Np system

9 accepted literature values from 2 paper(s) (unspecified 9); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
unspecified	9

Accepted values by property group
Property group	Values
crystal structure	9

Other properties

Crystal structure (9)

Crystal structure, Np system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	6.663 Å	293	α-Np	unspecified	[1] Smith 2016 cites Lemire 2001	Table 1, p. 2, row 1 report
Lattice a	4.897 Å	586	β-Np	unspecified	[1] Smith 2016 cites Lemire 2001	Table 1, p. 2, row 2 report
Lattice a	3.518 Å	873	γ-Np	unspecified	[1] Smith 2016 cites Lemire 2001	Table 1, p. 2, row 3 report
Lattice b	4.723 Å	293	α-Np	unspecified	[1] Smith 2016 cites Lemire 2001	Table 1, p. 2, row 1 report
Lattice c	4.887 Å	293	α-Np	unspecified	[1] Smith 2016 cites Lemire 2001	Table 1, p. 2, row 1 report
Lattice c	3.388 Å	586	β-Np	unspecified	[1] Smith 2016 cites Lemire 2001	Table 1, p. 2, row 2 report
Molar volume printed: V	12.16 cm^3 mol^-1		B.c.c. alloy: Np 1	unspecified	[2] Ogawa 1993	Table 1, p. 2, row 5 report
Molar volume printed: V	12.16 cm^3 mol^-1		F.c.c. alloy: Np 1	unspecified	[2] Ogawa 1993	Table 1, p. 2, row 6 report
Molar volume printed: V	13.1 cm^3 mol^-1		Liquid alloy: Np 1	unspecified	[2] Ogawa 1993	Table 1, p. 2, row 4 report

Sources

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

A.L. Smith, J.-Y. Colle, O. Beneš, R.J.M. Konings, B. Sundman, C. Guéneau, Thermodynamic assessment of the neptunium–oxygen system: Mass spectrometric studies and thermodynamic modelling, The Journal of Chemical Thermodynamics 103, 257-275 (2016). doi:10.1016/j.jct.2016.07.040
Toru Ogawa, Alloying behaviour among U, Np, Pu and Am predicted with the Brewer valence bond model, Journal of Alloys and Compounds 194, 1-7 (1993). doi:10.1016/0925-8388(93)90636-2

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}
}