Sc–Zn phases

9 phases (tier A 5, tier C 3, liquid 1); 7 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: interactive registry · full JSON · Sc–Zn system page · Markdown · field reference

Phases of the Sc–Zn system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:sc-zn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1607.31–1817.9 K, x(Zn) 0–0.00155	1	1
FCC_A1 phase:sc-zn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
HCP_A3 phase:sc-zn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2499.72 K, x(Zn) 0–1	5	1
LIQUID phase:sc-zn:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 692.22–2500 K, x(Zn) 0–1	15	1
SC13ZN58 phase:sc-zn:sc13zn58	Gd13Zn58 · hP142 · P6_3/mmc (194)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1093.12 K, x(Zn) 0.8169–0.8169	8	1
SC3ZN17 phase:sc-zn:sc3zn17	Be17Ru3 · cI60 · Im-3 (204)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1087.76 K, x(Zn) 0.85–0.85	6	1
SCZN_B2 phase:sc-zn:sczn-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1502.59 K, x(Zn) 0.5–0.5	6	1
SCZN12_D2B phase:sc-zn:sczn12-d2b	Mn12Th · D2_b · tI26 · I4/mmm (139)	tier A: standard phase name	not stable in 1 calculated diagram(s)	4	1
SCZN2 phase:sc-zn:sczn2	Hg2U · hP3 · P6/mmm (191)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1298.04 K, x(Zn) 0.66667–0.66667	8	1

BCC_A2 (Sc–Zn)

Id: phase:sc-zn:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1607.31–1817.9 K, x(Zn) 0–0.00155
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:sc-zn:bcc-a2
paper: paper:10.2298/jmmb110909017t:βSc
tdb: tdb:ScZn-12Tan.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

ScZn-12Tan.tdb: BCC_A2, type code %B, sha256 7b51650bade528a1…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : SC% ZN : VA% : !

Example references (1 of 1; assessments first):

doi:10.2298/JMMB110909017T C. Tang, P. Zhou, D.D. Zhao, X.M. Yuan, Y. Tang, P.S. Wang, B. Hu, Y. Du, H.H. Xu, J. Mining Metall. B, 48, 123-30(2012).
assessment that models this phase; reports values for this phase

FCC_A1 (Sc–Zn)

Id: phase:sc-zn:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:sc-zn:fcc-a1
tdb: tdb:ScZn-12Tan.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

ScZn-12Tan.tdb: FCC_A1, type code %A, sha256 7b51650bade528a1…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : SC ZN : VA% : !

Example references (1 of 1; assessments first):

doi:10.2298/JMMB110909017T C. Tang, P. Zhou, D.D. Zhao, X.M. Yuan, Y. Tang, P.S. Wang, B. Hu, Y. Du, H.H. Xu, J. Mining Metall. B, 48, 123-30(2012).
assessment that models this phase

HCP_A3 (Sc–Zn)

Id: phase:sc-zn:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–2499.72 K, x(Zn) 0–1
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:sc-zn:hcp-a3
paper: paper:10.2298/jmmb110909017t:(Zn), paper:10.2298/jmmb110909017t:Hcp_A3, paper:10.2298/jmmb110909017t:αSc
tdb: tdb:ScZn-12Tan.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

ScZn-12Tan.tdb: HCP_A3, type code %A, sha256 7b51650bade528a1…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : SC% ZN% : VA% : !

Example references (2 of 2; assessments first):

doi:10.2298/JMMB110909017T C. Tang, P. Zhou, D.D. Zhao, X.M. Yuan, Y. Tang, P.S. Wang, B. Hu, Y. Du, H.H. Xu, J. Mining Metall. B, 48, 123-30(2012).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(96)02576-5 A. Palenzona, P. Manfrinetti, J. Alloy. Compd.¬, 247 (1997) 195.
cited as the source of values for this phase

LIQUID (Sc–Zn)

Id: phase:sc-zn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 692.22–2500 K, x(Zn) 0–1
Literature: 15 values (15 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:sc-zn:liquid
paper: paper:10.2298/jmmb110909017t:L
tdb: tdb:ScZn-12Tan.tdb:LIQUID

TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written

ScZn-12Tan.tdb: LIQUID, type code %, sha256 7b51650bade528a1…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : SC ZN : !

Example references (2 of 2; assessments first):

doi:10.2298/JMMB110909017T C. Tang, P. Zhou, D.D. Zhao, X.M. Yuan, Y. Tang, P.S. Wang, B. Hu, Y. Du, H.H. Xu, J. Mining Metall. B, 48, 123-30(2012).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(96)02576-5 A. Palenzona, P. Manfrinetti, J. Alloy. Compd.¬, 247 (1997) 195.
cited as the source of values for this phase

SC13ZN58 (Sc–Zn)

Id: phase:sc-zn:sc13zn58; status assigned
Structure: Gd13Zn58 · hP142 · P6_3/mmc (194); type st:gd13zn58-hp142; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Sc 0.1831, Zn 0.8169
Stability: stable in 1 of 1 calculated diagram(s): 300–1093.12 K, x(Zn) 0.8169–0.8169
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:sc-zn:sc13zn58
paper: paper:10.2298/jmmb110909017t:Sc13Zn58
tdb: tdb:ScZn-12Tan.tdb:SC13ZN58

TDB models of SC13ZN58 (1): PHASE and CONSTITUENT statements as written

ScZn-12Tan.tdb: SC13ZN58, type code %, sha256 7b51650bade528a1…

51: PHASE SC13ZN58 % 2 13 58 !
52: CONST SC13ZN58 : SC : ZN : !

Example references (2 of 2; assessments first):

doi:10.2298/JMMB110909017T C. Tang, P. Zhou, D.D. Zhao, X.M. Yuan, Y. Tang, P.S. Wang, B. Hu, Y. Du, H.H. Xu, J. Mining Metall. B, 48, 123-30(2012).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(96)02576-5 A. Palenzona, P. Manfrinetti, J. Alloy. Compd.¬, 247 (1997) 195.
cited as the source of values for this phase

SC3ZN17 (Sc–Zn)

Id: phase:sc-zn:sc3zn17; status assigned
Structure: Be17Ru3 · cI60 · Im-3 (204); type st:be17ru3-ci60; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Sc 0.1500, Zn 0.8500
Stability: stable in 1 of 1 calculated diagram(s): 300–1087.76 K, x(Zn) 0.85–0.85
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:sc-zn:sc3zn17
paper: paper:10.2298/jmmb110909017t:Sc3Zn17
tdb: tdb:ScZn-12Tan.tdb:SC3ZN17

TDB models of SC3ZN17 (1): PHASE and CONSTITUENT statements as written

ScZn-12Tan.tdb: SC3ZN17, type code %, sha256 7b51650bade528a1…

56: PHASE SC3ZN17 % 2 3 17 !
57: CONST SC3ZN17 : SC : ZN : !

Example references (2 of 2; assessments first):

doi:10.2298/JMMB110909017T C. Tang, P. Zhou, D.D. Zhao, X.M. Yuan, Y. Tang, P.S. Wang, B. Hu, Y. Du, H.H. Xu, J. Mining Metall. B, 48, 123-30(2012).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(96)02576-5 A. Palenzona, P. Manfrinetti, J. Alloy. Compd.¬, 247 (1997) 195.
cited as the source of values for this phase

SCZN_B2 (Sc–Zn)

Id: phase:sc-zn:sczn-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaarcw and oqmd-18106, space group 221
Stoichiometry: Sc 0.5000, Zn 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1502.59 K, x(Zn) 0.5–0.5
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:sc-zn:sczn-b2
mp: mp:mp-aaaaarcw
oqmd: oqmd:oqmd-18106
paper: paper:10.2298/jmmb110909017t:ScZn
tdb: tdb:ScZn-12Tan.tdb:SCZN_B2

TDB models of SCZN_B2 (1): PHASE and CONSTITUENT statements as written

ScZn-12Tan.tdb: SCZN_B2, type code %, sha256 7b51650bade528a1…

41: PHASE SCZN_B2 % 2 1 1 !
42: CONST SCZN_B2 : SC : ZN : !

Example references (2 of 2; assessments first):

doi:10.2298/JMMB110909017T C. Tang, P. Zhou, D.D. Zhao, X.M. Yuan, Y. Tang, P.S. Wang, B. Hu, Y. Du, H.H. Xu, J. Mining Metall. B, 48, 123-30(2012).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(96)02576-5 A. Palenzona, P. Manfrinetti, J. Alloy. Compd.¬, 247 (1997) 195.
cited as the source of values for this phase

SCZN12_D2B (Sc–Zn)

Id: phase:sc-zn:sczn12-d2b; status assigned
Structure: Mn12Th · D2_b · tI26 · I4/mmm (139); type st:d2-b-mn12th-ti26; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaarcx and oqmd-18107, space group 139
Stoichiometry: Sc 0.0769, Zn 0.9231
Stability: not stable in 1 calculated diagram(s)
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:sc-zn:sczn12-d2b
mp: mp:mp-aaaaarcx
oqmd: oqmd:oqmd-18107
paper: paper:10.2298/jmmb110909017t:ScZn12
tdb: tdb:ScZn-12Tan.tdb:SCZN12_D2B

TDB models of SCZN12_D2B (1): PHASE and CONSTITUENT statements as written

ScZn-12Tan.tdb: SCZN12_D2B, type code %, sha256 7b51650bade528a1…

61: PHASE SCZN12_D2B % 2 1 12 !
62: CONST SCZN12_D2B : SC : ZN : !

Example references (2 of 2; assessments first):

doi:10.2298/JMMB110909017T C. Tang, P. Zhou, D.D. Zhao, X.M. Yuan, Y. Tang, P.S. Wang, B. Hu, Y. Du, H.H. Xu, J. Mining Metall. B, 48, 123-30(2012).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(96)02576-5 A. Palenzona, P. Manfrinetti, J. Alloy. Compd.¬, 247 (1997) 195.
cited as the source of values for this phase

SCZN2 (Sc–Zn)

Id: phase:sc-zn:sczn2; status assigned
Structure: Hg2U · hP3 · P6/mmm (191); type st:hg2u-hp3; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (mp_oqmd_space_groups_differ, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Sc 0.3333, Zn 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–1298.04 K, x(Zn) 0.66667–0.66667
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:sc-zn:sczn2
paper: paper:10.2298/jmmb110909017t:ScZn2
tdb: tdb:ScZn-12Tan.tdb:SCZN2

TDB models of SCZN2 (1): PHASE and CONSTITUENT statements as written

ScZn-12Tan.tdb: SCZN2, type code %, sha256 7b51650bade528a1…

46: PHASE SCZN2 % 2 1 2 !
47: CONST SCZN2 : SC : ZN : !

Example references (2 of 2; assessments first):

doi:10.2298/JMMB110909017T C. Tang, P. Zhou, D.D. Zhao, X.M. Yuan, Y. Tang, P.S. Wang, B. Hu, Y. Du, H.H. Xu, J. Mining Metall. B, 48, 123-30(2012).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(96)02576-5 A. Palenzona, P. Manfrinetti, J. Alloy. Compd.¬, 247 (1997) 195.
cited as the source of values for this phase

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735970
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 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); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). 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_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  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}
}