Fe–Nb system

115 accepted literature values from 5 paper(s) (experimental 55, model 60); 16 calculated phase diagram(s). 14 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	55
model	60

Accepted values by property group
Property group	Values
invariant reaction	96
phase transition	4
formation	9
mixing / partial	2
heat capacity / entropy / enthalpy	4

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
FeNb-00Tof.tdb	C. Toffolon, C. Servant, Calphad, 24, 97-112(2000). doi:10.1016/S0364-5916(00)00017-1	`8db1f9ea72128212bd714adcc3fab1e9340a7fbb59666f51600f2e77a9971c72`	viewer · TDB · JSON
FeNb-01Lee.tdb	B.-J. Lee, Metall. Mater. Trans. A, 32A, 2423-39(2001). doi:10.1007/s11661-001-0033-x	`be8d18ef407a320af9f25de76ac6d431c2c2deb5f3043817926059a5face6621`	viewer · TDB · JSON
FeNb-08Yos.tdb	K. Yoshitomi, Y. Nakama, H. Ohtani, M. Hasebe, ISIJ Int., 48, 835-44(2008). doi:10.2355/isijinternational.48.835	`d9c17bfc623833e3fde5204c8efc0d2e4fe5a7f0699f4979e19b49647951f429`	viewer · TDB · JSON
FeNb-09Mat.tdb	M. Mathon, D. Connetable, B. Sundman, J. Lacaze, Calphad, 33, 136-61(2009). doi:10.1016/j.calphad.2008.10.005	`bfbae9043c6ef6b6f2398d47471a0762e3b8bb802802f017fb32add380167ba7`	viewer · TDB · JSON
FeNb-12Khv.tdb	A.V. Khvan, B. Hallstedt, Calphad, 39, 62-69(2012). doi:10.1016/j.calphad.2012.09.001	`1a30e08ced98f20f005286960c3d5bbbdb8e4bbf7126314559d92e247ccd66ad`	viewer · TDB · JSON
FeNb-12Liu.tdb	S. Liu, B. Hallstedt, D. Music, Y. Du, Calphad, 38, 43-58(2012). doi:10.1016/j.calphad.2012.03.004	`fd5ee7f090c38e04af5b367c63ec73ec902d2dd70a3189a2cf51bc416bb9e3cb`	viewer · TDB · JSON
FeNb-13Khv.tdb	A.V. Khvan, B. Hallstedt, Calphad, 40, 10-15(2013). doi:10.1016/j.calphad.2012.11.001	`fb96ec3d863b310a3bc11e0175ec3abb92505878399b9035334ccc6c68a1af66`	viewer · TDB · JSON
FeNb-15Mie.tdb	J. Miettinen, G. Vassilev, J. Phase Equilib. Diffus., 36, 68-77(2015). doi:10.1007/s11669-014-0351-5	`ee2b30b1debd39dfcb5cefa20f9c13457d1c7075367e9d952097e21c549e2940`	viewer · TDB · JSON
FeNb-16Jac.tdb	A. Jacob, C. Schmetterer, A. Khvan, A. Kondratiev, D. Ivanov, B. Hallstedt, Calphad, 54, 1-15(2016). doi:10.1016/j.calphad.2016.04.013	`af8ab6c509d52d57eceee3a8e1ac329a830ad73b02e9982bc28845cdd4ca98eb`	viewer · TDB · JSON
FeNb-17He.tdb	C. He, Y. Qin, F. Stein, J. Phase Equilib. Diffus., 38, 771-87(2017). doi:10.1007/s11669-017-0566-3	`76ab0f6b57cfc83d5a7b425cfd120d2b4428c3e33ea2de51d08650f4aa8b3bbc`	viewer · TDB · JSON
FeNb-17Lu.tdb	H.-J. Lu, N. Zou, X.-S. Zhao, J.-Y. Shen, X.-G. Lu, Y.-L. He, Intermetallics, 88, 91-100(2017). doi:10.1016/j.intermet.2017.05.008	`a0fac59acd402a2e11c6b113927d8288b16b533df21a87c8bf8dbb971a68b196`	viewer · TDB · JSON
FeNb-21Laf.tdb	P. Lafaye, C. Toffolon-Masclet, J.-C. Crivello, J.-M. Joubert, J. Nucl. Mater., 544, 152692(2021). doi:10.1016/j.jnucmat.2020.152692	`4863d0381c0ee107639dd7d8ac2e219412dad09ebeb157118e18d5256e8c634f`	viewer · TDB · JSON
FeNb-23Pan.tdb	Q. Pan, W. Liu, T. Wu, W. Zheng, J. Wang, X.-G. Lu, Calphad, 80, 102529(2023). doi:10.1016/j.calphad.2023.102529	`7a7d73baed07c73bf7bf1068fa8c134a2992065aebe83f97716bbaaff3e396c9`	viewer · TDB · JSON
FeNb-24Sun.tdb	H. Sun, C. Wang, S.-L. Shang, A.M. Beese, J.-C. Zhao, Z.-K. Liu, Acta Mater., 268, 119747(2024). doi:10.1016/j.actamat.2024.119747	`fd8244df2b5988c71196757bd1821ccf7914bcc95dcaec83efaf7792d2d077ee`	viewer · TDB · JSON
FeNb-90Hua-LB.tdb	W. Huang, Z. Metallkd., 81, 397-404(1990). doi:10.1515/ijmr-1990-810602	`fb4b807d35e4fed62d97ec82f3186c50e9a1bbcb73ad825c05fd65da7ce6eca9`	viewer · TDB · JSON
FeNb-94Coe.tdb	G.C. Coelho, S.G. Fries, H.L. Lukas, P. Majewski, J.M. Zelaya Bejarano, S. Gama, C.A. Ribeiro, G. Effenberg, Materials Week 93, TMS, Pittsburgh, 1994, pp. 51-70.	`036b7ea8790b1c60534e5fceee20dc922c119a5701ec0cd580961889e6014db7`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
FeNb-00Tof.tdb	1793.23	C14_LAVES (x(Nb) 0.35047) + MU_D85 (x(Nb) 0.48338) + LIQUID (x(Nb) 0.51519)
FeNb-00Tof.tdb	1757.91	MU_D85 (x(Nb) 0.49373) + LIQUID (x(Nb) 0.59261) + BCC_A2 (x(Nb) 0.92292)
FeNb-00Tof.tdb	1667.46	BCC_A2 (x(Nb) 0.03123) + LIQUID (x(Nb) 0.0965) + C14_LAVES (x(Nb) 0.30521)
FeNb-00Tof.tdb	1472.2	FCC_A1 (x(Nb) 0.01154) + BCC_A2 (x(Nb) 0.01624) + C14_LAVES (x(Nb) 0.3082)
FeNb-00Tof.tdb	1215.25	FCC_A1 (x(Nb) 0.00259) + BCC_A2 (x(Nb) 0.00478) + C14_LAVES (x(Nb) 0.31478)
FeNb-01Lee.tdb	1865.82	C14_LAVES (x(Nb) 0.34877) + LIQUID (x(Nb) 0.38653) + MU_D85 (x(Nb) 0.45771)
FeNb-01Lee.tdb	1667.84	MU_D85 (x(Nb) 0.46143) + LIQUID (x(Nb) 0.66336) + BCC_A2 (x(Nb) 0.90937)
FeNb-01Lee.tdb	1653.31	BCC_A2 (x(Nb) 0.02533) + LIQUID (x(Nb) 0.10065) + C14_LAVES (x(Nb) 0.32042)
FeNb-01Lee.tdb	1459.81	FCC_A1 (x(Nb) 0.00972) + BCC_A2 (x(Nb) 0.01556) + C14_LAVES (x(Nb) 0.32507)
FeNb-01Lee.tdb	1227.66	FCC_A1 (x(Nb) 0.004) + BCC_A2 (x(Nb) 0.00705) + C14_LAVES (x(Nb) 0.32952)
FeNb-08Yos.tdb	1791.27	FE2NB_C14 (x(Nb) 0.35409) + MU_D85 (x(Nb) 0.4844) + LIQUID (x(Nb) 0.52325)
FeNb-08Yos.tdb	1757.91	MU_D85 (x(Nb) 0.49373) + LIQUID (x(Nb) 0.59261) + BCC_A2 (x(Nb) 0.92292)
FeNb-08Yos.tdb	1660.13	BCC_A2 (x(Nb) 0.03267) + LIQUID (x(Nb) 0.10093) + FE2NB_C14 (x(Nb) 0.30848)
FeNb-08Yos.tdb	1457.15	FCC_A1 (x(Nb) 0.0117) + BCC_A2 (x(Nb) 0.01661) + FE2NB_C14 (x(Nb) 0.32038)
FeNb-08Yos.tdb	1217.42	FCC_A1 (x(Nb) 0.00276) + BCC_A2 (x(Nb) 0.00508) + FE2NB_C14 (x(Nb) 0.32734)
FeNb-09Mat.tdb	1789.19	C14_LAVES (x(Nb) 0.35099) + MU_D85 (x(Nb) 0.48464) + LIQUID (x(Nb) 0.51847)
FeNb-09Mat.tdb	1756.94	MU_D85 (x(Nb) 0.50269) + LIQUID (x(Nb) 0.59231) + BCC_A2 (x(Nb) 0.92287)
FeNb-09Mat.tdb	1667.46	BCC_A2 (x(Nb) 0.03123) + LIQUID (x(Nb) 0.0965) + C14_LAVES (x(Nb) 0.30521)
FeNb-09Mat.tdb	1472.2	FCC_A1 (x(Nb) 0.01154) + BCC_A2 (x(Nb) 0.01624) + C14_LAVES (x(Nb) 0.3082)
FeNb-09Mat.tdb	1215.25	FCC_A1 (x(Nb) 0.00259) + BCC_A2 (x(Nb) 0.00478) + C14_LAVES (x(Nb) 0.31478)
FeNb-12Khv.tdb	1804.9	C14_LAVES (x(Nb) 0.40207) + MU_D85 (x(Nb) 0.49115) + LIQUID (x(Nb) 0.5097)
FeNb-12Khv.tdb	1779.69	MU_D85 (x(Nb) 0.51455) + LIQUID (x(Nb) 0.57889) + BCC_A2 (x(Nb) 0.90656)
FeNb-12Khv.tdb	1642.65	BCC_A2 (x(Nb) 0.03201) + LIQUID (x(Nb) 0.09642) + C14_LAVES (x(Nb) 0.25074)
FeNb-12Khv.tdb	1454.14	FCC_A1 (x(Nb) 0.01246) + BCC_A2 (x(Nb) 0.01821) + C14_LAVES (x(Nb) 0.25487)
FeNb-12Khv.tdb	1216.32	FCC_A1 (x(Nb) 0.00438) + BCC_A2 (x(Nb) 0.00675) + C14_LAVES (x(Nb) 0.26284)
FeNb-12Liu.tdb	1797.38	C14_LAVES (x(Nb) 0.40648) + MU_D85 (x(Nb) 0.486) + LIQUID (x(Nb) 0.5087)
FeNb-12Liu.tdb	1775.98	MU_D85 (x(Nb) 0.50621) + LIQUID (x(Nb) 0.56186) + BCC_A2 (x(Nb) 0.90925)
FeNb-12Liu.tdb	1635.65	BCC_A2 (x(Nb) 0.03208) + LIQUID (x(Nb) 0.10173) + C14_LAVES (x(Nb) 0.24854)
FeNb-12Liu.tdb	1452.46	FCC_A1 (x(Nb) 0.01098) + BCC_A2 (x(Nb) 0.01692) + C14_LAVES (x(Nb) 0.25209)
FeNb-12Liu.tdb	1217.24	FCC_A1 (x(Nb) 0.00296) + BCC_A2 (x(Nb) 0.00542) + C14_LAVES (x(Nb) 0.2596)
FeNb-13Khv.tdb	1808.05	C14_LAVES (x(Nb) 0.40374) + MU_D85 (x(Nb) 0.49813) + LIQUID (x(Nb) 0.52739)
FeNb-13Khv.tdb	1776.92	MU_D85 (x(Nb) 0.52095) + LIQUID (x(Nb) 0.60062) + BCC_A2 (x(Nb) 0.89304)
FeNb-13Khv.tdb	1647.59	BCC_A2 (x(Nb) 0.02742) + LIQUID (x(Nb) 0.0923) + C14_LAVES (x(Nb) 0.27228)
FeNb-13Khv.tdb	1455.95	FCC_A1 (x(Nb) 0.00954) + BCC_A2 (x(Nb) 0.01531) + C14_LAVES (x(Nb) 0.27804)
FeNb-13Khv.tdb	1219.36	FCC_A1 (x(Nb) 0.00313) + BCC_A2 (x(Nb) 0.00568) + C14_LAVES (x(Nb) 0.28774)
FeNb-15Mie.tdb	1790.26	FE2NB_C14 (x(Nb) 0.33333) + MU_D85 (x(Nb) 0.47182) + LIQUID (x(Nb) 0.48844)
FeNb-15Mie.tdb	1790.26	FE2NB_C14 (x(Nb) 0.33333) + MU_D85 (x(Nb) 0.47181) + LIQUID (x(Nb) 0.48826)
FeNb-15Mie.tdb	1725.98	MU_D85 (x(Nb) 0.49498) + LIQUID (x(Nb) 0.60423) + BCC_A2 (x(Nb) 0.92184)
FeNb-15Mie.tdb	1658.21	BCC_A2 (x(Nb) 0.02652) + LIQUID (x(Nb) 0.10062) + FE2NB_C14 (x(Nb) 0.33333)
FeNb-15Mie.tdb	1658.21	BCC_A2 (x(Nb) 0.02651) + LIQUID (x(Nb) 0.10058) + FE2NB_C14 (x(Nb) 0.33333)
FeNb-15Mie.tdb	1454.67	FCC_A1 (x(Nb) 0.00973) + BCC_A2 (x(Nb) 0.01545) + FE2NB_C14 (x(Nb) 0.33333)
FeNb-15Mie.tdb	1454.67	FCC_A1 (x(Nb) 0.00973) + BCC_A2 (x(Nb) 0.01544) + FE2NB_C14 (x(Nb) 0.33333)
FeNb-15Mie.tdb	1226.91	FCC_A1 (x(Nb) 0.00388) + BCC_A2 (x(Nb) 0.00685) + FE2NB_C14 (x(Nb) 0.33333)
FeNb-15Mie.tdb	1226.91	FCC_A1 (x(Nb) 0.00387) + BCC_A2 (x(Nb) 0.00684) + FE2NB_C14 (x(Nb) 0.33333)
FeNb-16Jac.tdb	1814.46	C14_LAVES (x(Nb) 0.40116) + MU_D85 (x(Nb) 0.49574) + LIQUID (x(Nb) 0.52141)
FeNb-16Jac.tdb	1775.56	MU_D85 (x(Nb) 0.5211) + LIQUID (x(Nb) 0.60027) + BCC_A2 (x(Nb) 0.89273)
FeNb-16Jac.tdb	1647.59	BCC_A2 (x(Nb) 0.02742) + LIQUID (x(Nb) 0.0923) + C14_LAVES (x(Nb) 0.27228)
FeNb-16Jac.tdb	1455.95	FCC_A1 (x(Nb) 0.00954) + BCC_A2 (x(Nb) 0.01531) + C14_LAVES (x(Nb) 0.27804)
FeNb-16Jac.tdb	1219.36	FCC_A1 (x(Nb) 0.00313) + BCC_A2 (x(Nb) 0.00568) + C14_LAVES (x(Nb) 0.28774)
FeNb-17He.tdb	1798.18	C14_LAVES (x(Nb) 0.36832) + MU_D85 (x(Nb) 0.47119) + LIQUID (x(Nb) 0.52921)
FeNb-17He.tdb	1777.88	MU_D85 (x(Nb) 0.51563) + LIQUID (x(Nb) 0.57853) + BCC_A2 (x(Nb) 0.9103)
FeNb-17He.tdb	1643.17	BCC_A2 (x(Nb) 0.03429) + LIQUID (x(Nb) 0.0935) + C14_LAVES (x(Nb) 0.26612)
FeNb-17He.tdb	1453.79	FCC_A1 (x(Nb) 0.01159) + BCC_A2 (x(Nb) 0.01729) + C14_LAVES (x(Nb) 0.26668)
FeNb-17He.tdb	1212.46	FCC_A1 (x(Nb) 0.00303) + BCC_A2 (x(Nb) 0.00514) + C14_LAVES (x(Nb) 0.27013)
FeNb-17Lu.tdb	1806.56	C14_LAVES (x(Nb) 0.38121) + MU_D85 (x(Nb) 0.48684) + LIQUID (x(Nb) 0.50056)
FeNb-17Lu.tdb	1776.83	MU_D85 (x(Nb) 0.51423) + LIQUID (x(Nb) 0.58261) + BCC_A2 (x(Nb) 0.90655)
FeNb-17Lu.tdb	1638.73	BCC_A2 (x(Nb) 0.03244) + LIQUID (x(Nb) 0.09902) + C14_LAVES (x(Nb) 0.26151)
FeNb-17Lu.tdb	1455.64	FCC_A1 (x(Nb) 0.01299) + BCC_A2 (x(Nb) 0.01875) + C14_LAVES (x(Nb) 0.26621)
FeNb-17Lu.tdb	1216.15	FCC_A1 (x(Nb) 0.00453) + BCC_A2 (x(Nb) 0.0069) + C14_LAVES (x(Nb) 0.27509)
FeNb-21Laf.tdb	1808.61	C14_LAVES (x(Nb) 0.38953) + MU_D85 (x(Nb) 0.48593) + LIQUID (x(Nb) 0.50779)
FeNb-21Laf.tdb	1805.07	FCC_A1 (x(Nb) 0) + LIQUID (x(Nb) 0) + BCC_A2 (x(Nb) 0)
FeNb-21Laf.tdb	1760.17	MU_D85 (x(Nb) 0.51212) + LIQUID (x(Nb) 0.60123) + BCC_A2 (x(Nb) 0.90015)
FeNb-21Laf.tdb	1641.75	BCC_A2 (x(Nb) 0.02731) + LIQUID (x(Nb) 0.09423) + C14_LAVES (x(Nb) 0.26312)
FeNb-21Laf.tdb	1441.81	FCC_A1 (x(Nb) 0.00958) + BCC_A2 (x(Nb) 0.01555) + C14_LAVES (x(Nb) 0.26608)
FeNb-21Laf.tdb	1225.23	FCC_A1 (x(Nb) 0.00389) + BCC_A2 (x(Nb) 0.0068) + C14_LAVES (x(Nb) 0.27142)
FeNb-23Pan.tdb	1814.26	C14_LAVES (x(Nb) 0.37899) + MU_D85 (x(Nb) 0.47593) + LIQUID (x(Nb) 0.5168)
FeNb-23Pan.tdb	1773.1	MU_D85 (x(Nb) 0.50521) + LIQUID (x(Nb) 0.59964) + BCC_A2 (x(Nb) 0.89217)
FeNb-23Pan.tdb	1653.21	BCC_A2 (x(Nb) 0.02627) + LIQUID (x(Nb) 0.08937) + C14_LAVES (x(Nb) 0.26455)
FeNb-23Pan.tdb	1464.53	FCC_A1 (x(Nb) 0.00943) + BCC_A2 (x(Nb) 0.01505) + C14_LAVES (x(Nb) 0.26946)
FeNb-23Pan.tdb	1222.42	FCC_A1 (x(Nb) 0.00337) + BCC_A2 (x(Nb) 0.0061) + C14_LAVES (x(Nb) 0.2786)
FeNb-24Sun.tdb	1794.09	C14_LAVES (x(Nb) 0.37955) + MU_D85 (x(Nb) 0.49164) + LIQUID (x(Nb) 0.52825)
FeNb-24Sun.tdb	1774.05	MU_D85 (x(Nb) 0.51687) + LIQUID (x(Nb) 0.58051) + BCC_A2 (x(Nb) 0.91379)
FeNb-24Sun.tdb	1650.26	BCC_A2 (x(Nb) 0.03045) + LIQUID (x(Nb) 0.09141) + C14_LAVES (x(Nb) 0.26905)
FeNb-24Sun.tdb	1476.55	FCC_A1 (x(Nb) 0.01529) + BCC_A2 (x(Nb) 0.02037) + C14_LAVES (x(Nb) 0.27281)
FeNb-24Sun.tdb	1229.6	FCC_A1 (x(Nb) 0.00708) + BCC_A2 (x(Nb) 0.01012) + C14_LAVES (x(Nb) 0.28034)
FeNb-90Hua-LB.tdb	1867.23	C14_LAVES (x(Nb) 0.33333) + LIQUID (x(Nb) 0.40247) + MU_D85 (x(Nb) 0.45756)
FeNb-90Hua-LB.tdb	1867.23	C14_LAVES (x(Nb) 0.33333) + LIQUID (x(Nb) 0.40243) + MU_D85 (x(Nb) 0.45756)
FeNb-90Hua-LB.tdb	1673.75	MU_D85 (x(Nb) 0.46137) + LIQUID (x(Nb) 0.65694) + BCC_A2 (x(Nb) 0.91012)
FeNb-90Hua-LB.tdb	1649.65	BCC_A2 (x(Nb) 0.02628) + LIQUID (x(Nb) 0.10482) + C14_LAVES (x(Nb) 0.33333)
FeNb-90Hua-LB.tdb	1649.65	BCC_A2 (x(Nb) 0.02626) + LIQUID (x(Nb) 0.10475) + C14_LAVES (x(Nb) 0.33333)
FeNb-90Hua-LB.tdb	1460.17	FCC_A1 (x(Nb) 0.00946) + BCC_A2 (x(Nb) 0.01535) + C14_LAVES (x(Nb) 0.33333)
FeNb-90Hua-LB.tdb	1460.17	FCC_A1 (x(Nb) 0.00946) + BCC_A2 (x(Nb) 0.01534) + C14_LAVES (x(Nb) 0.33333)
FeNb-90Hua-LB.tdb	1222.34	FCC_A1 (x(Nb) 0.00347) + BCC_A2 (x(Nb) 0.00624) + C14_LAVES (x(Nb) 0.33333)
FeNb-90Hua-LB.tdb	1222.34	FCC_A1 (x(Nb) 0.00345) + BCC_A2 (x(Nb) 0.00621) + C14_LAVES (x(Nb) 0.33333)
FeNb-94Coe.tdb	1795.28	C14_LAVES (x(Nb) 0.38617) + MU_D85 (x(Nb) 0.49313) + LIQUID (x(Nb) 0.52609)
FeNb-94Coe.tdb	1771.24	MU_D85 (x(Nb) 0.50969) + LIQUID (x(Nb) 0.58023) + BCC_A2 (x(Nb) 0.89383)
FeNb-94Coe.tdb	1645.55	BCC_A2 (x(Nb) 0.02428) + LIQUID (x(Nb) 0.0967) + C14_LAVES (x(Nb) 0.25805)
FeNb-94Coe.tdb	1462.69	FCC_A1 (x(Nb) 0.00936) + BCC_A2 (x(Nb) 0.01521) + C14_LAVES (x(Nb) 0.2718)
FeNb-94Coe.tdb	1232.3	FCC_A1 (x(Nb) 0.00343) + BCC_A2 (x(Nb) 0.00677) + C14_LAVES (x(Nb) 0.29227)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull FeNb-00Tof · CALPHAD hull FeNb-01Lee · CALPHAD hull FeNb-08Yos · CALPHAD hull FeNb-09Mat · CALPHAD hull FeNb-12Khv · CALPHAD hull FeNb-12Liu · CALPHAD hull FeNb-13Khv · CALPHAD hull FeNb-15Mie · CALPHAD hull FeNb-16Jac · CALPHAD hull FeNb-17He · CALPHAD hull FeNb-17Lu · CALPHAD hull FeNb-21Laf · CALPHAD hull FeNb-23Pan · CALPHAD hull FeNb-90Hua-LB · CALPHAD hull FeNb-94Coe

Invariant reactions (literature)

Invariant reactions reported in the literature for the Fe–Nb system (96)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1923	congruent melting: Liquid ↔ C14		experimental	[1] Sun 2024 cites Voronov 1937	Table 4, p. 5, row 4 report
1920.15	congruent melting: L = Fe2Nb	L: Nb 0.324; Fe2Nb: Fe 0.666667, Nb 0.333333	model	[2] He 2017 cites Liu 2012 doi	Table 3, p. 10, row 5 report
1919.15	congruent melting: L = Fe2Nb	L: Nb 0.327; Fe2Nb: Fe 0.666667, Nb 0.333333	model	[2] He 2017	Table 3, p. 10, row 1 report
1918.15	congruent melting: L = Fe2Nb	L: Nb 0.3333; Fe2Nb: Fe 0.666667, Nb 0.333333	experimental	[2] He 2017 cites Vo 2011 doi	Table 3, p. 10, row 2 report
1918	congruent melting: Liquid ↔ C14	Liquid: Nb 0.333; C14: Nb 0.333	experimental	[1] Sun 2024 cites Mathon 2009	Table 4, p. 5, row 3 report
1916.15	congruent melting: L = Fe2Nb	L: Nb 0.324; Fe2Nb: Fe 0.666667, Nb 0.333333	model	[2] He 2017 cites Khvan 2012 doi	Table 3, p. 10, row 4 report
1915	congruent melting: Liquid ↔ C14	Liquid: Nb 0.335; C14: Nb 0.335	model	[1] Sun 2024 cites Pan 2023 doi	Table 4, p. 5, row 2 report
1903.15	congruent melting: L = Fe2Nb	L: Fe 0.666667, Nb 0.333333; Fe2Nb: Fe 0.666667, Nb 0.333333	experimental	[2] He 2017 cites Zelaya 1993	Table 3, p. 10, row 3 report
1903	congruent melting: Liquid ↔ C14	Liquid: Nb 0.333; C14: Nb 0.333	model	[1] Sun 2024	Table 4, p. 5, row 1 report
1903	congruent melting: Liquid ↔ C14		experimental	[1] Sun 2024 cites Bejarano 1991 doi	Table 4, p. 5, row 5 report
1814	peritectic: Liquid + C14 ↔ μ	Liquid: Nb 0.519; C14: Nb 0.38; μ: Nb 0.477	model	[1] Sun 2024 cites Pan 2023 doi	Table 4, p. 5, row 7 report
1805.15	peritectic: Liq + Fe2Nb = Fe7Nb6	Liq: Nb 0.51; Fe2Nb: Nb 0.402; Fe7Nb6: Nb 0.491	model	[2] He 2017 cites Khvan 2012 doi	Table 3, p. 10, row 9 report
1798.15	peritectic: Liq + Fe2Nb = Fe7Nb6	Liq: Nb 0.53; Fe2Nb: Nb 0.368; Fe7Nb6: Nb 0.471	model	[2] He 2017	Table 3, p. 10, row 6 report
1797.15	peritectic: Liq + Fe2Nb = Fe7Nb6	Liq: Nb 0.509; Fe2Nb: Nb 0.407; Fe7Nb6: Nb 0.486	model	[2] He 2017 cites Liu 2012 doi	Table 3, p. 10, row 10 report
1796.15	peritectic: Liq + Fe2Nb = Fe7Nb6	Liq: Nb 0.52; Fe2Nb: Nb 0.376; Fe7Nb6: Nb 0.465	experimental	[2] He 2017 cites Vo 2011 doi	Table 3, p. 10, row 7 report
1796	peritectic: Liquid + C14 ↔ μ	Liquid: Nb 0.52; C14: Nb 0.376; μ: Nb 0.465	experimental	[1] Sun 2024 cites Vob 2011	Table 4, p. 5, row 8 report
1795	peritectic: D85 <=> C14 + Liq.		model	[3] Mathon 2009 cites Coelho 1994	Table 3, p. 13, row 19 report
1794	peritectic: Liquid + C14 ↔ μ	Liquid: Nb 0.527; C14: Nb 0.38; μ: Nb 0.491	model	[1] Sun 2024	Table 4, p. 5, row 6 report
1793.15	peritectic: Liq + Fe2Nb = Fe7Nb6	Liq: Nb 0.56; Fe2Nb: Nb 0.37; Fe7Nb6: Nb 0.49	experimental	[2] He 2017 cites Zelaya 1993	Table 3, p. 10, row 8 report
1793	peritectic: D85 <=> C14 + Liq.		model	[3] Mathon 2009 cites Toffolon 2000 doi	Table 3, p. 13, row 18 report
1793	peritectic: Liquid + C14 ↔ μ	Liquid: Nb 0.56; C14: Nb 0.37; μ: Nb 0.49	experimental	[1] Sun 2024 cites Bejarano 1993 doi	Table 4, p. 5, row 9 report
1793	peritectic: D85 <=> C14 + Liq.		experimental	[3] Mathon 2009 cites Zelaya 1993	Table 3, p. 13, row 20 report
1789	peritectic: D85 <=> C14 + Liq.		model	[3] Mathon 2009	Table 3, p. 13, row 17 report
1781.15	eutectic: Liq = Fe7Nb6 + (Nb)	Liq: Nb 0.586; Fe7Nb6: Nb 0.51; (Nb): Nb 0.91	experimental	[2] He 2017 cites Vo 2011 doi	Table 3, p. 10, row 12 report
1781	eutectic: Liquid ↔ μ + BCC_A2	Liquid: Nb 0.586; μ: Nb 0.51; BCC_A2: Nb 0.91	experimental	[1] Sun 2024 cites Vob 2011	Table 4, p. 5, row 12 report
1780.15	eutectic: Liq = Fe7Nb6 + (Nb)	Liq: Nb 0.579; Fe7Nb6: Nb 0.515; (Nb): Nb 0.907	model	[2] He 2017 cites Khvan 2012 doi	Table 3, p. 10, row 14 report
1778.15	eutectic: Liq = Fe7Nb6 + (Nb)	Liq: Nb 0.579; Fe7Nb6: Nb 0.505; (Nb): Nb 0.91	model	[2] He 2017	Table 3, p. 10, row 11 report
1776.15	eutectic: Liq = Fe7Nb6 + (Nb)	Liq: Nb 0.562; Fe7Nb6: Nb 0.506; (Nb): Nb 0.909	model	[2] He 2017 cites Liu 2012 doi	Table 3, p. 10, row 15 report
1774	eutectic: Liquid ↔ μ + BCC_A2	Liquid: Nb 0.583; μ: Nb 0.516; BCC_A2: Nb 0.91	model	[1] Sun 2024	Table 4, p. 5, row 10 report
1773.15	eutectic: Liq = Fe7Nb6 + (Nb)	Liq: Nb 0.59; Fe7Nb6: Nb 0.54; (Nb): Nb 0.93	experimental	[2] He 2017 cites Zelaya 1993	Table 3, p. 10, row 13 report
1773	eutectic: Liquid ↔ μ + BCC_A2	Liquid: Nb 0.59; μ: Nb 0.54; BCC_A2: Nb 0.93	experimental	[1] Sun 2024 cites Bejarano 1993 doi	Table 4, p. 5, row 13 report
1773	eutectic: Liquid ↔ μ + BCC_A2	Liquid: Nb 0.6; μ: Nb 0.505; BCC_A2: Nb 0.892	model	[1] Sun 2024 cites Pan 2023 doi	Table 4, p. 5, row 11 report
1773	eutectic: D85 + bcc#2 <=> Liq.		experimental	[3] Mathon 2009 cites Zelaya 1993	Table 3, p. 13, row 24 report
1771	eutectic: D85 + bcc#2 <=> Liq.		model	[3] Mathon 2009 cites Coelho 1994	Table 3, p. 13, row 23 report
1758	eutectic: D85 + bcc#2 <=> Liq.		model	[3] Mathon 2009 cites Toffolon 2000 doi	Table 3, p. 13, row 22 report
1757	eutectic: D85 + bcc#2 <=> Liq.		model	[3] Mathon 2009	Table 3, p. 13, row 21 report
1673.15	eutectic: L = bcc + l		model	[4] Miettinen 2015 cites Lee 2001 doi	p. 2 report	The eutectic reaction, L = bcc + l, occurs at 1400 °C according to Lee.[7]
1667	eutectic: bcc#1 + C14 <=> Liq.		model	[3] Mathon 2009 cites Toffolon 2000 doi	Table 3, p. 13, row 10 report
1667	eutectic: bcc#1 + C14 <=> Liq.		model	[3] Mathon 2009	Table 3, p. 13, row 9 report
1654	eutectic: Liquid ↔ BCC_A2 + C14	Liquid: Nb 0.089; BCC_A2: Nb 0.026; C14: Nb 0.265	model	[1] Sun 2024 cites Pan 2023 doi	Table 4, p. 5, row 15 report
1650	eutectic: Liquid ↔ BCC_A2 + C14	Liquid: Nb 0.091; BCC_A2: Nb 0.03; C14: Nb 0.269	model	[1] Sun 2024	Table 4, p. 5, row 14 report
1646.15	eutectic: Liq = (αFe) + Fe2Nb	Liq: Nb 0.082; (αFe): Nb 0.032; Fe2Nb: Nb 0.251	experimental	[2] He 2017 cites Vo 2011 doi	Table 3, p. 10, row 17 report
1646	eutectic: bcc#1 + C14 <=> Liq.		model	[3] Mathon 2009 cites Coelho 1994	Table 3, p. 13, row 11 report
1646	eutectic: Liquid ↔ BCC_A2 + C14	Liquid: Nb 0.082; BCC_A2: Nb 0.032; C14: Nb 0.251	experimental	[1] Sun 2024 cites Vob 2011	Table 4, p. 5, row 16 report
1645.15	eutectic: Liq = (αFe) + Fe2Nb	Liq: Nb 0.102; Fe2Nb: Fe 0.666667, Nb 0.333333	experimental	[2] He 2017 cites Gibson 1961	Table 3, p. 10, row 20 report
1645	eutectic: Liquid ↔ BCC_A2 + C14	Liquid: Nb 0.106	experimental	[1] Sun 2024 cites Genders 1939	Table 4, p. 5, row 21 report
1643.15	eutectic: Liq = (αFe) + Fe2Nb	Liq: Nb 0.096; (αFe): Nb 0.032; Fe2Nb: Nb 0.251	model	[2] He 2017 cites Khvan 2012 doi	Table 3, p. 10, row 22 report
1643.15	eutectic: Liq = (αFe) + Fe2Nb	Liq: Nb 0.093; (αFe): Nb 0.034; Fe2Nb: Nb 0.266	model	[2] He 2017	Table 3, p. 10, row 16 report
1643.15	eutectic: Liq = (αFe) + Fe2Nb	Liq: Nb 0.1199; (αFe): Nb 0.0327; Fe2Nb: Fe 0.666667, Nb 0.333333	experimental	[2] He 2017 cites Ferrier 1964	Table 3, p. 10, row 19 report
1643.15	eutectic: Liq = (αFe) + Fe2Nb	Liq: Nb 0.106; (αFe): Nb 0.0327; Fe2Nb: Nb 0.32	experimental	[2] He 2017 cites Zelaya 1993	Table 3, p. 10, row 18 report
1643	eutectic: bcc#1 + C14 <=> Liq.		experimental	[3] Mathon 2009 cites Zelaya 1993	Table 3, p. 13, row 12 report
1643	eutectic: Liquid ↔ BCC_A2 + C14	Liquid: Nb 0.12; BCC_A2: Nb 0.033	experimental	[1] Sun 2024 cites Gibson 1961	Table 4, p. 5, row 20 report
1643	eutectic: Liquid ↔ BCC_A2 + C14	Liquid: Nb 0.106; BCC_A2: Nb 0.033; C14: Nb 0.32	experimental	[1] Sun 2024 cites Bejarano 1993 doi	Table 4, p. 5, row 17 report
1638	eutectic: Liquid ↔ BCC_A2 + C14	Liquid: Nb 0.098	experimental	[1] Sun 2024 cites Goldschmidt 1960	Table 4, p. 5, row 19 report
1635.15	eutectic: Liq = (αFe) + Fe2Nb	Liq: Nb 0.102; (αFe): Nb 0.032; Fe2Nb: Nb 0.249	model	[2] He 2017 cites Liu 2012 doi	Table 3, p. 10, row 23 report
1629	eutectic: Liquid ↔ BCC_A2 + C14	BCC_A2: Nb 0.076; C14: Nb 0.339	experimental	[1] Sun 2024 cites Voronov 1937	Table 4, p. 5, row 18 report
1621.15	eutectic: Liq = (αFe) + Fe2Nb	Liq: Nb 0.1; Fe2Nb: Fe 0.666667, Nb 0.333333	experimental	[2] He 2017 cites Goldschmidt 1960	Table 3, p. 10, row 21 report
1621	eutectic: Liquid ↔ BCC_A2 + C14	Liquid: Nb 0.1	experimental	[1] Sun 2024 cites Paul 1986 doi	Table 4, p. 5, row 22 report
1493.15	eutectoid: (αFe) = (γFe) + Fe2Nb	Fe2Nb: Fe 0.666667, Nb 0.333333	experimental	[2] He 2017 cites Genders 1939	Table 3, p. 10, row 29 report
1493	eutectic: BCC_A2 ↔ FCC_A1 + C14		experimental	[1] Sun 2024 cites Eggers 1938	Table 4, p. 5, row 31 report
1493	eutectic: BCC_A2 ↔ FCC_A1 + C14	BCC_A2: Nb 0.013; FCC_A1: Nb 0.001; C14: Nb 0.339	experimental	[1] Sun 2024 cites Voronov 1937	Table 4, p. 5, row 26 report
1481.15	eutectoid: (αFe) = (γFe) + Fe2Nb	(αFe): Nb 0.017; (γFe): Nb 0.0099; Fe2Nb: Fe 0.666667, Nb 0.333333	experimental	[2] He 2017 cites Ferrier 1964	Table 3, p. 10, row 27 report
1481	eutectic: BCC_A2 ↔ FCC_A1 + C14	BCC_A2: Nb 0.1; FCC_A1: Nb 0.016	experimental	[1] Sun 2024 cites Gibson 1961	Table 4, p. 5, row 28 report
1476	eutectic: BCC_A2 ↔ FCC_A1 + C14	BCC_A2: Nb 0.02; FCC_A1: Nb 0.015; C14: Nb 0.273	model	[1] Sun 2024	Table 4, p. 5, row 23 report
1473.15	eutectoid: (αFe) = (γFe) + Fe2Nb	Fe2Nb: Fe 0.666667, Nb 0.333333	experimental	[2] He 2017 cites Gibson 1961	Table 3, p. 10, row 28 report
1473	eutectic: BCC_A2 ↔ FCC_A1 + C14		experimental	[1] Sun 2024 cites Genders 1939	Table 4, p. 5, row 29 report
1472	eutectoid: fcc + C14 <=> bcc#1		model	[3] Mathon 2009	Table 3, p. 13, row 5 report
1472	eutectoid: fcc + C14 <=> bcc#1		model	[3] Mathon 2009 cites Toffolon 2000 doi	Table 3, p. 13, row 6 report
1466	eutectic: BCC_A2 ↔ FCC_A1 + C14	BCC_A2: Nb 0.015; FCC_A1: Nb 0.009; C14: Nb 0.269	model	[1] Sun 2024 cites Pan 2023 doi	Table 4, p. 5, row 24 report
1463.15	eutectoid: (αFe) = (γFe) + Fe2Nb	(αFe): Nb 0.0156; (γFe): Nb 0.01; Fe2Nb: Nb 0.32	experimental	[2] He 2017 cites Zelaya 1993	Table 3, p. 10, row 26 report
1463	eutectoid: fcc + C14 <=> bcc#1		experimental	[3] Mathon 2009 cites Zelaya 1993	Table 3, p. 13, row 8 report
1463	eutectoid: fcc + C14 <=> bcc#1		model	[3] Mathon 2009 cites Coelho 1994	Table 3, p. 13, row 7 report
1463	eutectic: BCC_A2 ↔ FCC_A1 + C14		experimental	[1] Sun 2024 cites Abrahamson 1966	Table 4, p. 5, row 30 report
1463	eutectic: BCC_A2 ↔ FCC_A1 + C14	BCC_A2: Nb 0.063; FCC_A1: Nb 0.01; C14: Nb 0.32	experimental	[1] Sun 2024 cites Bejarano 1993 doi	Table 4, p. 5, row 27 report
1456.15	eutectoid: (αFe) = (γFe) + Fe2Nb	(αFe): Nb 0.015; (γFe): Nb 0.011; Fe2Nb: Nb 0.265	experimental	[2] He 2017 cites Vo 2011 doi	Table 3, p. 10, row 25 report
1456	eutectic: BCC_A2 ↔ FCC_A1 + C14	BCC_A2: Nb 0.015; FCC_A1: Nb 0.011; C14: Nb 0.265	experimental	[1] Sun 2024 cites Vob 2011	Table 4, p. 5, row 25 report
1454.15	eutectoid: (αFe) = (γFe) + Fe2Nb	(αFe): Nb 0.018; (γFe): Nb 0.012; Fe2Nb: Nb 0.255	model	[2] He 2017 cites Khvan 2012 doi	Table 3, p. 10, row 30 report
1454.15	eutectoid: (αFe) = (γFe) + Fe2Nb	(αFe): Nb 0.017; (γFe): Nb 0.012; Fe2Nb: Nb 0.267	model	[2] He 2017	Table 3, p. 10, row 24 report
1452.15	eutectoid: (αFe) = (γFe) + Fe2Nb	(αFe): Nb 0.017; (γFe): Nb 0.011; Fe2Nb: Nb 0.252	model	[2] He 2017 cites Liu 2012 doi	Table 3, p. 10, row 31 report
1262.15	eutectoid: (γFe) + Fe2Nb = (αFe)	Fe2Nb: Fe 0.666667, Nb 0.333333	experimental	[2] He 2017 cites Genders 1939	Table 3, p. 10, row 35 report
1262	eutectic: FCC_A1 + C14 ↔ BCC_A2		experimental	[1] Sun 2024 cites Eggers 1938	Table 4, p. 5, row 37 report
1238	eutectic: FCC_A1 + C14 ↔ BCC_A2	FCC_A1: Nb 0.005; C14: Nb 0.348; BCC_A2: Nb 0.031	experimental	[1] Sun 2024 cites Voronov 1937	Table 4, p. 5, row 35 report
1233.15	eutectoid: (γFe) + Fe2Nb = (αFe)	(γFe): Nb 0.0043; Fe2Nb: Nb 0.32; (αFe): Nb 0.0073	experimental	[2] He 2017 cites Zelaya 1993	Table 3, p. 10, row 34 report
1233	peritectoid: bcc#1 <=> fcc + C14		experimental	[3] Mathon 2009 cites Zelaya 1993	Table 3, p. 13, row 4 report
1232	peritectoid: bcc#1 <=> fcc + C14		model	[3] Mathon 2009 cites Coelho 1994	Table 3, p. 13, row 3 report
1230	eutectic: FCC_A1 + C14 ↔ BCC_A2	FCC_A1: Nb 0.007; C14: Nb 0.28; BCC_A2: Nb 0.01	model	[1] Sun 2024	Table 4, p. 5, row 32 report
1223	eutectic: FCC_A1 + C14 ↔ BCC_A2	FCC_A1: Nb 0.004; C14: Nb 0.32; BCC_A2: Nb 0.007	experimental	[1] Sun 2024 cites Bejarano 1993 doi	Table 4, p. 5, row 36 report
1223	eutectic: FCC_A1 + C14 ↔ BCC_A2		experimental	[1] Sun 2024 cites Abrahamson 1966	Table 4, p. 5, row 38 report
1222	eutectic: FCC_A1 + C14 ↔ BCC_A2	FCC_A1: Nb 0.003; C14: Nb 0.279; BCC_A2: Nb 0.006	model	[1] Sun 2024 cites Pan 2023 doi	Table 4, p. 5, row 33 report
1217.15	eutectoid: (γFe) + Fe2Nb = (αFe)	(γFe): Nb 0.003; Fe2Nb: Nb 0.2596; (αFe): Nb 0.0054	model	[2] He 2017 cites Liu 2012 doi	Table 3, p. 10, row 37 report
1216.15	eutectoid: (γFe) + Fe2Nb = (αFe)	(γFe): Nb 0.0044; Fe2Nb: Nb 0.263; (αFe): Nb 0.0068	model	[2] He 2017 cites Khvan 2012 doi	Table 3, p. 10, row 36 report
1216.15	eutectoid: (γFe) + Fe2Nb = (αFe)	Fe2Nb: Nb 0.276	experimental	[2] He 2017 cites Vo 2011 doi	Table 3, p. 10, row 33 report
1216	eutectic: FCC_A1 + C14 ↔ BCC_A2	C14: Nb 0.276	experimental	[1] Sun 2024 cites Vob 2011	Table 4, p. 5, row 34 report
1215	peritectoid: bcc#1 <=> fcc + C14		model	[3] Mathon 2009 cites Toffolon 2000 doi	Table 3, p. 13, row 2 report
1215	peritectoid: bcc#1 <=> fcc + C14		model	[3] Mathon 2009	Table 3, p. 13, row 1 report
1212.15	eutectoid: (γFe) + Fe2Nb = (αFe)	(γFe): Nb 0.003; Fe2Nb: Nb 0.27; (αFe): Nb 0.005	model	[2] He 2017	Table 3, p. 10, row 32 report

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, Fe–Nb system (9)
Phase	Value	T (K)	Class	Source	Location
Fe0.6667Nb0.3333	-23.7 kJ/mol (basis unstated)	1200	experimental	[5] Toffolon 2000 cites ref. 69	Table I, p. 2, row 2 report
Fe0.6667Nb0.3333	-23.67 kJ/mol (basis unstated)		model	[5] Toffolon 2000	Table I, p. 2, row 9 report
Fe0.6667Nb0.3333	-23.41 kJ/mol (basis unstated)		model	[5] Toffolon 2000 cites ref. 94	Table I, p. 2, row 8 report
Fe0.6667Nb0.3333	-22.5 kJ/mol (basis unstated)		model	[5] Toffolon 2000 cites ref. 67	Table I, p. 2, row 3 report
Fe0.6667Nb0.3333	-21 kJ/mol (basis unstated)		model	[5] Toffolon 2000 cites ref. 77	Table I, p. 2, row 5 report
Fe0.6667Nb0.3333	-20.5 kJ/mol (basis unstated)	1250	experimental	[5] Toffolon 2000 cites ref. 66	Table I, p. 2, row 1 report
Fe0.6667Nb0.3333	-17.9 kJ/mol (basis unstated)		model	[5] Toffolon 2000 cites ref. 72	Table I, p. 2, row 4 report
Fe0.6667Nb0.3333	-17.87 kJ/mol (basis unstated)		model	[5] Toffolon 2000 cites ref. 90	Table I, p. 2, row 6 report
Fe0.6667Nb0.3333	-12.24 kJ/mol (basis unstated)		model	[5] Toffolon 2000 cites ref. 93	Table I, p. 2, row 7 report

Other properties

Phase transition (4)

Phase transition, Fe–Nb system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1903 K	1903	congruent melting: C14 <=> Liq.	experimental	[3] Mathon 2009 cites Zelaya 1993	Table 3, p. 13, row 16 report
Phase transition	1904 K	1904	congruent melting: C14 <=> Liq.	model	[3] Mathon 2009	Table 3, p. 13, row 13 report
Phase transition	1904 K	1904	congruent melting: C14 <=> Liq.	model	[3] Mathon 2009 cites Toffolon 2000 doi	Table 3, p. 13, row 14 report
Phase transition	1920 K	1920	congruent melting: C14 <=> Liq.	model	[3] Mathon 2009 cites Coelho 1994	Table 3, p. 13, row 15 report

Mixing / partial (2)

Mixing / partial, Fe–Nb system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Entropy of mixing printed: -ΔS measured	-4.56 J/mol (basis unstated)/K	1200	Fe0.6667Nb0.3333 alloy: Nb 0.3333	experimental	[5] Toffolon 2000 cites ref. 69	Table I, p. 2, row 2 report
Entropy of mixing printed: -ΔS measured	-4.6 J/mol (basis unstated)/K	1250	Fe0.6667Nb0.3333 alloy: Nb 0.3333	experimental	[5] Toffolon 2000 cites ref. 66	Table I, p. 2, row 1 report

Heat capacity / entropy / enthalpy (4)

Heat capacity / entropy / enthalpy, Fe–Nb system
Property	Value	Phases / composition	Class	Source	Location
Entropy printed: -ΔS calculated	-5.42 J/mol.at.K	Fe0.6667Nb0.3333 alloy: Nb 0.3333	model	[5] Toffolon 2000	Table I, p. 2, row 9 report
Entropy printed: -ΔS calculated	-1.84 J/mol.at.K	Fe0.6667Nb0.3333 alloy: Nb 0.3333	model	[5] Toffolon 2000 cites ref. 90	Table I, p. 2, row 6 report
Entropy printed: -ΔS calculated	-0.33 J/mol.at.K	Fe0.6667Nb0.3333 alloy: Nb 0.3333	model	[5] Toffolon 2000 cites ref. 93	Table I, p. 2, row 7 report
Entropy printed: -ΔS calculated	-5.33 J/mol.at.K	Fe0.6667Nb0.3333 alloy: Nb 0.3333	model	[5] Toffolon 2000 cites ref. 94	Table I, p. 2, row 8 report

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

Hui Sun, Chuangye Wang, Shun-Li Shang, Allison M. Beese, Ji-Cheng Zhao, Zi-Kui Liu, Thermodynamic modeling of Fe-Nb and Fe-Nb-Ni systems supported by first-principles calculations and diffusion-multiple measurements, Acta Materialia 268, 119747 (2024). doi:10.1016/j.actamat.2024.119747
Cuiyun He, Yuting Qin, Frank Stein, Thermodynamic Assessment of the Fe-Al-Nb System with Updated Fe-Nb Description, J. Phase Equilib. Diffus. 38, 771-787 (2017). doi:10.1007/s11669-017-0566-3
Muriel Mathon, Damien Connétable, Bo Sundman, Jacques Lacaze, Calphad-type assessment of the Fe–Nb–Ni ternary system, Calphad 33, 136-161 (2009). doi:10.1016/j.calphad.2008.10.005
Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P systems. Part 5: Fe-Nb-P, J. Phase Equilib. Diffus. 36, 68-77 (2015). doi:10.1007/s11669-014-0351-5
C. Toffolon, C. Servant, Thermodynamic assessment of the Fe-Nb system, Calphad 24, 97-112 (2000). doi:10.1016/s0364-5916(00)00017-1

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23736065

Also cite the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0). Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

@misc{orchid_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}