# Mn3O4: enthalpy of formation

> Enthalpy of formation of Mn3O4: 37 literature value(s) with sources, pages and quotes and DFT values (Materials Project / OQMD), from ORCHID.

HTML: https://data.orchid-project.org/compounds/Mn3O4.html · Markdown: https://data.orchid-project.org/compounds/Mn3O4.md

37 accepted literature formation-enthalpy value(s) (experimental 19, model 14, unspecified 4); experimental median -196.78 kJ/mol-atom (n = 19); Materials Project -197.834 kJ/mol-atom (mp-aaaabbtn); OQMD -200.053 kJ/mol-atom (oqmd-5975).

Systems: [Mn–O](https://data.orchid-project.org/systems/MN-O.html)

## Literature values

Table: Enthalpy of formation of Mn3O4 reported in the literature (37)

| Value | Phase as printed | T (K) | Class | Method | System | Source | Location | Quote |
|---:|---|---:|---|---|---|---|---|---|
| -206.35 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Roth 1929_ [doi](https://doi.org/10.1002/ange.19290424102) | Table 11, p. 16, row 15; `ORC-5XFZM5QTXJ` |  |
| -206.35 kJ/mol-atom | Mn3O4 | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Roth 1929_ [doi](https://doi.org/10.1002/ange.19290424102) | Table 11, p. 16, row 60; `ORC-FODYDWIRAG` |  |
| -201.266 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Siemonsen 1939_ | Table 11, p. 16, row 16; `ORC-SCL3HUZ64I` |  |
| -201.266 kJ/mol-atom | Mn3O4 | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Siemonsen 1939_ | Table 11, p. 16, row 61; `ORC-VVCEA7QBGW` |  |
| -201.206 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Ulich 1940_ [doi](https://doi.org/10.1002/srin.194001311) | Table 11, p. 16, row 17; `ORC-PU4GVT75GB` |  |
| -201.206 kJ/mol-atom | Mn3O4 | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Ulich 1940_ [doi](https://doi.org/10.1002/srin.194001311) | Table 11, p. 16, row 62; `ORC-Y3OF7NGIA4` |  |
| -198.364 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | experimental | solution | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Shomate 1943_ [doi](https://doi.org/10.1021/ja01245a016) | Table 11, p. 16, row 18; `ORC-IPRFS25TUD` |  |
| -198.364 kJ/mol-atom | Mn3O4 | 298.15 | experimental | solution | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Shomate 1943_ [doi](https://doi.org/10.1021/ja01245a016) | Table 11, p. 16, row 63; `ORC-ZEYWTZTVRV` |  |
| -196.78 kJ/mol-atom | Mn3O4 | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Ruff 1913_ [doi](https://doi.org/10.1002/cber.19130460159) | Table 11, p. 16, row 59; `ORC-6YP2G43BAO` |  |
| -196.78 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Ruff 1913_ [doi](https://doi.org/10.1002/cber.19130460159) | Table 11, p. 16, row 14; `ORC-ED4AB7EXCW` |  |
| -196.181 kJ/mol-atom | Mn3O4 | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Le 1896_ | Table 11, p. 16, row 58; `ORC-KWTNDMGT4W` |  |
| -196.181 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | experimental | combustion | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Le 1896_ | Table 11, p. 16, row 13; `ORC-VH7ZWPJY45` |  |
| 196.181 kJ/mol-atom | Mn3O4 | 298.15 | experimental |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Le 1896_ | Table 1, p. 5, row 1; `ORC-P3442DZZI6` |  |
| 196.78 kJ/mol-atom | Mn3O4 | 298.15 | experimental |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Ruff 1913_ [doi](https://doi.org/10.1002/cber.19130460159) | Table 1, p. 5, row 2; `ORC-OF7YZ4OCHX` |  |
| 198.156 kJ/mol-atom | Mn3O4 | 298.15 | experimental |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Mah 1960_ | Table 1, p. 5, row 7; `ORC-QOMRTGICZ5` |  |
| 198.216 kJ/mol-atom | Mn3O4 | 298.15 | experimental |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Robie 1968_ | Table 1, p. 5, row 8; `ORC-QZ2I3A6NYV` |  |
| 198.364 kJ/mol-atom | Mn3O4 | 298.15 | experimental |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Shomate 1943_ [doi](https://doi.org/10.1021/ja01245a016) | Table 1, p. 5, row 6; `ORC-NRMMC4OTJO` |  |
| 201.266 kJ/mol-atom | Mn3O4 | 298.15 | experimental |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Siemonsen 1939_ | Table 1, p. 5, row 4; `ORC-ZPFJ3SIJDS` |  |
| 206.35 kJ/mol-atom | Mn3O4 | 298.15 | experimental |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Roth 1929_ [doi](https://doi.org/10.1002/ange.19290424102) | Table 1, p. 5, row 3; `ORC-O4LF5UQABA` |  |
| -198.397 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Pankratz 1982_ | Table 11, p. 16, row 21; `ORC-RO25SZGUBN` |  |
| -198.397 kJ/mol-atom | Mn3O4 | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Pankratz 1982_ | Table 11, p. 16, row 66; `ORC-T535JAFTM4` |  |
| -198.216 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Robie 1968_ | Table 11, p. 16, row 20; `ORC-JAYG4SP7LI` |  |
| -198.216 kJ/mol-atom | Mn3O4 | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Robie 1968_ | Table 11, p. 16, row 65; `ORC-YXNU7TWNL6` |  |
| -198.2 kJ/mol-atom | Mn3O4 | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Kubaschewski 1993_ | Table 11, p. 16, row 68; `ORC-HORKDQ3MSC` |  |
| -198.2 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Kubaschewski 1993_ | Table 11, p. 16, row 23; `ORC-VQPXQR5AQX` |  |
| -198.156 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Mah 1960_ | Table 11, p. 16, row 19; `ORC-GWEIPCQBVT` |  |
| -198.156 kJ/mol-atom | Mn3O4 | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Mah 1960_ | Table 11, p. 16, row 64; `ORC-ZND33RTFIX` |  |
| -198.014 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Knacke 1991_ | Table 11, p. 16, row 22; `ORC-EFXJVKAD2G` |  |
| -198.014 kJ/mol-atom | Mn3O4 | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003; _cites Knacke 1991_ | Table 11, p. 16, row 67; `ORC-Q5OLE6YC6B` |  |
| -197.534 kJ/mol-atom | Mn3O4 | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003 | Table 11, p. 16, row 69; `ORC-IAZM4Q7YXJ` |  |
| -197.534 kJ/mol-atom | Hausmannite (Mn3O4) | 298.15 | model | assessed | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [1] Grundy 2003 | Table 11, p. 16, row 24; `ORC-JYMEPN5NSB` |  |
| 197.534 kJ/mol-atom | Mn3O4 | 298.15 | model |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Grundy 2003_ | Table 1, p. 5, row 12; `ORC-JOYPE76SKL` |  |
| 197.914 kJ/mol-atom | Mn3O4 | 298.15 | model |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010 | Table 1, p. 5, row 13; `ORC-OOK4XMA4V5` |  |
| 198.014 kJ/mol-atom | Mn3O4 | 298.15 | unspecified |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Knacke 2010_ | Table 1, p. 5, row 10; `ORC-SJQNK6QQKR` |  |
| 198.2 kJ/mol-atom | Mn3O4 | 298.15 | unspecified |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Kubaschewski 1993_ | Table 1, p. 5, row 11; `ORC-S2J5QCW5R6` |  |
| 198.397 kJ/mol-atom | Mn3O4 | 298.15 | unspecified |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Pankratz 1982_ | Table 1, p. 5, row 9; `ORC-3BTH25KMV7` |  |
| 201.206 kJ/mol-atom | Mn3O4 | 298.15 | unspecified |  | [Mn–O](https://data.orchid-project.org/systems/MN-O.html) | [2] Kjellqvist 2010; _cites Ulich 1940_ | Table 1, p. 5, row 5; `ORC-IRJXYJDNH7` |  |

### Uncertainty budget

Components kept separate, in the value's unit (literature [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md), [UNCERTAINTY_CALIBRATION.md](https://data.orchid-project.org/literature/UNCERTAINTY_CALIBRATION.md)): effective = max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter). The method floor is the robust between-study scatter of the method class in ORCHID (calibrated) or a documented prior; printed values and printed uncertainties are unchanged.

Table: Uncertainty budget of the literature values of Mn3O4

| Value | Unit | Printed | Reading | Method (class, basis) | Composition | Scatter | Conversion | Effective |
|---:|---|---:|---:|---|---:|---:|---:|---:|
| -206.35 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| -206.35 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| -201.266 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| -201.266 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| -201.206 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| -201.206 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| -198.364 | kJ/mol-atom |  | 7.143e-4 | 3.2 (solution_reaction_calorimetry, calibrated) |  |  |  | 3.2 |
| -198.364 | kJ/mol-atom |  | 7.143e-4 | 3.2 (solution_reaction_calorimetry, calibrated) |  |  |  | 3.2 |
| -196.78 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| -196.78 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| -196.181 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| -196.181 | kJ/mol-atom |  | 7.143e-4 | 1 (combustion_calorimetry, cleaned_below_threshold) |  |  |  | 1 |
| 196.181 | kJ/mol-atom |  | 7.143e-4 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| 196.78 | kJ/mol-atom |  | 7.143e-4 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| 198.156 | kJ/mol-atom |  | 7.143e-4 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| 198.216 | kJ/mol-atom |  | 7.143e-4 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| 198.364 | kJ/mol-atom |  | 7.143e-4 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| 201.266 | kJ/mol-atom |  | 7.143e-4 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| 206.35 | kJ/mol-atom |  | 7.143e-4 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| -198.397 | kJ/mol-atom |  | 7.143e-4 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -198.397 | kJ/mol-atom |  | 7.143e-4 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -198.216 | kJ/mol-atom |  | 7.143e-4 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -198.216 | kJ/mol-atom |  | 7.143e-4 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -198.2 | kJ/mol-atom |  | 0.007143 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -198.2 | kJ/mol-atom |  | 0.007143 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -198.156 | kJ/mol-atom |  | 7.143e-4 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -198.156 | kJ/mol-atom |  | 7.143e-4 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -198.014 | kJ/mol-atom |  | 0.007143 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -198.014 | kJ/mol-atom |  | 0.007143 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -197.534 | kJ/mol-atom |  | 7.143e-4 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| -197.534 | kJ/mol-atom |  | 7.143e-4 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| 197.534 | kJ/mol-atom |  | 7.143e-4 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| 197.914 | kJ/mol-atom |  | 0.007143 | 3.9 (model_calculated, calibrated) |  |  |  | 3.9 |
| 198.014 | kJ/mol-atom |  | 0.007143 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| 198.2 | kJ/mol-atom |  | 0.007143 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| 198.397 | kJ/mol-atom |  | 7.143e-4 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |
| 201.206 | kJ/mol-atom |  | 7.143e-4 | 3.5 (unknown, calibrated) |  |  |  | 3.5 |

## DFT formation energies

Lowest-energy entries at this composition. Materials Project and OQMD use different energy references and are never averaged. 1 eV/atom = 96.485 kJ/mol-atom.

Table: DFT formation energy of Mn3O4

| Source | Entry | kJ/mol-atom | eV/atom | Space group | E above hull (kJ/mol-atom) | E above hull (eV/atom) | Theoretical |
|---|---|---:|---:|---|---:|---:|---|
| Materials Project | mp-aaaabbtn | -197.834 | -2.05041 | I4_1/amd | 0 | 0 | no |
| OQMD | oqmd-5975 | -200.053 | -2.07341 | I41/amd | 0 | 0 | no |

DFT sources: A. Jain et al., Commentary: The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002. [doi:10.1063/1.4812323](https://doi.org/10.1063/1.4812323) (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501-1509; S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010. [doi:10.1007/s11837-013-0755-4](https://doi.org/10.1007/s11837-013-0755-4) (CC BY 4.0); 

## Sources

1. A. Nicholas Grundy, Bengt Hallstedt, Ludwig J. Gauckler, Assessment of the Mn-O system, JPE 24, 21-39 (2003). [doi:10.1007/s11669-003-0004-6](https://doi.org/10.1007/s11669-003-0004-6)
2. Lina Kjellqvist, Malin Selleby, Thermodynamic Assessment of the Fe-Mn-O System, J. Phase Equilib. Diffus. 31, 113-134 (2010). [doi:10.1007/s11669-009-9643-6](https://doi.org/10.1007/s11669-009-9643-6)

## 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). https://doi.org/10.5281/zenodo.23735569
- R. Arróyave, J. Saal, D. Shin, ORCHID-Parity: DFT-vs-experiment formation-enthalpy benchmark (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735943
- R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/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); 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); G. Kim, S. V. Meschel, P. Nash, W. Chen, Experimental formation enthalpies for intermetallic phases and other inorganic compounds, Scientific Data 4 (2017) 170162, https://doi.org/10.1038/sdata.2017.162; 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.

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.

```bibtex
@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_dft_benchmark_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Parity: DFT-vs-experiment formation-enthalpy benchmark}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735943},
  url       = {https://doi.org/10.5281/zenodo.23735943},
  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}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).