Pr system

10 accepted literature values from 3 paper(s) (experimental 3, model 3, unspecified 4); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	3
model	3
unspecified	4

Accepted values by property group
Property group	Values
phase transition	3
crystal structure	7

Other properties

Phase transition (3)

Phase transition, Pr system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1068 K	1068	polymorphic: Pr alloy: Pr 1	model	[1] Norgren 2000 cites Saunders 1998	Table 1, p. 4, row 4 report
Phase transition	1068 K	1068	polymorphic: Pr alloy: Pr 1	model	[1] Norgren 2000 cites Norgren	Table 1, p. 4, row 3 report
Phase transition	1073 K	1073	polymorphic: Pr alloy: Pr 1	model	[1] Norgren 2000 cites Huasen 1995	Table 1, p. 4, row 5 report

Crystal structure (7)

Crystal structure, Pr system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	4.13 Å		(β Pr) alloy: Pr 1	experimental	[2] Peng 2011 cites Spedding 1961 doi	Table 1, p. 2, row 13 report
Lattice a	3.67 Å	298.15	(α Pr) alloy: Pr 1	experimental	[2] Peng 2011 cites Smirnov 1974	Table 1, p. 2, row 12 report
Lattice a	3.6721 Å	298.15	αPr αPr: Pr 1	unspecified	[3] Wang 2015 cites ref. 1965Jos	Table 1, p. 2, row 8 report
Lattice a	4.13 Å	298.15	βPr alloy: Pr 1	unspecified	[3] Wang 2015 cites ref. 1993Sac	Table 1, p. 2, row 7 report
Lattice a	4.13 Å	298.15	βPra βPra: Pr 1	unspecified	[3] Wang 2015 cites ref. 1993Sac	Table 1, p. 2, row 15 report
Lattice b	11.8326 Å	298.15	αPr αPr: Pr 1	unspecified	[3] Wang 2015 cites ref. 1965Jos	Table 1, p. 2, row 8 report
Lattice c	11.83 Å	298.15	(α Pr) alloy: Pr 1	experimental	[2] Peng 2011 cites Smirnov 1974	Table 1, p. 2, row 12 report

Sources

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

Susanne Norgren, Thermodynamic assessment of the Ho-Tb, Ho-Dy, Ho-Er, Er-Tb, and Er-Dy systems, JPE 21, 148-156 (2000). doi:10.1361/105497100770340200
Yingbiao Peng, Yong Du, Lijun Zhang, Chunsheng Sha, Shuhong Liu, Feng Zheng et al., Thermodynamic modeling of the C–RE (RE=La, Ce and Pr) systems, Calphad 35, 533-541 (2011). doi:10.1016/j.calphad.2011.09.002
Peisheng Wang, Rainer Schmid-Fetzer, Thermodynamic assessment of the Mg–Pr system, Computational Materials Science 104, 138-142 (2015). doi:10.1016/j.commatsci.2014.11.050

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}
}