Ho system

11 accepted literature values from 5 paper(s) (experimental 4, model 2, DFT 4, unspecified 1); 0 calculated phase diagram(s). 1 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	4
model	2
DFT	4
unspecified	1

Accepted values by property group
Property group	Values
phase transition	2
formation	2
crystal structure	7

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, Ho system (2)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location	Quote
Ho (fcc)		-1.18 kJ/mol-atom	0	DFT			[1] Dong 2012 cites Wang 2004 doi	Table 1, p. 2, row 2 report
Ho (fcc)		-1.18 kJ/mol-atom	0	DFT			[1] Dong 2012	Table 1, p. 2, row 1 report

Other properties

Phase transition (2)

Phase transition, Ho system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1703 K	1703	polymorphic: Ho alloy: Ho 1	model	[2] Norgren 2000 cites Norgren	Table 1, p. 4, row 19 report
Phase transition	1713.15 K	1713.15	polymorphic: (βHo) ↔ (αHo) (βHo): Ho 1	unspecified	[3] Kardellass 2014 cites Kubaschewski 1982	Table 1, p. 2, row 12 report

Crystal structure (7)

Crystal structure, Ho system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	3.548 Å	0	(Ho) (Ho): Ho 1	DFT	[4] Ghamri 2013	Table 1, p. 2, row 2 report
Lattice a	3.58 Å	298.15	(Ho) (Ho): Ho 1	experimental	[4] Ghamri 2013 cites Harris 1985 doi	Table 1, p. 2, row 1 report
Lattice a printed: a	4.967 Å	298.15	Ho (fcc) alloy: Ho 1	model	[1] Dong 2012	Table 1, p. 2, row 3 report
Lattice a	3.58 Å	298.15	hcp(Ho) alloy: Ho 1	experimental	[5] Cui 2023 cites Spedding 1961 doi	Table 1, p. 2, row 5 report
Lattice c	5.82 Å	0	(Ho) (Ho): Ho 1	DFT	[4] Ghamri 2013	Table 1, p. 2, row 2 report
Lattice c	5.62 Å	298.15	(Ho) (Ho): Ho 1	experimental	[4] Ghamri 2013 cites Harris 1985 doi	Table 1, p. 2, row 1 report
Lattice c	5.62 Å	298.15	hcp(Ho) alloy: Ho 1	experimental	[5] Cui 2023 cites Spedding 1961 doi	Table 1, p. 2, row 5 report

Sources

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

H.Q. Dong, X.M. Tao, T. Laurila, M. Paulasto-Kröckel, Thermodynamic assessment of Au–Ho and Au–Tm binary systems, Calphad 37, 87-93 (2012). doi:10.1016/j.calphad.2012.02.002
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
S. Kardellass, C. Servant, N. Selhaoui, A. Iddaoudi, M. Ait Amar, L. Bouirden, A thermodynamic assessment of the Iron+Holmium phase diagram, The Journal of Chemical Thermodynamics 74, 78-84 (2014). doi:10.1016/j.jct.2013.11.037
H. Ghamri, A. Belgacem-Bouzida, Y. Djaballah, A. Hidoussi, Thermodynamic assessment of the Ho–Te system supported by ab initio calculations, Journal of Alloys and Compounds 552, 387-391 (2013). doi:10.1016/j.jallcom.2012.11.084
Dongyu Cui, Jiong Wang, Jiaqiang Zhou, Thermodynamic Modeling of the Te-X (X = Gd, Dy, Ho) Binary Systems Combined with the First-Principles Method, J. Phase Equilib. Diffus. 44, 456-467 (2023). doi:10.1007/s11669-023-01051-1

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}
}