Cu–P system

11 accepted literature values from 1 paper(s) (experimental 10, model 1); 5 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (11) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	10
model	1

Accepted values by property group
Property group	Values
invariant reaction	1
phase transition	4
phase equilibrium	6

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
CuP-01Mie.tdb	J. Miettinen, Calphad, 25, 67-78(2001). doi:10.1016/S0364-5916(01)00031-1	`d0fcbb19146f394aebc636f03c9f90f108df4da595dd43404e4f07b2ad475851`	viewer · TDB · JSON
CuP-09Nod.tdb	T. Noda, K. Oikawa, S. Itoh, M. Hino, T. Nagasaka, Calphad, 33, 557-60(2009). doi:10.1016/j.calphad.2009.03.005	`84c5a8213d883d5fea538caf793dd5cfcfbea6bc7dcccd6975f718bfca82793d`	viewer · TDB · JSON
CuP-11Hin.tdb	M. Hino, S. Iikubo, H. Ohtani, High Temp. Mater. Proc., 30, 387-404(2011). doi:10.1515/htmp.2011.061	`6f9731f697b71a352b02416c2a74203ded90a9f6da6020a34eb56cbad9610292`	viewer · TDB · JSON
CuP-24Oik.tdb	K. Oikawa, N. Ueshima, J. Phase Equilib. Diffus., 45, 547-66(2024). doi:10.1007/s11669-024-01112-z	`9db6650d61c29ade5760e83bdca1cf2a0982fd50d9aa8edf510bf02fc5566754`	viewer · TDB · JSON
CuP-87Cha.tdb	Chandrasekan et. al., unpublished, 1987.	`660c669bfee6f6ce2b401f3ca44f158d3c393138ff9e2fec32a5b9c97b3c67c3`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CuP-01Mie.tdb	986.99	FCC_A1 (x(P) 0.03201) + LIQUID (x(P) 0.16004) + CU3P_D021 (x(P) 0.25)
CuP-01Mie.tdb	986.99	FCC_A1 (x(P) 0.032) + LIQUID (x(P) 0.16) + CU3P_D021 (x(P) 0.25)
CuP-01Mie.tdb	704.7	LIQUID (x(P) 0.91039) + GAS (x(P) 1) + RED_P (x(P) 1)
CuP-01Mie.tdb	704.7	LIQUID (x(P) 0.9103) + RED_P (x(P) 1) + GAS (x(P) 1)
CuP-01Mie.tdb	704.7	LIQUID (x(P) 0.91029) + RED_P (x(P) 1) + GAS (x(P) 1)
CuP-09Nod.tdb	1504.04	LIQUID (x(P) 0.31136) + CUP2 (x(P) 0.66667) + GAS (x(P) 1)
CuP-09Nod.tdb	987.76	FCC_A1 (x(P) 0.0363) + LIQUID (x(P) 0.15705) + CU3P_D021 (x(P) 0.25)
CuP-09Nod.tdb	987.76	FCC_A1 (x(P) 0.03628) + LIQUID (x(P) 0.15701) + CU3P_D021 (x(P) 0.25)
CuP-09Nod.tdb	704.7	CUP2 (x(P) 0.66667) + RED_P (x(P) 1) + GAS (x(P) 1)
CuP-11Hin.tdb	1165.41	CUP2 (x(P) 0.66667) + LIQUID (x(P) 0.68049) + GAS (x(P) 1)
CuP-11Hin.tdb	1107.76	CU3P_HT (x(P) 0.25) + LIQUID (x(P) 0.48631) + CUP2 (x(P) 0.66667)
CuP-11Hin.tdb	1024.72	CUP2 (x(P) 0.66667) + CU2P7 (x(P) 0.77778) + GAS (x(P) 1)
CuP-11Hin.tdb	1024.72	CUP2 (x(P) 0.66667) + CU2P7 (x(P) 0.77778) + GAS (x(P) 1)
CuP-11Hin.tdb	986.32	FCC_A1 (x(P) 0.03473) + LIQUID (x(P) 0.15779) + CU3P_HT (x(P) 0.25)
CuP-11Hin.tdb	831.66	CU3P_HT (x(P) 0.25) + CU3P_D021 (x(P) 0.25) + CUP2 (x(P) 0.66667)
CuP-11Hin.tdb	831.66	FCC_A1 (x(P) 0.02735) + CU3P_D021 (x(P) 0.25) + CU3P_HT (x(P) 0.25)
CuP-11Hin.tdb	831.66	FCC_A1 (x(P) 0.02735) + CU3P_HT (x(P) 0.25) + CU3P_D021 (x(P) 0.25)
CuP-11Hin.tdb	704.7	CU2P7 (x(P) 0.77778) + GAS (x(P) 1) + RED_P (x(P) 1)
CuP-11Hin.tdb	704.7	CU2P7 (x(P) 0.77778) + GAS (x(P) 1) + RED_P (x(P) 1)
CuP-11Hin.tdb	319.99	CUP2 (x(P) 0.66667) + CU2P7 (x(P) 0.77778) + RED_P (x(P) 1)
CuP-24Oik.tdb	2309.07	LIQUID (x(P) 0.23907) + LIQUID#2 (x(P) 0.25524) + GAS (x(P) 0.9889)
CuP-24Oik.tdb	1237.59	CU3P_D021 (x(P) 0.27285) + LIQUID (x(P) 0.35186) + GAS (x(P) 1)
CuP-24Oik.tdb	1037.03	CU3P_D021 (x(P) 0.27297) + CUP2 (x(P) 0.66667) + GAS (x(P) 1)
CuP-24Oik.tdb	976.85	FCC_A1 (x(P) 0.03538) + LIQUID (x(P) 0.1598) + CU3P_D021 (x(P) 0.25223)
CuP-24Oik.tdb	740.79	CUP2 (x(P) 0.66667) + CU2P7 (x(P) 0.77778) + GAS (x(P) 1)
CuP-24Oik.tdb	740.79	CUP2 (x(P) 0.66667) + CU2P7 (x(P) 0.77778) + GAS (x(P) 1)
CuP-24Oik.tdb	704.7	CU2P7 (x(P) 0.77778) + RED_P (x(P) 1) + GAS (x(P) 1)
CuP-24Oik.tdb	704.7	CU2P7 (x(P) 0.77778) + GAS (x(P) 1) + RED_P (x(P) 1)
CuP-87Cha.tdb	970.17	FCC_A1 (x(P) 0.02897) + LIQUID (x(P) 0.15524) + CU3P_D021 (x(P) 0.25)
CuP-87Cha.tdb	970.17	FCC_A1 (x(P) 0.02896) + LIQUID (x(P) 0.15519) + CU3P_D021 (x(P) 0.25)
CuP-87Cha.tdb	704.7	LIQUID (x(P) 0.86285) + GAS (x(P) 1) + RED_P (x(P) 1)
CuP-87Cha.tdb	704.7	LIQUID (x(P) 0.86283) + RED_P (x(P) 1) + GAS (x(P) 1)
CuP-87Cha.tdb	704.7	LIQUID (x(P) 0.86282) + RED_P (x(P) 1) + GAS (x(P) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CuP-01Mie · CALPHAD hull CuP-09Nod · CALPHAD hull CuP-11Hin · CALPHAD hull CuP-87Cha

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cu–P system (1)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
863.95	Liq. + CuP2 -> Cu2P7	Liq.: P 0.9996; Liquid: P 0.9996	model	[1] Oikawa 2024	Table 3, p. 8, row 19 report

Other properties

Phase transition (4)

Phase transition, Cu–P system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	975.57 K	975.57	other: Cu-4 alloy: Cu 0.959, P 0.041	experimental	[1] Oikawa 2024	Table 1, p. 4, row 7 report
Phase transition	975.59 K	975.59	other: Cu-3 alloy: Cu 0.9688, P 0.0312	experimental	[1] Oikawa 2024	Table 1, p. 4, row 5 report
Phase transition	1134.91 K	1134.91	other: Cu-2 alloy: Cu 0.9804, P 0.0196	experimental	[1] Oikawa 2024	Table 1, p. 4, row 3 report
Phase transition	1227.74 K	1227.74	other: Cu-1 alloy: Cu 0.9892, P 0.0108	experimental	[1] Oikawa 2024	Table 1, p. 4, row 1 report

Phase equilibrium (6)

Phase equilibrium, Cu–P system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	823.15	α + Cu3P α: Cu 0.9805, P 0.0195; Cu3P: Cu 0.7475, P 0.2525	experimental	[1] Oikawa 2024	Table 2, p. 7, row 1 report
Phase composition	873.15	α + Cu3P α: Cu 0.9773, P 0.0227; Cu3P: Cu 0.7464, P 0.2536	experimental	[1] Oikawa 2024	Table 2, p. 7, row 2 report
Phase composition	1294.25	other: Cu-4 liquid: Cu 0.959, P 0.041	experimental	[1] Oikawa 2024	Table 1, p. 4, row 8 report
Phase composition	1314.95	other: Cu-3 liquid: Cu 0.9688, P 0.0312	experimental	[1] Oikawa 2024	Table 1, p. 4, row 6 report
Phase composition	1336.15	other: Cu-2 liquid: Cu 0.9804, P 0.0196	experimental	[1] Oikawa 2024	Table 1, p. 4, row 4 report
Phase composition	1345.45	other: Cu-1 liquid: Cu 0.9892, P 0.0108	experimental	[1] Oikawa 2024	Table 1, p. 4, row 2 report

Sources

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

Katsunari Oikawa, Nobufumi Ueshima, Thermodynamic Reassessment of the Binary Cu-Sn, Cu-P, and Sn-P and Ternary Cu-Sn-P Systems, J. Phase Equilib. Diffus. 45, 547-566 (2024). doi:10.1007/s11669-024-01112-z

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}
}