# Ho–Sn phases

> Ho–Sn system: 13 phases (tier A 7, tier B 1, tier C 3, liquid 1, needs_review 1); 10 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references.

HTML: https://data.orchid-project.org/phases/pages/HO-SN.html · Markdown: https://data.orchid-project.org/phases/pages/HO-SN.md

13 phases (tier A 7, tier B 1, tier C 3, liquid 1, needs_review 1); 10 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](https://orchid-project.org/phases/?q=HO-SN) · [full JSON](https://data.orchid-project.org/phases/systems/HO-SN.json) · [Ho–Sn system page](https://data.orchid-project.org/systems/HO-SN.html) · [Markdown](https://data.orchid-project.org/phases/pages/HO-SN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Ho–Sn system (13)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [DIAMOND_A4](#phase-ho-sn-a4-diamond); _phase:ho-sn:a4-diamond_ | C (diamond) · A4 · cF8 · Fd-3m (227) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 |
| [BCT_A5](#phase-ho-sn-a5-bct); _phase:ho-sn:a5-bct_ | beta-Sn · A5 · tI4 · I4_1/amd (141) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–505.07 K, x(Sn) 1–1 | 2 | 1 |
| [BCC_A2](#phase-ho-sn-bcc-a2); _phase:ho-sn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 |
| [FCC_A1](#phase-ho-sn-fcc-a1); _phase:ho-sn: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-ho-sn-hcp-a3); _phase:ho-sn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1753.27 K, x(Sn) 0–0.02503 | 2 | 1 |
| [HO11SN10](#phase-ho-sn-ho11sn10); _phase:ho-sn:ho11sn10_ | Ge10Ho11 · tI84 · I4/mmm (139) | tier B: DFT-supported (unique MP + OQMD match) | stable in 1 of 1 calculated diagram(s): 300–1871.14 K, x(Sn) 0.47619–0.47619 | 4 | 1 |
| [HO2SN5](#phase-ho-sn-ho2sn5); _phase:ho-sn:ho2sn5_ | Er2Ge5 · oP14 · Pmmn (59) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–782.01 K, x(Sn) 0.71429–0.71429 | 6 | 1 |
| [HO4SN5](#phase-ho-sn-ho4sn5); _phase:ho-sn:ho4sn5_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–1428.67 K, x(Sn) 0.55556–0.55556 | 4 | 1 |
| [HO5SN3_D88](#phase-ho-sn-ho5sn3-d88); _phase:ho-sn:ho5sn3-d88_ | Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2207.88 K, x(Sn) 0.375–0.375 | 6 | 1 |
| [HO5SN4](#phase-ho-sn-ho5sn4); _phase:ho-sn:ho5sn4_ | Ge4Sm5 · oP36 · Pnma (62) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1987.44 K, x(Sn) 0.44444–0.44444 | 4 | 1 |
| [HOSN2_C49](#phase-ho-sn-hosn2-c49); _phase:ho-sn:hosn2-c49_ | ZrSi2 · C49 · oC12 · Cmcm (63) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1379.69 K, x(Sn) 0.66667–0.66667 | 4 | 1 |
| [HOSN3](#phase-ho-sn-hosn3); _phase:ho-sn:hosn3_ | GdSn2.75 · oC16 · Amm2 (38) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–720.56 K, x(Sn) 0.75–0.75 | 6 | 1 |
| [LIQUID](#phase-ho-sn-liquid); _phase:ho-sn:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 505.07–2500 K, x(Sn) 0–1 | 18 | 1 |

## DIAMOND_A4 (Ho–Sn)

- Id: `phase:ho-sn:a4-diamond`; status `assigned`
- Structure: C (diamond) · A4 · cF8 · Fd-3m (227); type `st:a4-c-diamond-cf8`; tier A: standard phase name; confidence high
- Stoichiometry: Sn 1.0000
- Stability: not stable in 1 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:a4-diamond)

Names (2): _corpus: _corpus:phase:ho-sn:a4-diamond  
_tdb: _tdb:HoSn-14Idd.tdb:DIAMOND_A4  


### TDB models of DIAMOND_A4 (1): PHASE and CONSTITUENT statements as written

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): DIAMOND_A4, type code %, sha256 `41e6877408a408d4…`

~~~~text
44: PHASE DIAMOND_A4 % 1 1 !
45: CONST DIAMOND_A4 : SN : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase_

## BCT_A5 (Ho–Sn)

- Id: `phase:ho-sn:a5-bct`; status `assigned`
- Structure: beta-Sn · A5 · tI4 · I4_1/amd (141); type `st:a5-beta-sn-ti4`; tier A: standard phase name; confidence high
- Stoichiometry: Sn 1.0000
- Stability: stable in 1 of 1 calculated diagram(s): 300–505.07 K, x(Sn) 1–1
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:a5-bct)

Names (4): _corpus: _corpus:phase:ho-sn:a5-bct, corpus:phase:ho-sn:bct-a5  
_paper: _paper:10.1007/s10973-013-3352-4:βSn  
_tdb: _tdb:HoSn-14Idd.tdb:BCT_A5  


### TDB models of BCT_A5 (1): PHASE and CONSTITUENT statements as written

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): BCT_A5, type code %, sha256 `41e6877408a408d4…`

~~~~text
49: PHASE BCT_A5 % 1 1 !
50: CONST BCT_A5 : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_cited as the source of values for this phase_

## BCC_A2 (Ho–Sn)

- Id: `phase:ho-sn:bcc-a2`; status `assigned`
- Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; 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](https://orchid-project.org/phases/#phase:ho-sn:bcc-a2)

Names (2): _corpus: _corpus:phase:ho-sn:bcc-a2  
_tdb: _tdb:HoSn-14Idd.tdb:BCC_A2  


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

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): BCC_A2, type code %B, sha256 `41e6877408a408d4…`

~~~~text
34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : HO SN : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase_

## FCC_A1 (Ho–Sn)

- Id: `phase:ho-sn: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](https://orchid-project.org/phases/#phase:ho-sn:fcc-a1)

Names (2): _corpus: _corpus:phase:ho-sn:fcc-a1  
_tdb: _tdb:HoSn-14Idd.tdb:FCC_A1  


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

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): FCC_A1, type code %A, sha256 `41e6877408a408d4…`

~~~~text
29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : HO SN : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase_

## HCP_A3 (Ho–Sn)

- Id: `phase:ho-sn: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): 300–1753.27 K, x(Sn) 0–0.02503
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:hcp-a3)

Names (3): _corpus: _corpus:phase:ho-sn:hcp-a3  
_paper: _paper:10.1007/s10973-013-3352-4:Ho  
_tdb: _tdb:HoSn-14Idd.tdb:HCP_A3  


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

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): HCP_A3, type code %A, sha256 `41e6877408a408d4…`

~~~~text
39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : HO% SN : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_cited as the source of values for this phase_

## HO11SN10 (Ho–Sn)

- Id: `phase:ho-sn:ho11sn10`; status `assigned`
- Structure: Ge10Ho11 · tI84 · I4/mmm (139); type `st:ge10ho11-ti84`; tier B: DFT-supported (unique MP + OQMD match); confidence high
- Stoichiometry: Ho 0.5238, Sn 0.4762
- Stability: stable in 1 of 1 calculated diagram(s): 300–1871.14 K, x(Sn) 0.47619–0.47619
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:ho11sn10)

Names (5): _corpus: _corpus:phase:ho-sn:ho11sn10  
_mp: _mp:mp-aaacqlzp  
_oqmd: _oqmd:oqmd-2052790  
_paper: _paper:10.1007/s10973-013-3352-4:Sn10Ho11  
_tdb: _tdb:HoSn-14Idd.tdb:HO11SN10  


### TDB models of HO11SN10 (1): PHASE and CONSTITUENT statements as written

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): HO11SN10, type code %, sha256 `41e6877408a408d4…`

~~~~text
64: PHASE HO11SN10 % 2 11 10 !
65: CONST HO11SN10 : HO : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_cited as the source of values for this phase_

## HO2SN5 (Ho–Sn)

- Id: `phase:ho-sn:ho2sn5`; status `assigned`
- Structure: Er2Ge5 · oP14 · Pmmn (59); type `st:er2ge5-op14`; 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](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Ho 0.2857, Sn 0.7143
- Stability: stable in 1 of 1 calculated diagram(s): 300–782.01 K, x(Sn) 0.71429–0.71429
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:ho2sn5)

Names (3): _corpus: _corpus:phase:ho-sn:ho2sn5  
_paper: _paper:10.1007/s10973-013-3352-4:Ho2Sn5  
_tdb: _tdb:HoSn-14Idd.tdb:HO2SN5  


### TDB models of HO2SN5 (1): PHASE and CONSTITUENT statements as written

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): HO2SN5, type code %, sha256 `41e6877408a408d4…`

~~~~text
79: PHASE HO2SN5 % 2 2 5 !
80: CONST HO2SN5 : HO : SN : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_cited as the source of values for this phase_
- [doi:10.1016/0925-8388(93)90859-l](https://doi.org/10.1016/0925-8388%2893%2990859-l) A. Palenzona, P. Manfrinetti, The tin-rich side of the rare earth-tin systems (R = Gd, Tb, Dy, Ho, Er, Tm, Lu and Y), Journal of Alloys and Compounds 201, 43-47 (1993).  
_cited as the source of values for this phase_

## HO4SN5 (Ho–Sn)

- Id: `phase:ho-sn:ho4sn5`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (literature_printed): (Ho4Sn5) · ? — printed with a label mapped to this phase
- Candidate (sgte_mmc2): (Ho4Sn5) — Hallstedt 2025 mmc2 row for HO4SN5: Ho4Sn5
- Stoichiometry: Ho 0.4444, Sn 0.5556
- Stability: stable in 1 of 1 calculated diagram(s): 300–1428.67 K, x(Sn) 0.55556–0.55556
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:ho4sn5)

Names (3): _corpus: _corpus:phase:ho-sn:ho4sn5  
_paper: _paper:10.1007/s10973-013-3352-4:Ho4Sn5  
_tdb: _tdb:HoSn-14Idd.tdb:HO4SN5  


### TDB models of HO4SN5 (1): PHASE and CONSTITUENT statements as written

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): HO4SN5, type code %, sha256 `41e6877408a408d4…`

~~~~text
69: PHASE HO4SN5 % 2 4 5 !
70: CONST HO4SN5 : HO : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_cited as the source of values for this phase_

## HO5SN3_D88 (Ho–Sn)

- Id: `phase:ho-sn:ho5sn3-d88`; status `assigned`
- Structure: Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193); type `st:d8-8-mn5si3-hp16`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaaabtmd and oqmd-17478, space group 193
- Stoichiometry: Ho 0.6250, Sn 0.3750
- Stability: stable in 1 of 1 calculated diagram(s): 300–2207.88 K, x(Sn) 0.375–0.375
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:ho5sn3-d88)

Names (5): _corpus: _corpus:phase:ho-sn:ho5sn3-d88  
_mp: _mp:mp-aaaabtmd  
_oqmd: _oqmd:oqmd-17478  
_paper: _paper:10.1007/s10973-013-3352-4:Ho5Sn3  
_tdb: _tdb:HoSn-14Idd.tdb:HO5SN3_D88  


### TDB models of HO5SN3_D88 (1): PHASE and CONSTITUENT statements as written

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): HO5SN3_D88, type code %, sha256 `41e6877408a408d4…`

~~~~text
54: PHASE HO5SN3_D88 % 2 5 3 !
55: CONST HO5SN3_D88 : HO : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_cited as the source of values for this phase_

## HO5SN4 (Ho–Sn)

- Id: `phase:ho-sn:ho5sn4`; status `assigned`
- Structure: Ge4Sm5 · oP36 · Pnma (62); type `st:ge4sm5-op36`; 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](https://doi.org/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: Ho 0.5556, Sn 0.4444
- Stability: stable in 1 of 1 calculated diagram(s): 300–1987.44 K, x(Sn) 0.44444–0.44444
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:ho5sn4)

Names (3): _corpus: _corpus:phase:ho-sn:ho5sn4  
_paper: _paper:10.1007/s10973-013-3352-4:Ho5Sn4  
_tdb: _tdb:HoSn-14Idd.tdb:HO5SN4  


### TDB models of HO5SN4 (1): PHASE and CONSTITUENT statements as written

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): HO5SN4, type code %, sha256 `41e6877408a408d4…`

~~~~text
59: PHASE HO5SN4 % 2 5 4 !
60: CONST HO5SN4 : HO : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_cited as the source of values for this phase_

## HOSN2_C49 (Ho–Sn)

- Id: `phase:ho-sn:hosn2-c49`; status `assigned`
- Structure: ZrSi2 · C49 · oC12 · Cmcm (63); type `st:c49-zrsi2-oc12`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaacjbcb and oqmd-21414, space group 63
- Stoichiometry: Ho 0.3333, Sn 0.6667
- Stability: stable in 1 of 1 calculated diagram(s): 300–1379.69 K, x(Sn) 0.66667–0.66667
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:hosn2-c49)

Names (5): _corpus: _corpus:phase:ho-sn:hosn2-c49  
_mp: _mp:mp-aaacjbcb  
_oqmd: _oqmd:oqmd-21414  
_paper: _paper:10.1007/s10973-013-3352-4:HoSn2  
_tdb: _tdb:HoSn-14Idd.tdb:HOSN2_C49  


### TDB models of HOSN2_C49 (1): PHASE and CONSTITUENT statements as written

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): HOSN2_C49, type code %, sha256 `41e6877408a408d4…`

~~~~text
74: PHASE HOSN2_C49 % 2 1 2 !
75: CONST HOSN2_C49 : HO : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_cited as the source of values for this phase_

## HOSN3 (Ho–Sn)

- Id: `phase:ho-sn:hosn3`; status `assigned`
- Structure: GdSn2.75 · oC16 · Amm2 (38); type `st:gdsn2-75-oc16`; 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](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Ho 0.2500, Sn 0.7500
- Stability: stable in 1 of 1 calculated diagram(s): 300–720.56 K, x(Sn) 0.75–0.75
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:hosn3)

Names (3): _corpus: _corpus:phase:ho-sn:hosn3  
_paper: _paper:10.1007/s10973-013-3352-4:HoSn3  
_tdb: _tdb:HoSn-14Idd.tdb:HOSN3  


### TDB models of HOSN3 (1): PHASE and CONSTITUENT statements as written

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): HOSN3, type code %, sha256 `41e6877408a408d4…`

~~~~text
84: PHASE HOSN3 % 2 1 3 !
85: CONST HOSN3 : HO : SN : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_cited as the source of values for this phase_
- [doi:10.1016/0925-8388(93)90859-l](https://doi.org/10.1016/0925-8388%2893%2990859-l) A. Palenzona, P. Manfrinetti, The tin-rich side of the rare earth-tin systems (R = Gd, Tb, Dy, Ho, Er, Tm, Lu and Y), Journal of Alloys and Compounds 201, 43-47 (1993).  
_cited as the source of values for this phase_

## LIQUID (Ho–Sn)

- Id: `phase:ho-sn:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 505.07–2500 K, x(Sn) 0–1
- Literature: 18 values (18 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ho-sn:liquid)

Names (3): _corpus: _corpus:phase:ho-sn:liquid  
_paper: _paper:10.1007/s10973-013-3352-4:Liq  
_tdb: _tdb:HoSn-14Idd.tdb:LIQUID  


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

[HoSn-14Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/HoSn-14Idd.tdb): LIQUID, type code %, sha256 `41e6877408a408d4…`

~~~~text
24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : HO SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1007/s10973-013-3352-4](https://doi.org/10.1007/s10973-013-3352-4) A. Iddaoudi, N. Selhaoui, S. Kardellass, M. Ait Amar, K. Mahdouk, H. Najih et al., Thermodynamic optimization of the Ho–Sn system, J Therm Anal Calorim 115, 941-945 (2014).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1361/105497198770342599](https://doi.org/10.1361/105497198770342599) Bulanova MV, Eremenko VN, Petjukh VM, Sidorko VR. The Ho– Sn (Holmium–Tin) System. J Phase Equilib. 1998;19:136–41.  
_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). https://doi.org/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). https://doi.org/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.

```bibtex
@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}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).