Al–Pr system

29 accepted literature values from 1 paper(s) (experimental 12, model 17); 2 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (13) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	12
model	17

Accepted values by property group
Property group	Values
invariant reaction	28
phase transition	1

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
AlPr-01Yin.tdb	F. Yin, X. Su, Z. Li, P. Zhang, Z. Metallkd., 92, 447-50(2001). doi:10.3139/ijmr-2001-0089	`0ae952d0952723dc004a97ffaca6fce3800da77313087a451a797099fb335fd9`	viewer · TDB · JSON
AlPr-19Lia.tdb	J. Liao, Y. Liao, H. Wang, L. Zhang, Y. Ma, Mater. Res. Express, 6, 086512(2019).	`d758143d04999e54382ea23ba404f571a39939c27418bc835f13737d7633c468`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
AlPr-01Yin.tdb	1518.42	LIQUID (x(Pr) 0.18945) + AL11PR3 (x(Pr) 0.21429) + AL2PR_C15 (x(Pr) 0.33333)
AlPr-01Yin.tdb	1518.41	LIQUID (x(Pr) 0.18917) + AL11PR3 (x(Pr) 0.21429) + AL2PR_C15 (x(Pr) 0.33333)
AlPr-01Yin.tdb	1518.41	LIQUID (x(Pr) 0.18924) + AL11PR3 (x(Pr) 0.21429) + AL2PR_C15 (x(Pr) 0.33333)
AlPr-01Yin.tdb	1346.62	AL11PR3 (x(Pr) 0.21429) + AL3PR_D019 (x(Pr) 0.25) + AL2PR_C15 (x(Pr) 0.33333)
AlPr-01Yin.tdb	1204	AL2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 1) + BCC_A2 (x(Pr) 1)
AlPr-01Yin.tdb	1171.55	AL2PR_C15 (x(Pr) 0.33333) + ALPR (x(Pr) 0.5) + LIQUID (x(Pr) 0.64413)
AlPr-01Yin.tdb	1171.55	AL2PR_C15 (x(Pr) 0.33333) + ALPR (x(Pr) 0.5) + LIQUID (x(Pr) 0.64404)
AlPr-01Yin.tdb	1011.8	ALPR (x(Pr) 0.5) + ALPR2_C37 (x(Pr) 0.66667) + LIQUID (x(Pr) 0.7041)
AlPr-01Yin.tdb	1011.8	ALPR (x(Pr) 0.5) + ALPR2_C37 (x(Pr) 0.66667) + LIQUID (x(Pr) 0.70415)
AlPr-01Yin.tdb	1011.8	ALPR (x(Pr) 0.5) + ALPR2_C37 (x(Pr) 0.66667) + LIQUID (x(Pr) 0.70408)
AlPr-01Yin.tdb	957.2	ALPR2_C37 (x(Pr) 0.66667) + ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.7602)
AlPr-01Yin.tdb	957.2	ALPR2_C37 (x(Pr) 0.66667) + ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.75994)
AlPr-01Yin.tdb	957.2	ALPR2_C37 (x(Pr) 0.66667) + ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.76021)
AlPr-01Yin.tdb	923.81	ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.81409) + BCC_A2 (x(Pr) 0.91508)
AlPr-01Yin.tdb	923.81	ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.81414) + BCC_A2 (x(Pr) 0.91514)
AlPr-01Yin.tdb	912.03	FCC_A1 (x(Pr) 0) + LIQUID (x(Pr) 0.02056) + AL11PR3 (x(Pr) 0.21429)
AlPr-01Yin.tdb	912.03	FCC_A1 (x(Pr) 0) + LIQUID (x(Pr) 0.02048) + AL11PR3 (x(Pr) 0.21429)
AlPr-01Yin.tdb	912.03	FCC_A1 (x(Pr) 0) + LIQUID (x(Pr) 0.02045) + AL11PR3 (x(Pr) 0.21429)
AlPr-01Yin.tdb	892.72	ALPR3 (x(Pr) 0.75) + BCC_A2 (x(Pr) 0.91437) + DHCP (x(Pr) 0.97228)
AlPr-01Yin.tdb	892.72	ALPR3 (x(Pr) 0.75) + BCC_A2 (x(Pr) 0.91446) + DHCP (x(Pr) 0.97229)
AlPr-19Lia.tdb	1525.74	LIQUID (x(Pr) 0.19125) + AL11PR3_BETA (x(Pr) 0.21429) + AL2PR_C15 (x(Pr) 0.33333)
AlPr-19Lia.tdb	1525.74	LIQUID (x(Pr) 0.1913) + AL11PR3_BETA (x(Pr) 0.21429) + AL2PR_C15 (x(Pr) 0.33333)
AlPr-19Lia.tdb	1525.74	LIQUID (x(Pr) 0.19143) + AL11PR3_BETA (x(Pr) 0.21429) + AL2PR_C15 (x(Pr) 0.33333)
AlPr-19Lia.tdb	1292	AL11PR3_BETA (x(Pr) 0.21429) + AL3PR_D019 (x(Pr) 0.25) + AL2PR_C15 (x(Pr) 0.33333)
AlPr-19Lia.tdb	1238	AL11PR3_BETA (x(Pr) 0.21429) + AL11PR3_ALPHA (x(Pr) 0.21429) + AL3PR_D019 (x(Pr) 0.25)
AlPr-19Lia.tdb	1238	LIQUID (x(Pr) 0.07397) + AL11PR3_ALPHA (x(Pr) 0.21429) + AL11PR3_BETA (x(Pr) 0.21429)
AlPr-19Lia.tdb	1238	LIQUID (x(Pr) 0.07385) + AL11PR3_BETA (x(Pr) 0.21429) + AL11PR3_ALPHA (x(Pr) 0.21429)
AlPr-19Lia.tdb	1204	AL2PR_C15 (x(Pr) 0.33333) + LIQUID (x(Pr) 1) + BCC_A2 (x(Pr) 1)
AlPr-19Lia.tdb	1171.55	AL2PR_C15 (x(Pr) 0.33333) + ALPR (x(Pr) 0.5) + LIQUID (x(Pr) 0.64413)
AlPr-19Lia.tdb	1171.55	AL2PR_C15 (x(Pr) 0.33333) + ALPR (x(Pr) 0.5) + LIQUID (x(Pr) 0.64404)
AlPr-19Lia.tdb	1011.8	ALPR (x(Pr) 0.5) + ALPR2_C37 (x(Pr) 0.66667) + LIQUID (x(Pr) 0.7041)
AlPr-19Lia.tdb	1011.8	ALPR (x(Pr) 0.5) + ALPR2_C37 (x(Pr) 0.66667) + LIQUID (x(Pr) 0.70415)
AlPr-19Lia.tdb	1011.8	ALPR (x(Pr) 0.5) + ALPR2_C37 (x(Pr) 0.66667) + LIQUID (x(Pr) 0.70408)
AlPr-19Lia.tdb	957.2	ALPR2_C37 (x(Pr) 0.66667) + ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.7602)
AlPr-19Lia.tdb	957.2	ALPR2_C37 (x(Pr) 0.66667) + ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.75994)
AlPr-19Lia.tdb	957.2	ALPR2_C37 (x(Pr) 0.66667) + ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.76021)
AlPr-19Lia.tdb	923.81	ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.81409) + BCC_A2 (x(Pr) 0.91508)
AlPr-19Lia.tdb	923.81	ALPR3 (x(Pr) 0.75) + LIQUID (x(Pr) 0.81414) + BCC_A2 (x(Pr) 0.91514)
AlPr-19Lia.tdb	912.69	FCC_A1 (x(Pr) 1.100e-4) + LIQUID (x(Pr) 0.02015) + AL11PR3_ALPHA (x(Pr) 0.21429)
AlPr-19Lia.tdb	912.69	FCC_A1 (x(Pr) 1.100e-4) + LIQUID (x(Pr) 0.02006) + AL11PR3_ALPHA (x(Pr) 0.21429)
AlPr-19Lia.tdb	895.42	ALPR3 (x(Pr) 0.75) + BCC_A2 (x(Pr) 0.9145) + DHCP (x(Pr) 0.97157)
AlPr-19Lia.tdb	895.42	ALPR3 (x(Pr) 0.75) + BCC_A2 (x(Pr) 0.91452) + DHCP (x(Pr) 0.97157)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull AlPr-01Yin

Invariant reactions (literature)

Invariant reactions reported in the literature for the Al–Pr system (28)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1519.15	Liq + Al2Pr -> β_Al11Pr3	L: Pr 0.1894; Al2Pr: Al 0.666667, Pr 0.333333; β_Al11Pr3: Al 0.785714, Pr 0.214286	model	[1] Liao 2019	Table 3, p. 6, row 4 report
1518.15	Liq + Al2Pr -> β_Al11Pr3	Al2Pr: Al 0.666667, Pr 0.333333; β_Al11Pr3: Al 0.785714, Pr 0.214286	model	[1] Liao 2019 cites Yin 2001	Table 3, p. 6, row 5 report
1513.15	Liq + Al2Pr -> β_Al11Pr3	L: Pr 0.205; Al2Pr: Al 0.666667, Pr 0.333333; β_Al11Pr3: Al 0.785714, Pr 0.214286	experimental	[1] Liao 2019 cites Buschow 1966	Table 3, p. 6, row 6 report
1348.15	β_Al11Pr3 + Al2Pr -> Al3Pr	β_Al11Pr3: Al 0.785714, Pr 0.214286; Al2Pr: Al 0.666667, Pr 0.333333; Al3Pr: Al 0.75, Pr 0.25	experimental	[1] Liao 2019 cites Buschow 1966	Table 3, p. 6, row 8 report
1348.15	β_Al11Pr3 + Al2Pr -> Al3Pr	β_Al11Pr3: Al 0.785714, Pr 0.214286; Al2Pr: Al 0.666667, Pr 0.333333; Al3Pr: Al 0.75, Pr 0.25	model	[1] Liao 2019	Table 3, p. 6, row 7 report
1238.15	Liq + β_Al11Pr3 -> α_Al11Pr3	L: Pr 0.075; β_Al11Pr3: Al 0.785714, Pr 0.214286; α_Al11Pr3: Al 0.785714, Pr 0.214286	model	[1] Liao 2019	Table 3, p. 6, row 14 report
1238.15	β_Al11Pr3 -> Al3Pr + α_Al11Pr3	β_Al11Pr3: Al 0.785714, Pr 0.214286; Al3Pr: Al 0.75, Pr 0.25; α_Al11Pr3: Al 0.785714, Pr 0.214286	model	[1] Liao 2019	Table 3, p. 6, row 12 report
1238.15	β_Al11Pr3 -> Al3Pr + α_Al11Pr3	β_Al11Pr3: Al 0.785714, Pr 0.214286; Al3Pr: Al 0.75, Pr 0.25; α_Al11Pr3: Al 0.785714, Pr 0.214286	experimental	[1] Liao 2019 cites Buschow 1966	Table 3, p. 6, row 13 report
1238.15	Liq + β_Al11Pr3 -> α_Al11Pr3	L: Pr 0.2142; β_Al11Pr3: Al 0.785714, Pr 0.214286; α_Al11Pr3: Al 0.785714, Pr 0.214286	experimental	[1] Liao 2019 cites Buschow 1966	Table 3, p. 6, row 15 report
1178.15	Liq + Al2Pr -> AlPr	L: Pr 0.66; Al2Pr: Al 0.666667, Pr 0.333333; AlPr: Al 0.5, Pr 0.5	experimental	[1] Liao 2019 cites Buschow 1966	Table 3, p. 6, row 11 report
1172.15	Liq + Al2Pr -> AlPr	Al2Pr: Al 0.666667, Pr 0.333333; AlPr: Al 0.5, Pr 0.5	model	[1] Liao 2019 cites Yin 2001	Table 3, p. 6, row 10 report
1172.15	Liq + Al2Pr -> AlPr	L: Pr 0.6441; Al2Pr: Al 0.666667, Pr 0.333333; AlPr: Al 0.5, Pr 0.5	model	[1] Liao 2019	Table 3, p. 6, row 9 report
1012.15	Liq + AlPr -> AlPr2	L: Pr 0.7; AlPr: Al 0.5, Pr 0.5; AlPr2: Al 0.333333, Pr 0.666667	experimental	[1] Liao 2019 cites Saccone 1996	Table 3, p. 6, row 19 report
1012.15	Liq + AlPr -> AlPr2	L: Pr 0.7041; AlPr: Al 0.5, Pr 0.5; AlPr2: Al 0.333333, Pr 0.666667	model	[1] Liao 2019	Table 3, p. 6, row 16 report
1012.15	Liq + AlPr -> AlPr2	L: Pr 0.678; AlPr: Al 0.5, Pr 0.5; AlPr2: Al 0.333333, Pr 0.666667	experimental	[1] Liao 2019 cites Buschow 1966	Table 3, p. 6, row 18 report
1008.15	Liq + AlPr -> AlPr2	AlPr: Al 0.5, Pr 0.5; AlPr2: Al 0.333333, Pr 0.666667	model	[1] Liao 2019 cites Yin 2001	Table 3, p. 6, row 17 report
958.15	Liq + AlPr2 -> AlPr3	L: Pr 0.76; AlPr2: Al 0.333333, Pr 0.666667; AlPr3: Al 0.25, Pr 0.75	experimental	[1] Liao 2019 cites Saccone 1996	Table 3, p. 6, row 22 report
957.15	Liq + AlPr2 -> AlPr3	AlPr2: Al 0.333333, Pr 0.666667; AlPr3: Al 0.25, Pr 0.75	model	[1] Liao 2019 cites Yin 2001	Table 3, p. 6, row 21 report
957.15	Liq + AlPr2 -> AlPr3	L: Pr 0.7602; AlPr2: Al 0.333333, Pr 0.666667; AlPr3: Al 0.25, Pr 0.75	model	[1] Liao 2019	Table 3, p. 6, row 20 report
924.15	eutectic: Liq -> AlPr3 + bcc	L: Pr 0.8141; AlPr3: Al 0.25, Pr 0.75	model	[1] Liao 2019	Table 3, p. 6, row 23 report
924.15	eutectic: Liq -> AlPr3 + bcc	AlPr3: Al 0.25, Pr 0.75	model	[1] Liao 2019 cites Yin 2001	Table 3, p. 6, row 24 report
923.15	eutectic: Liq -> AlPr3 + bcc	L: Pr 0.825; AlPr3: Al 0.25, Pr 0.75	experimental	[1] Liao 2019 cites Saccone 1996	Table 3, p. 6, row 25 report
913.15	eutectic: Liq -> fcc + α_Al11Pr3	L: Pr 0.05; α_Al11Pr3: Al 0.785714, Pr 0.214286	experimental	[1] Liao 2019 cites Buschow 1966	Table 3, p. 6, row 3 report
912.15	eutectic: Liq -> fcc + α_Al11Pr3	L: Pr 0.02054; α_Al11Pr3: Al 0.785714, Pr 0.214286	model	[1] Liao 2019	Table 3, p. 6, row 1 report
912.15	eutectic: Liq -> fcc + α_Al11Pr3	α_Al11Pr3: Al 0.785714, Pr 0.214286	model	[1] Liao 2019 cites Yin 2001	Table 3, p. 6, row 2 report
895.15	bcc -> AlPr3 + dhcp	AlPr3: Al 0.25, Pr 0.75	model	[1] Liao 2019	Table 3, p. 6, row 26 report
893.15	bcc -> AlPr3 + dhcp	AlPr3: Al 0.25, Pr 0.75	experimental	[1] Liao 2019 cites Saccone 1996	Table 3, p. 6, row 28 report
892.15	bcc -> AlPr3 + dhcp	AlPr3: Al 0.25, Pr 0.75	model	[1] Liao 2019 cites Yin 2001	Table 3, p. 6, row 27 report

Other properties

Phase transition (1)

Phase transition, Al–Pr system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1238.15 K	1238.15	polymorphic	experimental	[1] Liao 2019 cites Buschow 1966	p. 3 report	Buschow et al [19] first determined the entire composition by metallography, thermal analysis and x-ray diffractometry, and found four solution phases (liquid, fcc, bcc and dhcp) and six intermetallic compounds (Al4Pr, Al3Pr, Al2Pr, AlPr, AlPr2 and AlPr3), including an allotropic transformation α_Al4Pr/β_Al4Pr at 965 °C.

Sources

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

Jinfa Liao, Yuehui Liao, Hang Wang, Ligang Zhang, Yue Ma, Thermodynamic optimization of the Ni–Al–Pr ternary system, Mater. Res. Express 6, 086512 (2019). doi:10.1088/2053-1591/ab19fa

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}
}