Fe–Gd system

144 accepted literature values from 3 paper(s) (experimental 91, model 53); 6 calculated phase diagram(s). 4 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 (11) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	91
model	53

Accepted values by property group
Property group	Values
invariant reaction	68
phase transition	31
formation	32
heat capacity / entropy / enthalpy	13

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
FeGd-00Zin.tdb	M. Zinkevich, N. Mattern, H.J. Seifert, J. Phase Equilib., 21, 385-94(2000). doi:10.1361/105497100770339923	`c29d3c3fbef2ea498c8f2bc5a446fecf1db4447031f412115fe98c20a6acba00`	viewer · TDB · JSON
FeGd-02Zin-newGd.tdb	M. Zinkevich, N. Mattern, H.J. Seifert, E. Gmelin, Scand. J. Metall., 31, 34-51(2002). doi:10.1034/j.1600-0692.2002.311310106.x	`f16780fed3b16558b12ee6c19617ba96201090f474c350de3b4cfd1702a25370`	viewer · TDB · JSON
FeGd-02Zin.tdb	M. Zinkevich, N. Mattern, H.J. Seifert, E. Gmelin, Scand. J. Metall., 31, 34-51(2002). doi:10.1034/j.1600-0692.2002.311310106.x	`ccf919e5867bc08854e2f8fb2aa49318846e006edf9230a325558f5bb21dd04b`	viewer · TDB · JSON
FeGd-12Wan.tdb	W. Wang, C. Guo, C. Li, Z. Du, J. Rare Earths, 30, 1055-63(2012). doi:10.1016/S1002-0721(12)60178-1	`f83f09ebff484a468faeba12436a4e4a1b3fa0e84e71b0ae2851fb73d8262db9`	viewer · TDB · JSON
FeGd-17Che.tdb	X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). doi:10.1016/j.calphad.2017.07.005	`6eae73757a5ee767c2857d2e8d25bb4ba443843a36b84f939d8ebbfb199bc2ad`	viewer · TDB · JSON
FeGd-95Liu.tdb	Z.-K. Liu, W. Zhang, B. Sundman, J. Alloys Compd. 226, 33-45(1995). doi:10.1016/0925-8388(95)01578-7	`5d743908ff00aa1ff55cd38d2a312c79f61b6c98268648803a8c3d476453a747`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
FeGd-00Zin.tdb	1652.62	FCC_A1 (x(Gd) 0.00593) + BCC_A2 (x(Gd) 0.00647) + LIQUID (x(Gd) 0.09306)
FeGd-00Zin.tdb	1608.09	FCC_A1 (x(Gd) 0.00716) + FE17GD2_HT (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12396)
FeGd-00Zin.tdb	1608.09	FCC_A1 (x(Gd) 0.00716) + FE17GD2_HT (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12395)
FeGd-00Zin.tdb	1553.25	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.21482)
FeGd-00Zin.tdb	1553.25	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.21521)
FeGd-00Zin.tdb	1553.25	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.21434)
FeGd-00Zin.tdb	1532.24	LIQUID (x(Gd) 0.97057) + BCC_A2 (x(Gd) 0.99741) + HCP_A3 (x(Gd) 0.99794)
FeGd-00Zin.tdb	1488.35	FE17GD2_HT (x(Gd) 0.10526) + FE17GD2_LT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069)
FeGd-00Zin.tdb	1488.35	FCC_A1 (x(Gd) 0.00596) + FE17GD2_LT (x(Gd) 0.10526) + FE17GD2_HT (x(Gd) 0.10526)
FeGd-00Zin.tdb	1488.35	FCC_A1 (x(Gd) 0.00595) + FE17GD2_HT (x(Gd) 0.10526) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-00Zin.tdb	1431.51	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47435)
FeGd-00Zin.tdb	1431.51	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47434)
FeGd-00Zin.tdb	1431.51	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47463)
FeGd-00Zin.tdb	1431.51	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47464)
FeGd-00Zin.tdb	1356.64	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.55946)
FeGd-00Zin.tdb	1356.64	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.55956)
FeGd-00Zin.tdb	1204.93	FCC_A1 (x(Gd) 0.00151) + BCC_A2 (x(Gd) 0.00314) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-00Zin.tdb	1204.93	FCC_A1 (x(Gd) 0.0015) + BCC_A2 (x(Gd) 0.00312) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-00Zin.tdb	1104.16	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.71374) + HCP_A3 (x(Gd) 0.99622)
FeGd-00Zin.tdb	1104.16	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.71365) + HCP_A3 (x(Gd) 0.99622)
FeGd-00Zin.tdb	474.36	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333)
FeGd-02Zin-newGd.tdb	1651.54	FCC_A1 (x(Gd) 0.00595) + BCC_A2 (x(Gd) 0.00654) + LIQUID (x(Gd) 0.09361)
FeGd-02Zin-newGd.tdb	1607.5	FCC_A1 (x(Gd) 0.00716) + FE17GD2_HT (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12422)
FeGd-02Zin-newGd.tdb	1607.5	FCC_A1 (x(Gd) 0.00716) + FE17GD2_HT (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12419)
FeGd-02Zin-newGd.tdb	1551.48	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6 (x(Gd) 0.2069) + LIQUID (x(Gd) 0.21558)
FeGd-02Zin-newGd.tdb	1551.48	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6 (x(Gd) 0.2069) + LIQUID (x(Gd) 0.21612)
FeGd-02Zin-newGd.tdb	1551.48	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6 (x(Gd) 0.2069) + LIQUID (x(Gd) 0.21648)
FeGd-02Zin-newGd.tdb	1503.3	LIQUID (x(Gd) 0.95571) + BCC_A2 (x(Gd) 0.99636) + HCP_A3 (x(Gd) 0.99729)
FeGd-02Zin-newGd.tdb	1488.24	FE17GD2_HT (x(Gd) 0.10526) + FE17GD2_LT (x(Gd) 0.10526) + FE23GD6 (x(Gd) 0.2069)
FeGd-02Zin-newGd.tdb	1488.24	FCC_A1 (x(Gd) 0.00596) + FE17GD2_LT (x(Gd) 0.10526) + FE17GD2_HT (x(Gd) 0.10526)
FeGd-02Zin-newGd.tdb	1488.24	FCC_A1 (x(Gd) 0.00596) + FE17GD2_HT (x(Gd) 0.10526) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-02Zin-newGd.tdb	1428.77	FE23GD6 (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47426)
FeGd-02Zin-newGd.tdb	1428.77	FE23GD6 (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47414)
FeGd-02Zin-newGd.tdb	1428.77	FE23GD6 (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47454)
FeGd-02Zin-newGd.tdb	1428.77	FE23GD6 (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47455)
FeGd-02Zin-newGd.tdb	1346.36	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.56431)
FeGd-02Zin-newGd.tdb	1346.36	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.56406)
FeGd-02Zin-newGd.tdb	1346.36	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.56438)
FeGd-02Zin-newGd.tdb	1205.51	FCC_A1 (x(Gd) 0.00151) + BCC_A2 (x(Gd) 0.00317) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-02Zin-newGd.tdb	1205.5	FCC_A1 (x(Gd) 0.00152) + BCC_A2 (x(Gd) 0.00318) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-02Zin-newGd.tdb	1087.34	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.72565) + HCP_A3 (x(Gd) 0.99682)
FeGd-02Zin-newGd.tdb	1087.34	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.72555) + HCP_A3 (x(Gd) 0.99682)
FeGd-02Zin.tdb	1652.52	FCC_A1 (x(Gd) 0.00595) + BCC_A2 (x(Gd) 0.0065) + LIQUID (x(Gd) 0.09297)
FeGd-02Zin.tdb	1608.6	FCC_A1 (x(Gd) 0.00717) + FE17GD2_HT (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12347)
FeGd-02Zin.tdb	1608.6	FCC_A1 (x(Gd) 0.00717) + FE17GD2_HT (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12344)
FeGd-02Zin.tdb	1553	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.21474)
FeGd-02Zin.tdb	1552.99	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.21541)
FeGd-02Zin.tdb	1552.99	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.21577)
FeGd-02Zin.tdb	1532.23	LIQUID (x(Gd) 0.97057) + BCC_A2 (x(Gd) 0.99741) + HCP_A3 (x(Gd) 0.99794)
FeGd-02Zin.tdb	1488.24	FE17GD2_HT (x(Gd) 0.10526) + FE17GD2_LT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069)
FeGd-02Zin.tdb	1488.24	FCC_A1 (x(Gd) 0.00596) + FE17GD2_LT (x(Gd) 0.10526) + FE17GD2_HT (x(Gd) 0.10526)
FeGd-02Zin.tdb	1488.24	FCC_A1 (x(Gd) 0.00596) + FE17GD2_HT (x(Gd) 0.10526) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-02Zin.tdb	1433.33	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47093)
FeGd-02Zin.tdb	1433.33	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47081)
FeGd-02Zin.tdb	1433.33	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47132)
FeGd-02Zin.tdb	1433.33	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47094)
FeGd-02Zin.tdb	1350.98	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.56267)
FeGd-02Zin.tdb	1350.98	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.56231)
FeGd-02Zin.tdb	1350.98	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.56275)
FeGd-02Zin.tdb	1205	FCC_A1 (x(Gd) 0.00151) + BCC_A2 (x(Gd) 0.00314) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-02Zin.tdb	1205	FCC_A1 (x(Gd) 0.0015) + BCC_A2 (x(Gd) 0.00313) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-02Zin.tdb	1104.33	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.72212) + HCP_A3 (x(Gd) 0.99648)
FeGd-02Zin.tdb	1104.33	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.72203) + HCP_A3 (x(Gd) 0.99648)
FeGd-12Wan.tdb	1653	FCC_A1 (x(Gd) 0.0081) + BCC_A2 (x(Gd) 0.00836) + LIQUID (x(Gd) 0.0919)
FeGd-12Wan.tdb	1603.93	FCC_A1 (x(Gd) 0.00999) + FE17GD2 (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12295)
FeGd-12Wan.tdb	1603.93	FCC_A1 (x(Gd) 0.00998) + FE17GD2 (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12282)
FeGd-12Wan.tdb	1556.03	FE17GD2 (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.23748)
FeGd-12Wan.tdb	1556.03	FE17GD2 (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.23778)
FeGd-12Wan.tdb	1556.03	FE17GD2 (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.23721)
FeGd-12Wan.tdb	1508	LIQUID (x(Gd) 0.96313) + BCC_A2 (x(Gd) 0.99997) + HCP_A3 (x(Gd) 1)
FeGd-12Wan.tdb	1470.3	FE23GD6_D8A (x(Gd) 0.2069) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.43305)
FeGd-12Wan.tdb	1470.3	FE23GD6_D8A (x(Gd) 0.2069) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.43406)
FeGd-12Wan.tdb	1470.3	FE23GD6_D8A (x(Gd) 0.2069) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.43407)
FeGd-12Wan.tdb	1470.29	FE23GD6_D8A (x(Gd) 0.2069) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.43368)
FeGd-12Wan.tdb	1288.38	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333)
FeGd-12Wan.tdb	1201.16	FCC_A1 (x(Gd) 3.000e-4) + BCC_A2 (x(Gd) 0.0016) + FE17GD2 (x(Gd) 0.10526)
FeGd-12Wan.tdb	1201.16	FCC_A1 (x(Gd) 3.000e-4) + BCC_A2 (x(Gd) 0.00159) + FE17GD2 (x(Gd) 0.10526)
FeGd-12Wan.tdb	1117.06	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.7439) + HCP_A3 (x(Gd) 1)
FeGd-12Wan.tdb	1117.06	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.74391) + HCP_A3 (x(Gd) 1)
FeGd-12Wan.tdb	1117.06	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.74403) + HCP_A3 (x(Gd) 1)
FeGd-17Che.tdb	1656.5	FCC_A1 (x(Gd) 0.00914) + BCC_A2 (x(Gd) 0.00958) + LIQUID (x(Gd) 0.09723)
FeGd-17Che.tdb	1603.92	FCC_A1 (x(Gd) 0.01105) + FE17GD2_HT (x(Gd) 0.10526) + LIQUID (x(Gd) 0.13355)
FeGd-17Che.tdb	1603.92	FCC_A1 (x(Gd) 0.01105) + FE17GD2_HT (x(Gd) 0.10526) + LIQUID (x(Gd) 0.1335)
FeGd-17Che.tdb	1556.2	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.24434)
FeGd-17Che.tdb	1556.2	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.24436)
FeGd-17Che.tdb	1556.2	FE17GD2_HT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.24475)
FeGd-17Che.tdb	1534.14	LIQUID (x(Gd) 0.97452) + BCC_A2 (x(Gd) 0.99881) + HCP_A3 (x(Gd) 0.99898)
FeGd-17Che.tdb	1482.48	FE17GD2_HT (x(Gd) 0.10526) + FE17GD2_LT (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069)
FeGd-17Che.tdb	1482.48	FCC_A1 (x(Gd) 0.00467) + FE17GD2_LT (x(Gd) 0.10526) + FE17GD2_HT (x(Gd) 0.10526)
FeGd-17Che.tdb	1482.48	FCC_A1 (x(Gd) 0.00466) + FE17GD2_HT (x(Gd) 0.10526) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-17Che.tdb	1427.6	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.4721)
FeGd-17Che.tdb	1427.6	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47203)
FeGd-17Che.tdb	1427.6	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.47242)
FeGd-17Che.tdb	1354.47	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.54581)
FeGd-17Che.tdb	1354.47	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.54563)
FeGd-17Che.tdb	1354.47	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.54587)
FeGd-17Che.tdb	1184.15	BCC_A2 (x(Gd) 2.600e-4) + FCC_A1 (x(Gd) 3.200e-4) + FE17GD2_LT (x(Gd) 0.10526)
FeGd-17Che.tdb	1105.04	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.72023) + HCP_A3 (x(Gd) 0.99025)
FeGd-95Liu.tdb	1653.99	FCC_A1 (x(Gd) 0.00762) + BCC_A2 (x(Gd) 0.00814) + LIQUID (x(Gd) 0.08981)
FeGd-95Liu.tdb	1603.94	FCC_A1 (x(Gd) 0.00944) + FE17GD2 (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12088)
FeGd-95Liu.tdb	1603.94	FCC_A1 (x(Gd) 0.00944) + FE17GD2 (x(Gd) 0.10526) + LIQUID (x(Gd) 0.12078)
FeGd-95Liu.tdb	1551.63	FE17GD2 (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.2418)
FeGd-95Liu.tdb	1551.63	FE17GD2 (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.24161)
FeGd-95Liu.tdb	1551.63	FE17GD2 (x(Gd) 0.10526) + FE23GD6_D8A (x(Gd) 0.2069) + LIQUID (x(Gd) 0.24188)
FeGd-95Liu.tdb	1512.97	LIQUID (x(Gd) 0.96058) + BCC_A2 (x(Gd) 0.99575) + HCP_A3 (x(Gd) 0.99999)
FeGd-95Liu.tdb	1512.97	LIQUID (x(Gd) 0.96056) + BCC_A2 (x(Gd) 0.99575) + HCP_A3 (x(Gd) 0.99999)
FeGd-95Liu.tdb	1427.41	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.48125)
FeGd-95Liu.tdb	1427.41	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.48083)
FeGd-95Liu.tdb	1427.41	FE23GD6_D8A (x(Gd) 0.2069) + FE3GD (x(Gd) 0.25) + LIQUID (x(Gd) 0.48136)
FeGd-95Liu.tdb	1351.7	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.56599)
FeGd-95Liu.tdb	1351.7	FE3GD (x(Gd) 0.25) + FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.56626)
FeGd-95Liu.tdb	1197.71	FCC_A1 (x(Gd) 2.700e-4) + BCC_A2 (x(Gd) 0.00133) + FE17GD2 (x(Gd) 0.10526)
FeGd-95Liu.tdb	1197.71	FCC_A1 (x(Gd) 2.700e-4) + BCC_A2 (x(Gd) 0.00133) + FE17GD2 (x(Gd) 0.10526)
FeGd-95Liu.tdb	1106.78	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.73529) + HCP_A3 (x(Gd) 1)
FeGd-95Liu.tdb	1106.78	FE2GD_C15 (x(Gd) 0.33333) + LIQUID (x(Gd) 0.73516) + HCP_A3 (x(Gd) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull FeGd-00Zin · CALPHAD hull FeGd-02Zin-newGd · CALPHAD hull FeGd-02Zin · CALPHAD hull FeGd-12Wan · CALPHAD hull FeGd-95Liu

Invariant reactions (literature)

Invariant reactions reported in the literature for the Fe–Gd system (68)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1661	b.c.c. -> f.c.c. + liq.		experimental	[1] Liu 1995 cites Copeland 1962	Table 3, p. 4, row 3 report
1653	metatectic/catatectic: δFe <=> liquid + γFe	δFe: Gd 0.0064; liquid: Gd 0.093; γFe: Gd 0.0059	model	[2] Zinkevich 2002	Table 2, p. 3, row 4 report
1653	b.c.c. -> f.c.c. + liq.		experimental	[1] Liu 1995 cites ref. 27	Table 3, p. 4, row 2 report
1653	metatectic/catatectic: δFe <=> liquid + γFe	liquid: Gd 0.09	model	[2] Zinkevich 2002 cites Liu 1995 doi	Table 2, p. 3, row 3 report
1653	metatectic/catatectic: δFe <=> liquid + γFe	δFe: Gd 0.008; liquid: Gd 0.15; γFe: Gd 0.006	experimental	[2] Zinkevich 2002 cites Savitskii 1969	Table 2, p. 3, row 2 report
1653	b.c.c. -> f.c.c. + liq.	L: Gd 0.09	model	[1] Liu 1995	Table 3, p. 4, row 1 report
1653	δFe <-> Liquid + γFe	δFe: Gd 0.008; Liquid: Gd 0.15; γFe: Gd 0.006	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 2 report
1646	δFe <-> Liquid + γFe	δFe: Gd 0.016; Liquid: Gd 0.16; γFe: Gd 0.005	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 1 report
1646	metatectic/catatectic: δFe <=> liquid + γFe	δFe: Gd 0.016; liquid: Gd 0.16; γFe: Gd 0.005	experimental	[2] Zinkevich 2002 cites Savitskii 1961	Table 2, p. 3, row 1 report
1608	peritectic: liquid + γFe <=> Fe17Gd2(H)	liquid: Gd 0.124; γFe: Gd 0.0072; Fe17Gd2(H): Gd 0.105263	model	[2] Zinkevich 2002	Table 2, p. 3, row 11 report
1608	liq. + f.c.c. -> Fe17Gd2	Fe17Gd2: Gd 0.105263	experimental	[1] Liu 1995 cites ref. 27	Table 3, p. 4, row 5 report
1608	peritectic: liquid + γFe <=> Fe17Gd2(H)	liquid: Gd 0.19; γFe: Gd 0.009; Fe17Gd2(H): Gd 0.105263	experimental	[2] Zinkevich 2002 cites Savitskii 1961	Table 2, p. 3, row 8 report
1608	Liquid + γFe <-> Fe17Gd2	Liquid: Gd 0.17; γFe: Gd 0.006; Fe17Gd2: Gd 0.105	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 5 report
1608	peritectic: liquid + γFe <=> Fe17Gd2(H)	liquid: Gd 0.17; γFe: Gd 0.006; Fe17Gd2(H): Gd 0.105263	experimental	[2] Zinkevich 2002 cites Savitskii 1969	Table 2, p. 3, row 9 report
1608	Liquid + γFe <-> Fe17Gd2	Liquid: Gd 0.19; γFe: Gd 0.009; Fe17Gd2: Gd 0.105	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 4 report
1604	liq. + f.c.c. -> Fe17Gd2	L: Gd 0.119; Fe17Gd2: Gd 0.105263	model	[1] Liu 1995	Table 3, p. 4, row 4 report
1604	peritectic: liquid + γFe <=> Fe17Gd2(H)	liquid: Gd 0.119; Fe17Gd2(H): Gd 0.105263	model	[2] Zinkevich 2002 cites Liu 1995 doi	Table 2, p. 3, row 10 report
1593	liq. + f.c.c. -> Fe17Gd2	Fe17Gd2: Gd 0.105263	experimental	[1] Liu 1995 cites Copeland 1962	Table 3, p. 4, row 6 report
1587	liq. + f.c.c. -> Fe17Gd2	Fe17Gd2: Gd 0.105263	experimental	[1] Liu 1995 cites Spedding 1961	Table 3, p. 4, row 7 report
1556	liq. + Fe17Gd2 -> Fe23Gd6	L: Gd 0.234; Fe17Gd2: Gd 0.105263; Fe23Gd6: Gd 0.206897	model	[1] Liu 1995	Table 3, p. 4, row 8 report
1556	peritectic: liquid + Fe17Gd2(H) <=> Fe23Gd6	liquid: Gd 0.234; Fe17Gd2(H): Gd 0.105263; Fe23Gd6: Gd 0.206897	model	[2] Zinkevich 2002 cites Liu 1995 doi	Table 2, p. 3, row 13 report
1553	Liquid + Fe17Gd2 <-> Fe23Gd6	Liquid: Gd 0.27; Fe17Gd2: Gd 0.105; Fe23Gd6: Gd 0.207	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 6 report
1553	peritectic: liquid + Fe17Gd2(H) <=> Fe23Gd6	liquid: Gd 0.27; Fe17Gd2(H): Gd 0.105263; Fe23Gd6: Gd 0.206897	experimental	[2] Zinkevich 2002 cites Savitskii 1969	Table 2, p. 3, row 12 report
1553	liq. + Fe17Gd2 -> Fe23Gd6	Fe17Gd2: Gd 0.105263; Fe23Gd6: Gd 0.206897	experimental	[1] Liu 1995 cites ref. 27	Table 3, p. 4, row 9 report
1552	peritectic: liquid + Fe17Gd2(H) <=> Fe23Gd6	liquid: Gd 0.216; Fe17Gd2(H): Gd 0.105263; Fe23Gd6: Gd 0.206897	model	[2] Zinkevich 2002	Table 2, p. 3, row 14 report
1532	metatectic/catatectic: βGd <=> liquid + αGd	βGd: Gd 0.995; liquid: Gd 0.95; αGd: Gd 0.995	experimental	[2] Zinkevich 2002 cites Savitskii 1969	Table 2, p. 3, row 28 report
1532	βGd <-> Liquid + αGd	βGd: Gd 0.995; Liquid: Gd 0.95; αGd: Gd 0.995	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 14 report
1512	b.c.c. -> h.c.p. + liq.	b.c.c.: Gd 0.9956; L: Gd 0.96	model	[1] Liu 1995	Table 3, p. 4, row 21 report
1512	metatectic/catatectic: βGd <=> liquid + αGd	βGd: Gd 0.9956; liquid: Gd 0.96	model	[2] Zinkevich 2002 cites Liu 1995 doi	Table 2, p. 3, row 29 report
1505	metatectic/catatectic: βGd <=> liquid + αGd	βGd: Gd 0.9994; liquid: Gd 0.96; αGd: Gd 0.9999	model	[2] Zinkevich 2002	Table 2, p. 3, row 30 report
1446	liq. + Fe23Gd6 -> Fe3Gd	Fe23Gd6: Gd 0.206897; Fe3Gd: Gd 0.25	experimental	[1] Liu 1995 cites Spedding 1961	Table 3, p. 4, row 13 report
1433	Liquid + Fe23Gd6 <-> Fe3Gd	Liquid: Gd 0.47; Fe23Gd6: Gd 0.207; Fe3Gd: Gd 0.25	experimental	[3] Zinkevich 2000 cites Novy 1961	Table 1, p. 2, row 8 report
1433	peritectic: liquid + Fe23Gd6 <=> Fe3Gd	liquid: Gd 0.472; Fe23Gd6: Gd 0.206897; Fe3Gd: Gd 0.25	model	[2] Zinkevich 2002	Table 2, p. 3, row 18 report
1433	liq. + Fe23Gd6 -> Fe3Gd	Fe23Gd6: Gd 0.206897; Fe3Gd: Gd 0.25	experimental	[1] Liu 1995 cites ref. 27	Table 3, p. 4, row 11 report
1433	Liquid + Fe23Gd6 <-> Fe3Gd	Liquid: Gd 0.41; Fe23Gd6: Gd 0.207; Fe3Gd: Gd 0.25	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 7 report
1433	peritectic: liquid + Fe23Gd6 <=> Fe3Gd	liquid: Gd 0.47; Fe23Gd6: Gd 0.206897; Fe3Gd: Gd 0.25	experimental	[2] Zinkevich 2002 cites Novy 1961	Table 2, p. 3, row 16 report
1433	peritectic: liquid + Fe23Gd6 <=> Fe3Gd	liquid: Gd 0.41; Fe23Gd6: Gd 0.206897; Fe3Gd: Gd 0.25	experimental	[2] Zinkevich 2002 cites Savitskii 1969	Table 2, p. 3, row 15 report
1429	liq. + Fe23Gd6 -> Fe3Gd	L: Gd 0.477; Fe23Gd6: Gd 0.206897; Fe3Gd: Gd 0.25	model	[1] Liu 1995	Table 3, p. 4, row 10 report
1429	peritectic: liquid + Fe23Gd6 <=> Fe3Gd	liquid: Gd 0.477; Fe23Gd6: Gd 0.206897; Fe3Gd: Gd 0.25	model	[2] Zinkevich 2002 cites Liu 1995 doi	Table 2, p. 3, row 17 report
1423	liq. + Fe23Gd6 -> Fe3Gd	Fe23Gd6: Gd 0.206897; Fe3Gd: Gd 0.25	experimental	[1] Liu 1995 cites Copeland 1962	Table 3, p. 4, row 12 report
1355	liq. + Fe3Gd -> Fe2Gd	L: Gd 0.56; Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333333	model	[1] Liu 1995	Table 3, p. 4, row 14 report
1355	peritectic: liquid + Fe3Gd <=> Fe2Gd	liquid: Gd 0.56; Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333333	model	[2] Zinkevich 2002 cites Liu 1995 doi	Table 2, p. 3, row 22 report
1353	peritectic: liquid + Fe3Gd <=> Fe2Gd	liquid: Gd 0.564; Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333333	model	[2] Zinkevich 2002	Table 2, p. 3, row 23 report
1353	liq. + Fe3Gd -> Fe2Gd	Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333333	experimental	[1] Liu 1995 cites Copeland 1962	Table 3, p. 4, row 16 report
1353	peritectic: liquid + Fe3Gd <=> Fe2Gd	liquid: Gd 0.56; Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333333	experimental	[2] Zinkevich 2002 cites Savitskii 1961	Table 2, p. 3, row 19 report
1353	liq. + Fe3Gd -> Fe2Gd	Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333333	experimental	[1] Liu 1995 cites ref. 27	Table 3, p. 4, row 15 report
1353	Liquid + Fe3Gd <-> Fe2Gd	Liquid: Gd 0.56; Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 9 report
1353	peritectic: liquid + Fe3Gd <=> Fe2Gd	liquid: Gd 0.58; Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333333	experimental	[2] Zinkevich 2002 cites Savitskii 1969	Table 2, p. 3, row 20 report
1353	Liquid + Fe3Gd <-> Fe2Gd	Liquid: Gd 0.58; Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 10 report
1334	liq. + Fe3Gd -> Fe2Gd	Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333333	experimental	[1] Liu 1995 cites Spedding 1961	Table 3, p. 4, row 17 report
1323	peritectic: liquid + Fe3Gd <=> Fe2Gd	liquid: Gd 0.55; Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333333	experimental	[2] Zinkevich 2002 cites Novy 1961	Table 2, p. 3, row 21 report
1323	Liquid + Fe3Gd <-> Fe2Gd	Liquid: Gd 0.55; Fe3Gd: Gd 0.25; Fe2Gd: Gd 0.333	experimental	[3] Zinkevich 2000 cites Novy 1961	Table 1, p. 2, row 11 report
1205	f.c.c. + Fe17Gd2 -> b.c.c.	Fe17Gd2: Gd 0.105263	experimental	[1] Liu 1995 cites ref. 27	Table 3, p. 4, row 23 report
1205	peritectoid: γFe + Fe17Gd2(R) <=> αFe	γFe: Gd 0.005; Fe17Gd2(R): Gd 0.105263; αFe: Gd 0.007	experimental	[2] Zinkevich 2002 cites Savitskii 1961	Table 2, p. 3, row 5 report
1205	peritectoid: γFe + Fe17Gd2(R) <=> αFe	γFe: Gd 0.0015; Fe17Gd2(R): Gd 0.105263; αFe: Gd 0.0031	model	[2] Zinkevich 2002	Table 2, p. 3, row 7 report
1205	γFe + Fe17Gd2 <-> αFe	γFe: Gd 0.005; Fe17Gd2: Gd 0.105; αFe: Gd 0.007	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 3 report
1197	peritectoid: γFe + Fe17Gd2(R) <=> αFe	γFe: Gd 0.002; Fe17Gd2(R): Gd 0.105263; αFe: Gd 2.760e-4	model	[2] Zinkevich 2002 cites Liu 1995 doi	Table 2, p. 3, row 6 report
1197	f.c.c. + Fe17Gd2 -> b.c.c.	f.c.c.: Gd 0.001283; Fe17Gd2: Gd 0.105263; b.c.c.: Gd 2.760e-4	model	[1] Liu 1995	Table 3, p. 4, row 22 report
1183	f.c.c. + Fe17Gd2 -> b.c.c.	Fe17Gd2: Gd 0.105263	experimental	[1] Liu 1995 cites Copeland 1962	Table 3, p. 4, row 24 report
1133	eutectic: liquid <=> Fe2Gd + αGd	liquid: Gd 0.7; Fe2Gd: Gd 0.333333	experimental	[2] Zinkevich 2002 cites Novy 1961	Table 2, p. 3, row 25 report
1133	Liquid <-> Fe2Gd + αGd	Liquid: Gd 0.7; Fe2Gd: Gd 0.333; αGd: Gd 1	experimental	[3] Zinkevich 2000 cites Novy 1961	Table 1, p. 2, row 13 report
1118	eutectic: liq. -> Fe2Gd + h.c.p.	Fe2Gd: Gd 0.333333	experimental	[1] Liu 1995 cites Copeland 1962	Table 3, p. 4, row 20 report
1105	eutectic: liquid <=> Fe2Gd + αGd	liquid: Gd 0.736; Fe2Gd: Gd 0.333333	model	[2] Zinkevich 2002 cites Liu 1995 doi	Table 2, p. 3, row 26 report
1105	eutectic: liq. -> Fe2Gd + h.c.p.	L: Gd 0.736; Fe2Gd: Gd 0.333333	model	[1] Liu 1995	Table 3, p. 4, row 18 report
1103	eutectic: liq. -> Fe2Gd + h.c.p.	Fe2Gd: Gd 0.333333	experimental	[1] Liu 1995 cites ref. 27	Table 3, p. 4, row 19 report
1103	Liquid <-> Fe2Gd + αGd	Liquid: Gd 0.72; Fe2Gd: Gd 0.333; αGd: Gd 0.999	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 12 report
1103	eutectic: liquid <=> Fe2Gd + αGd	liquid: Gd 0.726; Fe2Gd: Gd 0.333333; αGd: Gd 1	model	[2] Zinkevich 2002	Table 2, p. 3, row 27 report
1103	eutectic: liquid <=> Fe2Gd + αGd	liquid: Gd 0.72; Fe2Gd: Gd 0.333333; αGd: Gd 0.999	experimental	[2] Zinkevich 2002 cites Savitskii 1961	Table 2, p. 3, row 24 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–Gd system (32)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Fe17Gd2	Fe17Gd2	-2.3 kJ/mol-atom ± 1.6	298.15	experimental	-0.552 (mp-aaacqckz)	-0.034 (oqmd-89232)	[3] Zinkevich 2000 cites Colinet 1987 doi	Table 2, p. 3, row 4 report
Fe17Gd2(R)		-4.34 per mol-atom	298.15	model			[2] Zinkevich 2002	Table 12, p. 13, row 3 report
Fe17Gd2(R)	Fe17Gd2	-4.34 kJ/mol-atom	298.15	model	-0.552 (mp-aaacqckz)	-0.034 (oqmd-89232)	[2] Zinkevich 2002	Table 12, p. 13, row 3 report
Fe17Gd2(R)		-3.65 per mol-atom	298.15	model			[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 2 report
Fe17Gd2(R)	Fe17Gd2	-3.65 kJ/mol-atom	298.15	model	-0.552 (mp-aaacqckz)	-0.034 (oqmd-89232)	[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 2 report
Fe17Gd2(R)		-2.3 per mol-atom ± 1.6	298.15	experimental			[2] Zinkevich 2002 cites Colinet 1987	Table 12, p. 13, row 1 report
Fe17Gd2(R)	Fe17Gd2	-2.3 kJ/mol-atom ± 1.6	298.15	experimental	-0.552 (mp-aaacqckz)	-0.034 (oqmd-89232)	[2] Zinkevich 2002 cites Colinet 1987	Table 12, p. 13, row 1 report
Fe23Gd6		-6.44 per mol-atom	298.15	model			[2] Zinkevich 2002	Table 12, p. 13, row 5 report
Fe23Gd6	Fe23Gd6	-6.44 kJ/mol-atom	298.15	model	119.903 (mp-aaacpzco)	-1.306 (oqmd-30181)	[2] Zinkevich 2002	Table 12, p. 13, row 5 report
Fe23Gd6		-4.74 per mol-atom	298.15	model			[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 4 report
Fe23Gd6	Fe23Gd6	-4.74 kJ/mol-atom	298.15	model	119.903 (mp-aaacpzco)	-1.306 (oqmd-30181)	[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 4 report
Fe2Gd	Fe2Gd	-11.6 kJ/mol-atom ± 2	298.15	experimental	1.566 (mp-aaaabdsr)	-3.181 (oqmd-18836)	[2] Zinkevich 2002 cites Colinet 1987	Table 12, p. 13, row 9 report
Fe2Gd		-11.6 per mol-atom ± 2	298.15	experimental			[2] Zinkevich 2002 cites Colinet 1987	Table 12, p. 13, row 9 report
Fe2Gd	Fe2Gd	-11.6 kJ/mol-atom ± 2	298.15	experimental	1.566 (mp-aaaabdsr)	-3.181 (oqmd-18836)	[3] Zinkevich 2000 cites Colinet 1987 doi	Table 2, p. 3, row 2 report
Fe2Gd	Fe2Gd	-6.81 kJ/mol-atom	1078	model	1.566 (mp-aaaabdsr)	-3.181 (oqmd-18836)	[2] Zinkevich 2002	Table 12, p. 13, row 14 report
Fe2Gd		-6.81 per mol-atom	1078	model			[2] Zinkevich 2002	Table 12, p. 13, row 14 report
Fe2Gd		-5.94 per mol-atom	298.15	model			[2] Zinkevich 2002	Table 12, p. 13, row 11 report
Fe2Gd	Fe2Gd	-5.94 kJ/mol-atom	298.15	model	1.566 (mp-aaaabdsr)	-3.181 (oqmd-18836)	[2] Zinkevich 2002	Table 12, p. 13, row 11 report
Fe2Gd	Fe2Gd	-4.59 kJ/mol-atom	298.15	model	1.566 (mp-aaaabdsr)	-3.181 (oqmd-18836)	[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 10 report
Fe2Gd		-4.59 per mol-atom	298.15	model			[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 10 report
Fe2Gd	Fe2Gd	-4.38 kJ/mol-atom	1078	model	1.566 (mp-aaaabdsr)	-3.181 (oqmd-18836)	[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 13 report
Fe2Gd		-4.38 per mol-atom	1078	model			[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 13 report
Fe2Gd	Fe2Gd	-3.5 kJ/mol-atom ± 1.5	1078	experimental	1.566 (mp-aaaabdsr)	-3.181 (oqmd-18836)	[2] Zinkevich 2002 cites Deodhar 1975	Table 12, p. 13, row 12 report
Fe2Gd		-3.5 per mol-atom ± 1.5	1078	experimental			[2] Zinkevich 2002 cites Deodhar 1975	Table 12, p. 13, row 12 report
Fe2Gd	Fe2Gd	-3.5 kJ/mol-atom ± 1.5	1078	experimental	1.566 (mp-aaaabdsr)	-3.181 (oqmd-18836)	[3] Zinkevich 2000 cites Deodhar 1975	Table 2, p. 3, row 1 report
Fe3Gd	Fe3Gd	-9.3 kJ/mol-atom ± 1.9	298.15	experimental		-3.613 (oqmd-30182)	[3] Zinkevich 2000 cites Colinet 1987 doi	Table 2, p. 3, row 3 report
Fe3Gd		-9.3 per mol-atom ± 1.9	298.15	experimental			[2] Zinkevich 2002 cites Colinet 1987	Table 12, p. 13, row 6 report
Fe3Gd	Fe3Gd	-9.3 kJ/mol-atom ± 1.9	298.15	experimental		-3.613 (oqmd-30182)	[2] Zinkevich 2002 cites Colinet 1987	Table 12, p. 13, row 6 report
Fe3Gd		-7.78 per mol-atom	298.15	model			[2] Zinkevich 2002	Table 12, p. 13, row 8 report
Fe3Gd	Fe3Gd	-7.78 kJ/mol-atom	298.15	model		-3.613 (oqmd-30182)	[2] Zinkevich 2002	Table 12, p. 13, row 8 report
Fe3Gd	Fe3Gd	-4.93 kJ/mol-atom	298.15	model		-3.613 (oqmd-30182)	[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 7 report
Fe3Gd		-4.93 per mol-atom	298.15	model			[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 7 report

Other properties

Phase transition (31)

Phase transition, Fe–Gd system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	468 K	468	magnetic: Fe23Gd6 alloy: Gd 0.206897	experimental	[1] Liu 1995	Table 4, p. 4, row 3 report
Phase transition	472 K	472	magnetic: Fe17Gd2 alloy: Gd 0.105263	experimental	[1] Liu 1995	Table 4, p. 4, row 4 report
Phase transition	728 K	728	magnetic: Fe3Gd alloy: Gd 0.25	experimental	[1] Liu 1995	Table 4, p. 4, row 2 report
Phase transition	782 K	782	magnetic: Fe2Gd alloy: Gd 0.333333	experimental	[1] Liu 1995	Table 4, p. 4, row 1 report
Phase transition	973 K	973	αFe + Fe17Gd2 αFe: Gd 0; Fe17Gd2: Gd 0.105	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 38 report
Phase transition	973 K	973	αGd + Fe2Gd αGd: Gd 0.994; Fe2Gd: Gd 0.333	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 39 report
Phase transition	1164 K	1164	Liquid + αGd Liquid: Gd 0.75; αGd: Gd 1	experimental	[3] Zinkevich 2000 cites Novy 1961	Table 1, p. 2, row 36 report
Phase transition	1187 K	1187	Liquid + Fe2Gd Liquid: Gd 0.64; Fe2Gd: Gd 0.333	experimental	[3] Zinkevich 2000 cites Novy 1961	Table 1, p. 2, row 35 report
Phase transition	1187 K	1187	γFe + αFe γFe: Gd 0.001; αFe: Gd 0.002	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 27 report
Phase transition	1193 K	1193	γFe + αFe γFe: Gd 0.002; αFe: Gd 0.003	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 28 report
Phase transition	1332 K	1332	Liquid + Fe3Gd Liquid: Gd 0.55; Fe3Gd: Gd 0.25	experimental	[3] Zinkevich 2000 cites Novy 1961	Table 1, p. 2, row 33 report
Phase transition	1348 K	1348	Liquid + Fe2Gd Liquid: Gd 0.579; Fe2Gd: Gd 0.333	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 34 report
Phase transition	1424 K	1424	Liquid + Fe17Gd2 Liquid: Gd 0.453; Fe17Gd2: Gd 0.105	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 31 report
Phase transition	1464 K	1464	Liquid + Fe17Gd2 Liquid: Gd 0.403; Fe17Gd2: Gd 0.105	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 30 report
Phase transition	1482 K	1482	Liquid + αGd Liquid: Gd 0.93; αGd: Gd 1	experimental	[3] Zinkevich 2000 cites Novy 1961	Table 1, p. 2, row 37 report
Phase transition	1488 K	1488	Fe17Gd2 (r) + Fe17Gd2 (h) Fe17Gd2 (r): Gd 0.105; Fe17Gd2 (h): Gd 0.105	experimental	[3] Zinkevich 2000 cites Atiq 1990 doi	Table 1, p. 2, row 32 report
Phase transition	1488 K	1488	polymorphic: Fe17Gd2(H) <=> Fe17Gd2(R) Fe17Gd2(H): Gd 0.105263; Fe17Gd2(R): Gd 0.105263	experimental	[2] Zinkevich 2002 cites Atiq 1990	Table 2, p. 3, row 31 report
Phase transition	1488 K	1488	polymorphic: Fe17Gd2(H) <=> Fe17Gd2(R) Fe17Gd2(H): Gd 0.105263; Fe17Gd2(R): Gd 0.105263	model	[2] Zinkevich 2002	Table 2, p. 3, row 32 report
Phase transition	1494 K	1494	Liquid + Fe17Gd2 Liquid: Gd 0.343; Fe17Gd2: Gd 0.105	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 29 report
Phase transition	1663 K	1663	δFe + γFe δFe: Gd 0.018; γFe: Gd 0.007	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 26 report
Phase transition	1681 K	1681	Liquid + δFe Liquid: Gd 0.135; δFe: Gd 0.013	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 19 report
Phase transition	1681 K	1681	δFe + γFe δFe: Gd 0.016; γFe: Gd 0.003	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 25 report
Phase transition	1701 K	1701	Liquid + δFe Liquid: Gd 0.127; δFe: Gd 0.016	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 24 report
Phase transition	1732 K	1732	Liquid + δFe Liquid: Gd 0.089; δFe: Gd 0.005	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 18 report
Phase transition	1744 K	1744	Liquid + δFe Liquid: Gd 0.085; δFe: Gd 0.011	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 23 report
Phase transition	1747 K	1747	Liquid + δFe Liquid: Gd 0.042; δFe: Gd 0.011	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 22 report
Phase transition	1770 K	1770	Liquid + δFe Liquid: Gd 0.024; δFe: Gd 0.008	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 21 report
Phase transition	1777 K	1777	Liquid + δFe Liquid: Gd 0.042; δFe: Gd 0.003	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 17 report
Phase transition	1780 K	1780	Liquid + δFe Liquid: Gd 0.008; δFe: Gd 0.001	experimental	[3] Zinkevich 2000 cites Savitskii 1970	Table 1, p. 2, row 20 report
Phase transition	1792 K	1792	Liquid + δFe Liquid: Gd 0.007; δFe: Gd 0.007	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 15 report
Phase transition	1797 K	1797	Liquid + δFe Liquid: Gd 0.022; δFe: Gd 0.001	experimental	[3] Zinkevich 2000 cites Savitskii 1961	Table 1, p. 2, row 16 report

Heat capacity / entropy / enthalpy (13)

Heat capacity / entropy / enthalpy, Fe–Gd system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy printed: °ST	38.6 per mol-atom ± 0.5	298.15	Fe2Gd alloy: Gd 0.333333	experimental	[2] Zinkevich 2002 cites Germano 1981	Table 12, p. 13, row 15 report
Entropy printed: °ST	38.6 J/mol-atom/K ± 0.5	298.15	Fe2Gd alloy: Gd 0.333333	experimental	[2] Zinkevich 2002 cites Germano 1981	Table 12, p. 13, row 15 report
Entropy printed: S°	38.63 J/mol-atom/K ± 0.5	298.15	Fe2Gd alloy: Fe 0.667, Gd 0.333	experimental	[3] Zinkevich 2000 cites Germano 1981 doi	Table 2, p. 3, row 6 report
Entropy printed: °ST	38.58 per mol-atom	298.15	Fe2Gd alloy: Gd 0.333333	model	[2] Zinkevich 2002	Table 12, p. 13, row 17 report
Entropy printed: °ST	38.58 J/mol-atom/K	298.15	Fe2Gd alloy: Gd 0.333333	model	[2] Zinkevich 2002	Table 12, p. 13, row 17 report
Entropy printed: °ST	38.62 J/mol-atom/K	298.15	Fe2Gd alloy: Gd 0.333333	model	[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 16 report
Entropy printed: °ST	38.62 per mol-atom	298.15	Fe2Gd alloy: Gd 0.333333	model	[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 16 report
Heat capacity printed: CP	29.18 J/mol-atom/K	298.15	Fe2Gd alloy: Gd 0.333333	model	[2] Zinkevich 2002	Table 12, p. 13, row 20 report
Heat capacity printed: CP	29.18 per mol-atom	298.15	Fe2Gd alloy: Gd 0.333333	model	[2] Zinkevich 2002	Table 12, p. 13, row 20 report
Heat capacity printed: CP	27.8 per mol-atom	298.15	Fe2Gd alloy: Gd 0.333333	model	[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 19 report
Heat capacity printed: CP	27.8 J/mol-atom/K	298.15	Fe2Gd alloy: Gd 0.333333	model	[2] Zinkevich 2002 cites Zinkevich 2000	Table 12, p. 13, row 19 report
Heat capacity printed: CP	29.2 J/mol-atom/K ± 0.5	298.15	Fe2Gd alloy: Gd 0.333333	experimental	[2] Zinkevich 2002 cites Germano 1981	Table 12, p. 13, row 18 report
Heat capacity printed: CP	29.2 per mol-atom ± 0.5	298.15	Fe2Gd alloy: Gd 0.333333	experimental	[2] Zinkevich 2002 cites Germano 1981	Table 12, p. 13, row 18 report

Sources

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

Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). doi:10.1016/0925-8388(95)01578-7
Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). doi:10.1034/j.1600-0692.2002.311310106.x
M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). doi:10.1361/105497100770339923

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}
}