Pd–Sm phases

14 phases (tier A 7, tier B 1, tier C 1, liquid 1, needs_review 4); 14 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 · Pd–Sm system page · Markdown · field reference

Phases of the Pd–Sm system (14)
Phase	Structure	Basis	Stability (calculated)	TDB models
BCC_A2 phase:pd-sm:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1010.07–1345 K, x(Sm) 0.99948–1	1
FCC_A1 phase:pd-sm:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1930.77 K, x(Sm) 0–0.10385	1
HCP_A3 phase:pd-sm:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 960–1228 K, x(Sm) 0.98904–1	1
LIQUID phase:pd-sm:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 964.99–2500 K, x(Sm) 0–1	1
PD21SM10 phase:pd-sm:pd21sm10	Pd21Sm10 · mC124 · C2/m (12)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1432.81 K, x(Sm) 0.32258–0.32258	1
PD2SM3 phase:pd-sm:pd2sm3		needs_review	stable in 1 of 1 calculated diagram(s): 300–1067.02 K, x(Sm) 0.6–0.6	1
PD3SM_L12 phase:pd-sm:pd3sm-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1891.59 K, x(Sm) 0.22758–0.25	1
PD3SM7_D102 phase:pd-sm:pd3sm7-d102	Fe3Th7 · D10_2 · hP20 · P6_3mc (186)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1002.9 K, x(Sm) 0.7–0.7	1
PD4SM3 phase:pd-sm:pd4sm3	Pd4Pu3 · hR14 · R-3 (148)	tier B: DFT-supported (unique MP + OQMD match)	stable in 1 of 1 calculated diagram(s): 300–1533.62 K, x(Sm) 0.42857–0.42857	1
PD5SM phase:pd-sm:pd5sm		needs_review	stable in 1 of 1 calculated diagram(s): 300–1392.84 K, x(Sm) 0.16667–0.16667	1
PD7SM phase:pd-sm:pd7sm		needs_review	stable in 1 of 1 calculated diagram(s): 300–820.12 K, x(Sm) 0.125–0.125	1
PDSM_B33 phase:pd-sm:pdsm-b33	CrB · B33 · oC8 · Cmcm (63)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1253.58 K, x(Sm) 0.5–0.50904	1
PDSM_BETA phase:pd-sm:pdsm-beta		needs_review	stable in 1 of 1 calculated diagram(s): 1231.81–1543.39 K, x(Sm) 0.5–0.5044	1
RHOMB_C19 phase:pd-sm:rhomb-c19	CdCl2 · C19 · hR3 · R-3m (166)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1205.88 K, x(Sm) 0.99262–1	1

BCC_A2 (Pd–Sm)

Id: phase:pd-sm: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): 1010.07–1345 K, x(Sm) 0.99948–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:bcc-a2
tdb: tdb:PdSm-00Du-LB.tdb:BCC_A2

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

PdSm-00Du-LB.tdb: BCC_A2, type code %B, sha256 373deba349e8638b…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : PD SM% : VA : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

FCC_A1 (Pd–Sm)

Id: phase:pd-sm:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1930.77 K, x(Sm) 0–0.10385
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:fcc-a1
tdb: tdb:PdSm-00Du-LB.tdb:FCC_A1

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

PdSm-00Du-LB.tdb: FCC_A1, type code %A, sha256 373deba349e8638b…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : PD% SM : VA : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

HCP_A3 (Pd–Sm)

Id: phase:pd-sm: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): 960–1228 K, x(Sm) 0.98904–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:hcp-a3
tdb: tdb:PdSm-00Du-LB.tdb:HCP_A3

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

PdSm-00Du-LB.tdb: HCP_A3, type code %A, sha256 373deba349e8638b…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : PD SM% : VA : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

LIQUID (Pd–Sm)

Id: phase:pd-sm:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 964.99–2500 K, x(Sm) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:liquid
tdb: tdb:PdSm-00Du-LB.tdb:LIQUID

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

PdSm-00Du-LB.tdb: LIQUID, type code %, sha256 373deba349e8638b…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : PD SM : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

PD21SM10 (Pd–Sm)

Id: phase:pd-sm:pd21sm10; status assigned
Structure: Pd21Sm10 · mC124 · C2/m (12); type st:pd21sm10-mc124; 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_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Pd 0.6774, Sm 0.3226
Stability: stable in 1 of 1 calculated diagram(s): 300–1432.81 K, x(Sm) 0.32258–0.32258
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:pd21sm10
tdb: tdb:PdSm-00Du-LB.tdb:PD21SM10

TDB models of PD21SM10 (1): PHASE and CONSTITUENT statements as written

PdSm-00Du-LB.tdb: PD21SM10, type code %, sha256 373deba349e8638b…

62: PHASE PD21SM10 % 2 21 10 !
63: CONST PD21SM10 : PD : SM : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

PD2SM3 (Pd–Sm)

Id: phase:pd-sm:pd2sm3; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (sgte_mmc2): (Pd2Sm3) — Hallstedt 2025 mmc2 row for PD2SM3: Pd2Sm3
Stoichiometry: Pd 0.4000, Sm 0.6000
Stability: stable in 1 of 1 calculated diagram(s): 300–1067.02 K, x(Sm) 0.6–0.6
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:pd2sm3
tdb: tdb:PdSm-00Du-LB.tdb:PD2SM3

TDB models of PD2SM3 (1): PHASE and CONSTITUENT statements as written

PdSm-00Du-LB.tdb: PD2SM3, type code %, sha256 373deba349e8638b…

82: PHASE PD2SM3 % 2 2 3 !
83: CONST PD2SM3 : PD : SM : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

PD3SM_L12 (Pd–Sm)

Id: phase:pd-sm:pd3sm-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1891.59 K, x(Sm) 0.22758–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:pd3sm-l12
tdb: tdb:PdSm-00Du-LB.tdb:PD3SM_L12

TDB models of PD3SM_L12 (1): PHASE and CONSTITUENT statements as written

PdSm-00Du-LB.tdb: PD3SM_L12, type code %, sha256 373deba349e8638b…

57: PHASE PD3SM_L12 % 2 3 1 !
58: CONST PD3SM_L12 : PD : PD SM% : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

PD3SM7_D102 (Pd–Sm)

Id: phase:pd-sm:pd3sm7-d102; status assigned
Structure: Fe3Th7 · D10_2 · hP20 · P6_3mc (186); type st:d10-2-fe3th7-hp20; tier A: standard phase name; confidence high
Stoichiometry: Pd 0.3000, Sm 0.7000
Stability: stable in 1 of 1 calculated diagram(s): 300–1002.9 K, x(Sm) 0.7–0.7
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:pd3sm7-d102
tdb: tdb:PdSm-00Du-LB.tdb:PD3SM7_D102

TDB models of PD3SM7_D102 (1): PHASE and CONSTITUENT statements as written

PdSm-00Du-LB.tdb: PD3SM7_D102, type code %, sha256 373deba349e8638b…

87: PHASE PD3SM7_D102 % 2 3 7 !
88: CONST PD3SM7_D102 : PD : SM : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

PD4SM3 (Pd–Sm)

Id: phase:pd-sm:pd4sm3; status assigned
Structure: Pd4Pu3 · hR14 · R-3 (148); type st:pd4pu3-hr14; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Pd 0.5714, Sm 0.4286
Stability: stable in 1 of 1 calculated diagram(s): 300–1533.62 K, x(Sm) 0.42857–0.42857
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:pd-sm:pd4sm3
mp: mp:mp-aaackvpn
oqmd: oqmd:oqmd-1437087
tdb: tdb:PdSm-00Du-LB.tdb:PD4SM3

TDB models of PD4SM3 (1): PHASE and CONSTITUENT statements as written

PdSm-00Du-LB.tdb: PD4SM3, type code %, sha256 373deba349e8638b…

67: PHASE PD4SM3 % 2 4 3 !
68: CONST PD4SM3 : PD : SM : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

PD5SM (Pd–Sm)

Id: phase:pd-sm:pd5sm; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (sgte_mmc2): (Pd5Sm) — Hallstedt 2025 mmc2 row for PD5SM: Pd5Sm
Stoichiometry: Pd 0.8333, Sm 0.1667
Stability: stable in 1 of 1 calculated diagram(s): 300–1392.84 K, x(Sm) 0.16667–0.16667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:pd5sm
tdb: tdb:PdSm-00Du-LB.tdb:PD5SM

TDB models of PD5SM (1): PHASE and CONSTITUENT statements as written

PdSm-00Du-LB.tdb: PD5SM, type code %, sha256 373deba349e8638b…

52: PHASE PD5SM % 2 5 1 !
53: CONST PD5SM : PD : SM : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

PD7SM (Pd–Sm)

Id: phase:pd-sm:pd7sm; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (sgte_mmc2): (Pd7Sm) — Hallstedt 2025 mmc2 row for PD7SM: Pd7Sm
Stoichiometry: Pd 0.8750, Sm 0.1250
Stability: stable in 1 of 1 calculated diagram(s): 300–820.12 K, x(Sm) 0.125–0.125
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:pd7sm
tdb: tdb:PdSm-00Du-LB.tdb:PD7SM

TDB models of PD7SM (1): PHASE and CONSTITUENT statements as written

PdSm-00Du-LB.tdb: PD7SM, type code %, sha256 373deba349e8638b…

47: PHASE PD7SM % 2 7 1 !
48: CONST PD7SM : PD : SM : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

PDSM_B33 (Pd–Sm)

Id: phase:pd-sm:pdsm-b33; status assigned
Structure: CrB · B33 · oC8 · Cmcm (63); type st:b33-crb-oc8; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1253.58 K, x(Sm) 0.5–0.50904
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:pdsm-b33
tdb: tdb:PdSm-00Du-LB.tdb:PDSM_B33

TDB models of PDSM_B33 (1): PHASE and CONSTITUENT statements as written

PdSm-00Du-LB.tdb: PDSM_B33, type code %, sha256 373deba349e8638b…

77: PHASE PDSM_B33 % 2 1 1 !
78: CONST PDSM_B33 : PD% SM : SM : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

PDSM_BETA (Pd–Sm)

Id: phase:pd-sm:pdsm-beta; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (dft_mp): Cmcm (63) — on-hull MP SmPd at x(SM)=0.5000
Candidate (dft_oqmd): Cmcm (63) — on-hull OQMD Pd1 Sm1 at x(SM)=0.5000
Candidate (sgte_mmc2): (PdSm-beta) — Hallstedt 2025 mmc2 row for PDSM_BETA: PdSm-beta
Stability: stable in 1 of 1 calculated diagram(s): 1231.81–1543.39 K, x(Sm) 0.5–0.5044
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:pdsm-beta
tdb: tdb:PdSm-00Du-LB.tdb:PDSM_BETA

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

PdSm-00Du-LB.tdb: PDSM_BETA, type code %, sha256 373deba349e8638b…

72: PHASE PDSM_BETA % 2 1 1 !
73: CONST PDSM_BETA : PD% SM : SM : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models this phase

RHOMB_C19 (Pd–Sm)

Id: phase:pd-sm:rhomb-c19; status assigned
Structure: CdCl2 · C19 · hR3 · R-3m (166); type st:c19-cdcl2-hr3; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1205.88 K, x(Sm) 0.99262–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pd-sm:rhomb-c19
tdb: tdb:PdSm-00Du-LB.tdb:RHOMB_C19

TDB models of RHOMB_C19 (1): PHASE and CONSTITUENT statements as written

PdSm-00Du-LB.tdb: RHOMB_C19, type code %, sha256 373deba349e8638b…

42: PHASE RHOMB_C19 % 1 1 !
43: CONST RHOMB_C19 : PD SM% : !

Example references (1 of 1; assessments first):

doi:10.1515/ijmr-2000-910603 Z. Du, H. Yang, Z. Metallkd., 91, 455-59(2000).
assessment that models 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}
}