Mn–O–Ta system

19 accepted literature values from 1 paper(s) (experimental 19); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	19

Accepted values by property group
Property group	Values
phase equilibrium	16
crystal structure	3

Other properties

Phase equilibrium (16)

Phase equilibrium, Mn–O–Ta system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition		Matrix + Second phase Matrix: Mn 0.606, O 0, Ta 0.394; Second phase: Mn 0.213, O 0, Ta 0.787	experimental	[1] Yan 2021	Table 5, p. 11, row 15 report
Phase composition		Matrix + Second phase Matrix: Mn 0.994, O 0, Ta 0.006; Second phase: Mn 0.686, O 0, Ta 0.314	experimental	[1] Yan 2021	Table 5, p. 11, row 9 report
Phase composition		Matrix + Second phase Matrix: Mn 0.994, O 0, Ta 0.006; Second phase: Mn 0.705, O 0, Ta 0.295	experimental	[1] Yan 2021	Table 5, p. 11, row 7 report
Phase composition		Matrix + Second phase Matrix: Mn 0.586, O 0, Ta 0.414; Second phase: Mn 0.137, O 0, Ta 0.863	experimental	[1] Yan 2021	Table 5, p. 11, row 16 report
Phase composition		Matrix + Second phase + Eutectic Matrix: Mn 0.994, O 0, Ta 0.006; Second phase: Mn 0.995, O 0, Ta 0.005; Eutectic: Mn 0.677, O 0.001, Ta 0.322	experimental	[1] Yan 2021	Table 5, p. 11, row 2 report
Phase composition		Matrix + Second phase + Eutectic Matrix: Mn 0.994, O 0, Ta 0.006; Second phase: Mn 0.694, O 0, Ta 0.306; Eutectic: Mn 0.993, O 0, Ta 0.007	experimental	[1] Yan 2021	Table 5, p. 11, row 1 report
Phase composition		Matrix + Second phase + Eutectic Matrix: Mn 0.995, O 0, Ta 0.005; Second phase: Mn 0.996, O 0, Ta 0.004; Eutectic: Mn 0.995, O 0, Ta 0.005	experimental	[1] Yan 2021	Table 5, p. 11, row 5 report
Phase composition		Matrix + Second phase + η-Ta-Mn Matrix: Mn 0.992, O 0, Ta 0.008; Second phase: Mn 0.736, O 0, Ta 0.264; η-Ta-Mn: Mn 0.534, O 4.000e-4, Ta 0.4656	experimental	[1] Yan 2021	Table 5, p. 11, row 3 report
Phase composition		Matrix + Second phase + η-Ta-Mn Matrix: Mn 0.588, O 0, Ta 0.412; Second phase: Mn 0.147, O 0, Ta 0.853; η-Ta-Mn: Mn 0.457, O 0, Ta 0.543	experimental	[1] Yan 2021	Table 5, p. 11, row 14 report
Phase composition		Matrix + Second phase + η-Ta-Mn Matrix: Mn 0.995, O 0, Ta 0.005; Second phase: Mn 0.684, O 0, Ta 0.316; η-Ta-Mn: Mn 0.488, O 0, Ta 0.512	experimental	[1] Yan 2021	Table 5, p. 11, row 10 report
Phase composition		η-Ta-Mn-O + η-Ta-Mn η-Ta-Mn-O: Mn 0.52, O 0.048, Ta 0.432; η-Ta-Mn: Mn 0.52, O 0.048, Ta 0.432	experimental	[1] Yan 2021	Table 5, p. 11, row 12 report
Phase composition	973.15	Matrix + Second phase Matrix: Mn 0.976, O 0, Ta 0.024; Second phase: Mn 0.674, O 0, Ta 0.326	experimental	[1] Yan 2021	Table 5, p. 11, row 8 report
Phase composition	1173.15	Matrix + Second phase Matrix: Mn 0.996, O 0, Ta 0.004; Second phase: Mn 0.685, O 0, Ta 0.315	experimental	[1] Yan 2021	Table 5, p. 11, row 11 report
Phase composition	1173.15	Matrix + Second phase + η-Ta-Mn Matrix: Mn 0.591, O 0, Ta 0.409; Second phase: Mn 0.147, O 0, Ta 0.853; η-Ta-Mn: Mn 0.541, O 0, Ta 0.459	experimental	[1] Yan 2021	Table 5, p. 11, row 13 report
Phase composition	1223.15	Matrix Matrix: Mn 0.999, O 0, Ta 0.001	experimental	[1] Yan 2021	Table 5, p. 11, row 6 report
Phase composition	1223.15	Matrix + Second phase + η-Ta-Mn Matrix: Mn 0.993, O 0, Ta 0.007; Second phase: Mn 0.747, O 0, Ta 0.253; η-Ta-Mn: Mn 0.532, O 0, Ta 0.468	experimental	[1] Yan 2021	Table 5, p. 11, row 4 report

Crystal structure (3)

Crystal structure, Mn–O–Ta system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	11.4546 Å ± 1.000e-4	298.15	Ta2.78Mn3.22O0.33 alloy: Mn 0.57, Ta 0.43	experimental	[1] Yan 2021	Table 3, p. 9, row 4 report
Lattice a	11.4088 Å ± 3.000e-4	298.15	Ta2.84Mn3.16O0.23 alloy: Mn 0.57, Ta 0.43	experimental	[1] Yan 2021	Table 3, p. 9, row 6 report
Lattice a	11.2859 Å ± 2.000e-4	298.15	Ta3.01Mn2.99O0.13 alloy: Mn 0.57, Ta 0.43	experimental	[1] Yan 2021	Table 3, p. 9, row 7 report

Sources

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

Xinlin Yan, Pavel Brož, Jan Vřešťál, Jiří Vlach, Jiří Buršík, Martina Mazalová et al., On the constitution and thermodynamic modeling of the phase diagrams Nb-Mn and Ta-Mn, Journal of Alloys and Compounds 865, 158715 (2021). doi:10.1016/j.jallcom.2021.158715

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 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_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}
}