Gd–Mn system

41 accepted literature values from 2 paper(s) (experimental 16, model 16, unspecified 9); 2 calculated phase diagram(s). 31 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 (9) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	16
model	16
unspecified	9

Accepted values by property group
Property group	Values
invariant reaction	27
phase transition	5
phase equilibrium	6
formation	3

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
GdMn-01Gro-LB.tdb	J. Groebner, A. Pisch, R. Schmid-Fetzer, J. Alloys Compd., 317-318, 433-37(2001). doi:10.1016/S0925-8388(00)01364-5	`fa6fb054649c9cbcddbadb0b515f50dc63b1bc6894580da7643e8043741fca8c`	viewer · TDB · JSON
GdMn-17Wan.tdb	J. Wang, S. Lin, M. Rong, G. Rao, H. Zhou, J. Therm. Anal. Calorim., 128, 1009-18(2017). doi:10.1007/s10973-016-6000-y	`0be2e68c2ec5f73ace139f898436a3e08c1141fb06c34d8a44ea4294466ee8ac`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GdMn-01Gro-LB.tdb	1507.85	HCP_A3 (x(Mn) 8.000e-4) + BCC_A2 (x(Mn) 8.600e-4) + LIQUID (x(Mn) 0.03869)
GdMn-01Gro-LB.tdb	1410.77	LIQUID (x(Mn) 0.92479) + BCC_A2 (x(Mn) 0.99884) + FCC_A1 (x(Mn) 0.99886)
GdMn-01Gro-LB.tdb	1359.43	LIQUID (x(Mn) 0.88353) + GDMN12_D2B (x(Mn) 0.92308) + FCC_A1 (x(Mn) 0.99847)
GdMn-01Gro-LB.tdb	1359.43	LIQUID (x(Mn) 0.88363) + GDMN12_D2B (x(Mn) 0.92308) + FCC_A1 (x(Mn) 0.99847)
GdMn-01Gro-LB.tdb	1350.22	GDMN12_D2B (x(Mn) 0.92308) + FCC_A1 (x(Mn) 0.99861) + CUB_A13 (x(Mn) 1)
GdMn-01Gro-LB.tdb	1350.22	GDMN12_D2B (x(Mn) 0.92308) + FCC_A1 (x(Mn) 0.99861) + CUB_A13 (x(Mn) 1)
GdMn-01Gro-LB.tdb	1322.97	GD6MN23_D8A (x(Mn) 0.7931) + LIQUID (x(Mn) 0.8027) + GDMN12_D2B (x(Mn) 0.92308)
GdMn-01Gro-LB.tdb	1322.97	GD6MN23_D8A (x(Mn) 0.7931) + LIQUID (x(Mn) 0.80306) + GDMN12_D2B (x(Mn) 0.92308)
GdMn-01Gro-LB.tdb	1322.97	GD6MN23_D8A (x(Mn) 0.7931) + LIQUID (x(Mn) 0.80248) + GDMN12_D2B (x(Mn) 0.92308)
GdMn-01Gro-LB.tdb	1214.69	LIQUID (x(Mn) 0.52296) + GDMN2_C15 (x(Mn) 0.66667) + GD6MN23_D8A (x(Mn) 0.7931)
GdMn-01Gro-LB.tdb	1214.69	LIQUID (x(Mn) 0.52357) + GDMN2_C15 (x(Mn) 0.66667) + GD6MN23_D8A (x(Mn) 0.7931)
GdMn-01Gro-LB.tdb	1100.8	HCP_A3 (x(Mn) 0.00188) + LIQUID (x(Mn) 0.33891) + GDMN2_C15 (x(Mn) 0.66667)
GdMn-01Gro-LB.tdb	980	GDMN12_D2B (x(Mn) 0.92308) + CBCC_A12 (x(Mn) 1) + CUB_A13 (x(Mn) 1)
GdMn-17Wan.tdb	1534.91	HCP_A3 (x(Mn) 2.300e-4) + BCC_A2 (x(Mn) 2.500e-4) + LIQUID (x(Mn) 0.02455)
GdMn-17Wan.tdb	1415.45	LIQUID (x(Mn) 0.93843) + FCC_A1 (x(Mn) 0.99917) + BCC_A2 (x(Mn) 0.99968)
GdMn-17Wan.tdb	1349.76	LIQUID (x(Mn) 0.89852) + FCC_A1 (x(Mn) 0.99854) + CUB_A13 (x(Mn) 1)
GdMn-17Wan.tdb	1349.76	LIQUID (x(Mn) 0.89834) + FCC_A1 (x(Mn) 0.99854) + CUB_A13 (x(Mn) 1)
GdMn-17Wan.tdb	1320.07	LIQUID (x(Mn) 0.8787) + GDMN12_D2B (x(Mn) 0.92308) + CUB_A13 (x(Mn) 1)
GdMn-17Wan.tdb	1320.07	LIQUID (x(Mn) 0.87887) + GDMN12_D2B (x(Mn) 0.92308) + CUB_A13 (x(Mn) 1)
GdMn-17Wan.tdb	1320.07	LIQUID (x(Mn) 0.87882) + GDMN12_D2B (x(Mn) 0.92308) + CUB_A13 (x(Mn) 1)
GdMn-17Wan.tdb	1313.89	GD6MN23_D8A (x(Mn) 0.7931) + LIQUID (x(Mn) 0.86723) + GDMN12_D2B (x(Mn) 0.92308)
GdMn-17Wan.tdb	1313.89	GD6MN23_D8A (x(Mn) 0.7931) + LIQUID (x(Mn) 0.86749) + GDMN12_D2B (x(Mn) 0.92308)
GdMn-17Wan.tdb	1313.89	GD6MN23_D8A (x(Mn) 0.7931) + LIQUID (x(Mn) 0.86718) + GDMN12_D2B (x(Mn) 0.92308)
GdMn-17Wan.tdb	1278.13	LIQUID (x(Mn) 0.64746) + GDMN2_C15 (x(Mn) 0.66667) + GD6MN23_D8A (x(Mn) 0.7931)
GdMn-17Wan.tdb	1278.13	LIQUID (x(Mn) 0.64792) + GDMN2_C15 (x(Mn) 0.66667) + GD6MN23_D8A (x(Mn) 0.7931)
GdMn-17Wan.tdb	1092.68	HCP_A3 (x(Mn) 0.00125) + LIQUID (x(Mn) 0.33152) + GDMN2_C15 (x(Mn) 0.66667)
GdMn-17Wan.tdb	980	GDMN12_D2B (x(Mn) 0.92308) + CBCC_A12 (x(Mn) 1) + CUB_A13 (x(Mn) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull GdMn-01Gro-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Gd–Mn system (27)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1530.1	peritectic: L + β-Gd ↔ α-Gd	L: Mn 0.027	unspecified	[1] Wang 2017	Table 3, p. 6, row 19 report
1501	peritectic: L + β-Gd ↔ α-Gd		model	[1] Wang 2017 cites Kim 2013 doi	Table 3, p. 6, row 18 report
1407	peritectic: L + δ-Mn ↔ γ-Mn		model	[1] Wang 2017 cites Grobner 2001 doi	Table 3, p. 6, row 21 report
1400.6	peritectic: L + δ-Mn ↔ γ-Mn	L: Mn 0.93	unspecified	[1] Wang 2017	Table 3, p. 6, row 23 report
1400	peritectic: L + δ-Mn ↔ γ-Mn		model	[1] Wang 2017 cites Kim 2013 doi	Table 3, p. 6, row 22 report
1398	peritectic: L + δ-Mn ↔ γ-Mn		experimental	[1] Wang 2017 cites Kirchmayr 1967 doi	Table 3, p. 6, row 20 report
1360	peritectic: L + γ-Mn ↔ β-Mn	β-Mn: Mn 1	model	[1] Wang 2017 cites Kim 2013 doi	Table 3, p. 6, row 24 report
1358	peritectic: L + β-Mn ↔ Mn12Gd	L: Mn 0.887; β-Mn: Mn 1; Mn12Gd: Mn 0.923077	model	[1] Wang 2017 cites Grobner 2001 doi	Table 3, p. 6, row 15 report
1358	peritectic: L + β-Mn ↔ Mn12Gd	L: Mn 0.89; β-Mn: Mn 1; Mn12Gd: Mn 0.923077	experimental	[1] Wang 2017 cites Kirchmayr 1967 doi	Table 3, p. 6, row 14 report
1357.6	peritectic: L + γ-Mn ↔ β-Mn	L: Mn 0.904; β-Mn: Mn 1	unspecified	[1] Wang 2017	Table 3, p. 6, row 25 report
1325	eutectic: L ↔ Mn23Gd6 + Mn12Gd	L: Mn 0.795; Mn23Gd6: Mn 0.793103; Mn12Gd: Mn 0.923077	model	[1] Wang 2017 cites Grobner 2001 doi	Table 3, p. 6, row 10 report
1320	peritectic: L + β-Mn ↔ Mn12Gd	β-Mn: Mn 1; Mn12Gd: Mn 0.923077	model	[1] Wang 2017 cites Kim 2013 doi	Table 3, p. 6, row 16 report
1320	peritectic: L + β-Mn ↔ Mn12Gd	L: Mn 0.879; β-Mn: Mn 1; Mn12Gd: Mn 0.923077	unspecified	[1] Wang 2017	Table 3, p. 6, row 17 report
1313.8	eutectic: L ↔ Mn23Gd6 + Mn12Gd	L: Mn 0.867; Mn23Gd6: Mn 0.793103; Mn12Gd: Mn 0.923077	unspecified	[1] Wang 2017	Table 3, p. 6, row 13 report
1313.1	eutectic: L ↔ Mn23Gd6 + Mn12Gd	Mn23Gd6: Mn 0.793103; Mn12Gd: Mn 0.923077	experimental	[1] Wang 2017	Table 3, p. 6, row 12 report
1311	eutectic: L ↔ Mn23Gd6 + Mn12Gd	Mn23Gd6: Mn 0.793103; Mn12Gd: Mn 0.923077	model	[1] Wang 2017 cites Kim 2013 doi	Table 3, p. 6, row 11 report
1278	peritectic: L + Mn23Gd6 ↔ Mn2Gd	L: Mn 0.647; Mn23Gd6: Mn 0.793103; Mn2Gd: Mn 0.666667	unspecified	[1] Wang 2017	Table 3, p. 6, row 9 report
1277.9	peritectic: L + Mn23Gd6 ↔ Mn2Gd	Mn23Gd6: Mn 0.793103; Mn2Gd: Mn 0.666667	experimental	[1] Wang 2017	Table 3, p. 6, row 8 report
1223	peritectic: L + Mn23Gd6 ↔ Mn2Gd	L: Mn 0.52; Mn23Gd6: Mn 0.793103; Mn2Gd: Mn 0.666667	experimental	[1] Wang 2017 cites Kirchmayr 1967 doi	Table 3, p. 6, row 6 report
1214	peritectic: L + Mn23Gd6 ↔ Mn2Gd	L: Mn 0.527; Mn23Gd6: Mn 0.793103; Mn2Gd: Mn 0.666667	model	[1] Wang 2017 cites Grobner 2001 doi	Table 3, p. 6, row 7 report
1103	eutectic: L ↔ α-Gd + Mn2Gd	L: Mn 0.353; Mn2Gd: Mn 0.666667	experimental	[1] Wang 2017 cites Kirchmayr 1967 doi	Table 3, p. 6, row 1 report
1101	eutectic: L ↔ α-Gd + Mn2Gd	L: Mn 0.338; Mn2Gd: Mn 0.666667	model	[1] Wang 2017 cites Grobner 2001 doi	Table 3, p. 6, row 2 report
1093	eutectic: L ↔ α-Gd + Mn2Gd	Mn2Gd: Mn 0.666667	experimental	[1] Wang 2017	Table 3, p. 6, row 4 report
1092.2	eutectic: L ↔ α-Gd + Mn2Gd	L: Mn 0.331; Mn2Gd: Mn 0.666667	unspecified	[1] Wang 2017	Table 3, p. 6, row 5 report
1086	eutectic: L ↔ α-Gd + Mn2Gd	Mn2Gd: Mn 0.666667	model	[1] Wang 2017 cites Kim 2013 doi	Table 3, p. 6, row 3 report
980	peritectoid: Mn12Gd + β-Mn ↔ α-Mn	Mn12Gd: Mn 0.923077; β-Mn: Mn 1; α-Mn: Mn 1	unspecified	[1] Wang 2017	Table 3, p. 6, row 29 report
980	peritectoid: Mn12Gd + β-Mn ↔ α-Mn	Mn12Gd: Mn 0.923077; β-Mn: Mn 1; α-Mn: Mn 1	model	[1] Wang 2017 cites Grobner 2001 doi	Table 3, p. 6, row 28 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, Gd–Mn system (3)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Mn12Gd	GdMn12	-4 kJ/mol-atom	298.15	model	2.068 (mp-aaabkkpg)	1.557 (oqmd-5135)	[2] Gröbner 2001	Table 2, p. 3, row 2 report
Mn23Gd6	Gd6Mn23	-6.4 kJ/mol-atom	298.15	model	89.384 (mp-aaacpzik)	12.168 (oqmd-30388)	[2] Gröbner 2001	Table 2, p. 3, row 2 report
Mn2Gd	GdMn2	-6.4 kJ/mol-atom	298.15	model	21.064 (mp-aaacjhct)	9.268 (oqmd-19430)	[2] Gröbner 2001	Table 2, p. 3, row 2 report

Other properties

Phase transition (5)

Phase transition, Gd–Mn system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	105 K	105	magnetic	experimental	[1] Wang 2017 cites Marcos 2004 doi	p. 2 report	The magnetic transformation temperature of Mn2Gd was reported to be 105 K [24].
Phase transition	1283.95 K	1283.95	peritectic: Mn70Gd30 (as-cast) alloy: Gd 0.3, Mn 0.7	experimental	[1] Wang 2017	Table 1, p. 3, row 15 report
Phase transition	1313.1 K	1313.1	eutectic: Mn80Gd20 alloy: Gd 0.2, Mn 0.8	experimental	[1] Wang 2017	Table 1, p. 3, row 19 report
Phase transition	1329 K	1329	congruent melting: L ↔ Mn23Gd6 L: Mn 0.793103; Mn23Gd6: Mn 0.793103	model	[1] Wang 2017 cites Kim 2013 doi	Table 3, p. 6, row 26 report
Phase transition	1340 K	1340	congruent melting: L ↔ Mn23Gd6 L: Mn 0.793103; Mn23Gd6: Mn 0.793103	unspecified	[1] Wang 2017	Table 3, p. 6, row 27 report

Phase equilibrium (6)

Phase equilibrium, Gd–Mn system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	1226.92	other: Mn50Gd50 liquid: Gd 0.5, Mn 0.5	experimental	[1] Wang 2017	Table 1, p. 3, row 8 report
Phase composition	1229.95	other: Mn55Gd45 liquid: Gd 0.45, Mn 0.55	experimental	[1] Wang 2017	Table 1, p. 3, row 10 report
Phase composition	1248.38	other: Mn60Gd40 liquid: Gd 0.4, Mn 0.6	experimental	[1] Wang 2017	Table 1, p. 3, row 12 report
Phase composition	1333.72	other: Mn70Gd30 (as-cast) liquid: Gd 0.3, Mn 0.7	experimental	[1] Wang 2017	Table 1, p. 3, row 16 report
Phase composition	1337.54	other: Mn75Gd25 liquid: Gd 0.25, Mn 0.75	experimental	[1] Wang 2017	Table 1, p. 3, row 18 report
Phase composition	1340.37	other: Mn80Gd20 liquid: Gd 0.2, Mn 0.8	experimental	[1] Wang 2017	Table 1, p. 3, row 20 report

Sources

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

Jiang Wang, Shidong Lin, Maohua Rong, Guanghui Rao, Huaiying Zhou, Experimental investigation and thermodynamic re-assessment of the Mn–Gd binary system, J Therm Anal Calorim 128, 1009-1018 (2017). doi:10.1007/s10973-016-6000-y
J. Gröbner, A. Pisch, R. Schmid-Fetzer, Thermodynamic optimization of the systems Mn–Gd and Mn–Y using new experimental results, Journal of Alloys and Compounds 317-318, 433-437 (2001). doi:10.1016/s0925-8388(00)01364-5

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}
}