410.151 1299.353 -113.119 700 27.316 207.696 191.407 11.402 1412.322 1280.714 -95.568 800 27.143 211.330 193.676 14.123 1414.425 1261.768 -82.385 900 27.099 214.524 195.819 16.835 1416.476 1242.562 -72.116 1000 27.118 217.380 197.834 19.545 1418.485 1223.131 -63.890 1100 27.159 219.966 199.731 22.259 1420.457 1203.499 -57.149 1200 27.203 222.331 201.517 24.977 1422.394 1183.690 -51.525 1300 27.242 224.510 203.203 27.700 1424.296 1163.721 -46.759 1400 27.281 226.530 204.798 30.426 1426.163 1143.606 -42.668 1500 27.324 228.414 206.310 33.156 1427.990 1123.360 -39.119 1600 27.378 230.179 207.747 35.891 1429.771 1102.993 -36.009 1700 27.448 231.841 209.116 38.632 1431.500 1082.516 -33.262 1800 27.537 233.412 210.423 41.381 1433.171 1061.939 -30.817 1900 27.647 234.904 211.672 44.140 1434.782 1041.271 -28.627 2000 27.780 236.325 212.870 46.911 1436.329 1020.519 -26.653 2100 27.934 237.684 214.019 49.697 1437.809 999.692 -24.866 2200 28.108 238.988 215.125 52.499 1439.217 978.796 -23.240 2300 28.300 240.242 216.190 55.319 1440.548 957.838 -21.753 2400 28.507 241.450 217.217 58.159 1441.793 936.823 -20.389 2500 28.726 242.618 218.210 61.021 1442.938 915.759 -19.134 2600 28.956 243.750 219.171 63.905 1443.961 894.651 -17.974 2700 29.193 244.847 220.101 66.812 1444.823 873.507 -16.899 2800 29.437 245.913 221.004 69.744 1419.114 852.819 -15.910 2900 29.686 246.950 221.881 72.700 1420.802 832.564 -14.996 3000 29.939 247.961 222.734 75.681 1422.514 812.251 -14.143 3100 30.196 248.947 223.563 78.688 1424.252 791.880 -13.343 3200 30.457 249.909 224.372 81.720 1426.016 771.453 -12.593 3300 30.723 250.851 225.160 84.779 1427.807 750.970 -11.887 3400 30.996 251.772 225.929 87.865 1429.624 730.433 -11.222 3500 31.276 252.674 226.680 90.979 1431.469 709.842 -10.594 3600 31.566 253.560 227.415 94.121 1433.343 689.197 -10.000 3700 31.868 254.429 228.133 97.292 1435.246 668.500 -9.438 3800 32.183 255.283 228.837 100.495 1437.179 647.752 -8.904 3900 32.513 256.123 229.525 103.729 1439.145 626.952 -8.397 4000 32.861 256.950 230.201 106.998 1441.145 606.101 -7.915 4100 33.229 257.766 230.863 110.302 1443.181 585.200 -7.456 4200 33.617 258.571 231.513 113.644 1445.255 564.248 -7.017 4300 34.027 259.367 232.152 117.027 1447.368 543.247 -6.599 4400 34.461 260.154 232.779 120.451 1449.524 522.196 -6.199 4500 34.917 260.934 233.396 123.919 1451.724 501.096 -5.817 4600 35.398 261.707 234.003 127.435 1453.971 479.946 -5.450 4700 35.902 262.473 234.601 131.000 1456.267 458.747 -5.098 4800 36.428 263.235 235.190 134.616 1458.615 437.498 -4.761 4900 36.977 263.991 235.770 138.286 1461.016 416.200 -4.437 5000 37.546 264.744 236.342 142.012 1463.473 394.853 -4.125 5100 38.133 265.493 236.906 145.796 1465.989 373.456 -3.825 5200 38.737 266.240 237.463 149.639 777.892 361.318 -3.629 5300 39.356 266.983 238.013 153.544 780.196 353.285 -3.482 5400 39.985 267.725 238.556 157.511 782.589 345.204 -3.339 5500 40.624 268.464 239.093 161.541 784.972 337.082 -3.201 5600 41.268 269.202 239.624 165.636 787.392 328.917 -3.068 5700 41.915 269.938 240.150 169.795 789.847 320.708 -2.939 5800 42.561 270.673 240.670 174.019 792.339 312.456 -2.814 5900 43.203 271.406 241.184 178.307 794.866 304.160 -2.693 6000 43.839 272.137 241.694 182.659 797.428 295.822 -2.575