Cr–Mn system

15 accepted literature values from 4 paper(s) (experimental 6, model 8, DFT 1); 3 calculated phase diagram(s). 6 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	6
model	8
DFT	1

Accepted values by property group
Property group	Values
invariant reaction	8
phase transition	1
mixing / partial	1
activity / EMF / Gibbs energy	5

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
CrMn-93Lee-LB.tdb	B.-J. Lee, Metall. Trans. A, 24, 1919-33(1993). doi:10.1007/BF02666327	`7ab2301989a7597034a44d35c10b8c08cb8a8964527284552c451e512596eb71`	viewer · TDB · JSON
CrMn-93Lee-mod.tdb	B.-J. Lee, Metall. Trans. A, 24, 1919-33(1993). doi:10.1007/BF02666327	`4dc8f2c0c78c08a0215078034625a4c08a11f51be3d91e45d403f7f0f3ecea69`	viewer · TDB · JSON
CrMn-93Lee-mod2.tdb	B.-J. Lee, Metall. Trans. A, 24, 1919-33(1993). doi:10.1007/BF02666327	`fb463c59c8fc41e29844cf4f5856b24d6458d5e68c584b99a80aa83b94e5a6f1`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CrMn-93Lee-LB.tdb	1598.43	BCC_A2 (x(Mn) 0.71719) + HIGH_SIGMA (x(Mn) 0.75545) + LIQUID (x(Mn) 0.81288)
CrMn-93Lee-LB.tdb	1556.24	HIGH_SIGMA (x(Mn) 0.79436) + BCC_A2 (x(Mn) 0.83134) + LIQUID (x(Mn) 0.87622)
CrMn-93Lee-LB.tdb	1508.44	FCC_A1 (x(Mn) 1) + LIQUID (x(Mn) 1) + BCC_A2 (x(Mn) 1)
CrMn-93Lee-LB.tdb	1382.07	BCC_A2 (x(Mn) 0.98972) + CUB_A13 (x(Mn) 0.99025) + FCC_A1 (x(Mn) 0.99319)
CrMn-93Lee-LB.tdb	1293.56	HIGH_SIGMA (x(Mn) 0.81716) + BCC_A2 (x(Mn) 0.87316) + CUB_A13 (x(Mn) 0.9133)
CrMn-93Lee-LB.tdb	1268.14	BCC_A2 (x(Mn) 0.68276) + HIGH_SIGMA (x(Mn) 0.75818) + SIGMA_OLD (x(Mn) 0.75972)
CrMn-93Lee-LB.tdb	1266.33	BCC_A2 (x(Mn) 0.67884) + SIGMA_D8B (x(Mn) 0.75383) + SIGMA_OLD (x(Mn) 0.75845)
CrMn-93Lee-LB.tdb	1264.44	SIGMA_OLD (x(Mn) 0.81114) + HIGH_SIGMA (x(Mn) 0.81525) + CUB_A13 (x(Mn) 0.91005)
CrMn-93Lee-LB.tdb	1193.81	BCC_A2 (x(Mn) 0.55712) + CR3MN5 (x(Mn) 0.625) + SIGMA_D8B (x(Mn) 0.70217)
CrMn-93Lee-LB.tdb	1193.81	BCC_A2 (x(Mn) 0.55702) + CR3MN5 (x(Mn) 0.625) + SIGMA_D8B (x(Mn) 0.70213)
CrMn-93Lee-LB.tdb	1078.82	SIGMA_OLD (x(Mn) 0.81216) + CBCC_A12 (x(Mn) 0.92058) + CUB_A13 (x(Mn) 0.93938)
CrMn-93Lee-LB.tdb	830.75	SIGMA_D8B (x(Mn) 0.7859) + SIGMA_OLD (x(Mn) 0.78772) + CBCC_A12 (x(Mn) 0.92157)
CrMn-93Lee-LB.tdb	342.67	SIGMA_D8B (x(Mn) 0.74732) + SIGMA_OLD (x(Mn) 0.74934) + CBCC_A12 (x(Mn) 0.94024)
CrMn-93Lee-mod.tdb	1598.47	BCC_A2 (x(Mn) 0.71709) + HIGH_SIGMA (x(Mn) 0.7575) + LIQUID (x(Mn) 0.81283)
CrMn-93Lee-mod.tdb	1556.21	HIGH_SIGMA (x(Mn) 0.79217) + BCC_A2 (x(Mn) 0.83144) + LIQUID (x(Mn) 0.87628)
CrMn-93Lee-mod.tdb	1508.44	FCC_A1 (x(Mn) 1) + LIQUID (x(Mn) 1) + BCC_A2 (x(Mn) 1)
CrMn-93Lee-mod.tdb	1382.07	BCC_A2 (x(Mn) 0.98972) + CUB_A13 (x(Mn) 0.99025) + FCC_A1 (x(Mn) 0.99319)
CrMn-93Lee-mod.tdb	1294.6	HIGH_SIGMA (x(Mn) 0.81442) + BCC_A2 (x(Mn) 0.87406) + CUB_A13 (x(Mn) 0.9137)
CrMn-93Lee-mod.tdb	1267.64	BCC_A2 (x(Mn) 0.6783) + SIGMA_D8B (x(Mn) 0.75768) + HIGH_SIGMA (x(Mn) 0.76089)
CrMn-93Lee-mod.tdb	1264.29	SIGMA_D8B (x(Mn) 0.81155) + HIGH_SIGMA (x(Mn) 0.81268) + CUB_A13 (x(Mn) 0.91052)
CrMn-93Lee-mod.tdb	1197.64	BCC_A2 (x(Mn) 0.56984) + CR3MN5 (x(Mn) 0.625) + SIGMA_D8B (x(Mn) 0.71923)
CrMn-93Lee-mod.tdb	1186.63	CR3MN5 (x(Mn) 0.625) + SIGMA_OLD (x(Mn) 0.71925) + SIGMA_D8B (x(Mn) 0.71944)
CrMn-93Lee-mod.tdb	1142.36	SIGMA_OLD (x(Mn) 0.81222) + SIGMA_D8B (x(Mn) 0.81258) + CUB_A13 (x(Mn) 0.93027)
CrMn-93Lee-mod.tdb	1078.82	SIGMA_OLD (x(Mn) 0.81216) + CBCC_A12 (x(Mn) 0.92058) + CUB_A13 (x(Mn) 0.93938)
CrMn-93Lee-mod2.tdb	1508.44	FCC_A1 (x(Mn) 1) + LIQUID (x(Mn) 1) + BCC_A2 (x(Mn) 1)
CrMn-93Lee-mod2.tdb	1382.07	BCC_A2 (x(Mn) 0.98972) + CUB_A13 (x(Mn) 0.99025) + FCC_A1 (x(Mn) 0.99319)
CrMn-93Lee-mod2.tdb	1278.5	SIGMA_D8B (x(Mn) 0.81129) + BCC_A2 (x(Mn) 0.86057) + CUB_A13 (x(Mn) 0.90792)
CrMn-93Lee-mod2.tdb	1197.64	BCC_A2 (x(Mn) 0.56984) + CR3MN5 (x(Mn) 0.625) + SIGMA_D8B (x(Mn) 0.71923)
CrMn-93Lee-mod2.tdb	1186.63	CR3MN5 (x(Mn) 0.625) + SIGMA_OLD (x(Mn) 0.71925) + SIGMA_D8B (x(Mn) 0.71944)
CrMn-93Lee-mod2.tdb	1186.63	CR3MN5 (x(Mn) 0.625) + SIGMA_OLD (x(Mn) 0.71905) + SIGMA_D8B (x(Mn) 0.71923)
CrMn-93Lee-mod2.tdb	1142.36	SIGMA_OLD (x(Mn) 0.81222) + SIGMA_D8B (x(Mn) 0.81258) + CUB_A13 (x(Mn) 0.93027)
CrMn-93Lee-mod2.tdb	1142.36	SIGMA_OLD (x(Mn) 0.81222) + SIGMA_D8B (x(Mn) 0.81258) + CUB_A13 (x(Mn) 0.93028)
CrMn-93Lee-mod2.tdb	1078.82	SIGMA_OLD (x(Mn) 0.81216) + CBCC_A12 (x(Mn) 0.92058) + CUB_A13 (x(Mn) 0.93938)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CrMn-93Lee-mod · CALPHAD hull CrMn-93Lee-mod2

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cr–Mn system (8)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1598.4	peritectic: Liquid + bcc-A2 -> σ-H	L: Mn 0.813; bcc-A2: Mn 0.717; σ-H: Mn 0.755	model	[1] (ed.) 1998	Table I, p. 163, row 3 report
1556.2	peritectic: Liquid + σ-H -> bcc-A2	L: Mn 0.876; σ-H: Mn 0.794; bcc-A2: Mn 0.831	model	[1] (ed.) 1998	Table I, p. 163, row 4 report
1382.1	peritectoid: bcc-A2 + fcc-A1 -> cub-A13	bcc-A2: Mn 0.898; fcc-A1: Mn 0.993; cub-A13: Mn 0.913	model	[1] (ed.) 1998	Table I, p. 163, row 6 report
1293.6	eutectoid: bcc-A2 -> cub-A13 + σ-H	bcc-A2: Mn 0.88; cub-A13: Mn 0.873; σ-H: Mn 0.894	model	[1] (ed.) 1998	Table I, p. 163, row 5 report
1268.1	eutectoid: σ-H -> bcc-A2 + σ-L	σ-H: Mn 0.758; bcc-A2: Mn 0.683; σ-L: Mn 0.76	model	[1] (ed.) 1998	Table I, p. 163, row 2 report
1264.4	eutectoid: σ-H -> σ-L + cub-A13	σ-H: Mn 0.815; σ-L: Mn 0.811; cub-A13: Mn 0.91	model	[1] (ed.) 1998	Table I, p. 163, row 7 report
1197.8	peritectoid: bcc-A2 + σ-L -> Cr3Mn5	bcc-A2: Mn 0.57; σ-L: Mn 0.719; Cr3Mn5: Mn 0.625	model	[1] (ed.) 1998	Table I, p. 163, row 1 report
1117.4	peritectoid: σ-L + cub-A13 -> cbcc-A12	σ-L: Mn 0.812; cub-A13: Mn 0.934; cbcc-A12: Mn 0.91	model	[1] (ed.) 1998	Table I, p. 163, row 8 report

Other properties

Phase transition (1)

Phase transition, Cr–Mn system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1073.15 K	1073.15	other	experimental	[2] Lee 1993	p. 3 report	Wachtel and Bartelt also reported another transformation in the sigma phase at about 800 ~

Mixing / partial (1)

Mixing / partial, Cr–Mn system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Enthalpy of mixing printed: ΔmixH^SQS	-4.128 kJ/mol-atom		fcc alloy: Cr 0.5, Mn 0.5	DFT	[3] Bracq 2021	Table 1, p. 4, row 6 report

Activity / EMF / Gibbs energy (5)

Activity / EMF / Gibbs energy, Cr–Mn system
Property	Value	T (K)	Class	Source	Location	Quote
Gibbs energy printed: ΔfG(MnCr2O4)	-50.7 kJ	1773	experimental	[4] Kjellqvist 2010 cites Barin 1993	p. 4 report	-54.4 kJ [41] and -35.6 kJ [42] at 1873 K and -50.7 kJ [38], -53.6 kJ [41] and -34.8 kJ [42] at 1773 K.
Gibbs energy printed: ΔfG(MnCr2O4)	-53.6 kJ	1773	experimental	[4] Kjellqvist 2010 cites Kubaschewski 1993	p. 4 report	-54.4 kJ [41] and -35.6 kJ [42] at 1873 K and -50.7 kJ [38], -53.6 kJ [41] and -34.8 kJ [42] at 1773 K.
Gibbs energy printed: ΔfG(MnCr2O4)	-34.8 kJ	1773	experimental	[4] Kjellqvist 2010 cites Dimitrov 1995 doi	p. 4 report	-54.4 kJ [41] and -35.6 kJ [42] at 1873 K and -50.7 kJ [38], -53.6 kJ [41] and -34.8 kJ [42] at 1773 K.
Gibbs energy printed: ΔfG(MnCr2O4)	-35.6 kJ	1873	experimental	[4] Kjellqvist 2010 cites Dimitrov 1995 doi	p. 4 report	-54.4 kJ [41] and -35.6 kJ [42] at 1873 K and -50.7 kJ [38], -53.6 kJ [41] and -34.8 kJ [42] at 1773 K.
Gibbs energy printed: ΔfG(MnCr2O4)	-54.4 kJ	1873	experimental	[4] Kjellqvist 2010 cites Kubaschewski 1993	p. 4 report	-54.4 kJ [41] and -35.6 kJ [42] at 1873 K and -50.7 kJ [38], -53.6 kJ [41] and -34.8 kJ [42] at 1773 K.

Sources

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

I. Ansara, A. T. Dinsdale, M. H. Rand (eds.), COST 507: Thermochemical database for light metal alloys, Volume 2, EUR 18499 EN, Office for Official Publications of the European Communities, Luxembourg (1998), ISBN 92-828-3902-8.
Byeong-Joo Lee, A Thermodynamic Evaluation of the Cr-Mn and Fe-Cr-Mn Systems, Metall Trans A 24, 1919-1933 (1993). doi:10.1007/bf02666327
Guillaume Bracq, Jean-Claude Crivello, Mathilde Laurent-Brocq, Jean-Marc Joubert, Ivan Guillot, What is the Enthalpy Contribution to the Stabilization of the Co–Cr–Fe–Mn–Ni Faced-centered Cubic Solid Solution?, J. Phase Equilib. Diffus. 42, 561-570 (2021). doi:10.1007/s11669-021-00922-9
Lina Kjellqvist, Malin Selleby, Thermodynamic assessment of the Cr–Mn–O system, Journal of Alloys and Compounds 507, 84-92 (2010). doi:10.1016/j.jallcom.2010.04.252

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}
}