# Ca–Sn phases

> Ca–Sn system: 13 phases (tier A 9, tier B 1, tier C 2, liquid 1); 11 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/CA-SN.html · Markdown: https://data.orchid-project.org/phases/pages/CA-SN.md

13 phases (tier A 9, tier B 1, tier C 2, liquid 1); 11 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=CA-SN) · [full JSON](https://data.orchid-project.org/phases/systems/CA-SN.json) · [Ca–Sn system page](https://data.orchid-project.org/systems/CA-SN.html) · [Markdown](https://data.orchid-project.org/phases/pages/CA-SN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

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

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [DIAMOND_A4](#phase-ca-sn-a4-diamond); _phase:ca-sn:a4-diamond_ | C (diamond) · A4 · cF8 · Fd-3m (227) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 |
| [BCT_A5](#phase-ca-sn-a5-bct); _phase:ca-sn:a5-bct_ | beta-Sn · A5 · tI4 · I4_1/amd (141) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–505.08 K, x(Sn) 1–1 | 0 | 2 |
| [BCC_A2](#phase-ca-sn-bcc-a2); _phase:ca-sn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 716.03–1115 K, x(Sn) 0–0 | 0 | 2 |
| [CA2SN_C37](#phase-ca-sn-ca2sn-c37); _phase:ca-sn:ca2sn-c37_ | Co2Si · C37 · oP12 · Pnma (62) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1608.73 K, x(Sn) 0.33333–0.33333 | 6 | 2 |
| [CA31SN20](#phase-ca-sn-ca31sn20); _phase:ca-sn:ca31sn20_ | Pt20Pu31 · tI204 · I4/mcm (140) | tier B: DFT-supported (unique MP + OQMD match) | stable in 2 of 2 calculated diagram(s): 300–1390.37 K, x(Sn) 0.39216–0.39216 | 6 | 2 |
| [CA36SN23](#phase-ca-sn-ca36sn23); _phase:ca-sn:ca36sn23_ | Sn23Yb36 · tP118 · P4/mbm (127) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1400.63 K, x(Sn) 0.38983–0.38983 | 6 | 2 |
| [CA5SN3_D8L](#phase-ca-sn-ca5sn3-d8l); _phase:ca-sn:ca5sn3-d8l_ | Cr5B3 · D8_l · tI32 · I4/mcm (140) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1409.61 K, x(Sn) 0.375–0.375 | 4 | 2 |
| [CA7SN6](#phase-ca-sn-ca7sn6); _phase:ca-sn:ca7sn6_ | Ca7Sn6 · oP52 · Pnma (62) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1274.51 K, x(Sn) 0.46154–0.46154 | 7 | 2 |
| [CASN_B33](#phase-ca-sn-casn-b33); _phase:ca-sn:casn-b33_ | CrB · B33 · oC8 · Cmcm (63) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1282.46 K, x(Sn) 0.5–0.5 | 6 | 2 |
| [CASN3_L12](#phase-ca-sn-casn3-l12); _phase:ca-sn:casn3-l12_ | AuCu3 · L1_2 · cP4 · Pm-3m (221) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–904.29 K, x(Sn) 0.75–0.75 | 6 | 2 |
| [FCC_A1](#phase-ca-sn-fcc-a1); _phase:ca-sn:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–716.03 K, x(Sn) 0–0 | 0 | 2 |
| [HCP_A3](#phase-ca-sn-hcp-a3); _phase:ca-sn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 |
| [LIQUID](#phase-ca-sn-liquid); _phase:ca-sn:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 499.29–2500 K, x(Sn) 0–1 | 1 | 2 |

## DIAMOND_A4 (Ca–Sn)

- Id: `phase:ca-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 2 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:a4-diamond)

Names (3): _corpus: _corpus:phase:ca-sn:a4-diamond  
_tdb: _tdb:CaSn-05Car.tdb:DIAMOND_A4, tdb:CaSn-06Ohn.tdb:DIAMOND_A4  


### TDB models of DIAMOND_A4 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): DIAMOND_A4, type code %, sha256 `b3f8ddc2d6b985ad…`

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

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): DIAMOND_A4, type code %, sha256 `e68b6471da20d657…`

~~~~text
49: PHASE DIAMOND_A4 % 1 1 !
50: CONST DIAMOND_A4 : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_

## BCT_A5 (Ca–Sn)

- Id: `phase:ca-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
- Stability: stable in 2 of 2 calculated diagram(s): 300–505.08 K, x(Sn) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:a5-bct)

Names (3): _corpus: _corpus:phase:ca-sn:a5-bct  
_tdb: _tdb:CaSn-05Car.tdb:BCT_A5, tdb:CaSn-06Ohn.tdb:BCT_A5  


### TDB models of BCT_A5 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): BCT_A5, type code %, sha256 `b3f8ddc2d6b985ad…`

~~~~text
50: PHASE BCT_A5 % 1 1 !
51: CONST BCT_A5 : CA SN% : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): BCT_A5, type code %, sha256 `e68b6471da20d657…`

~~~~text
54: PHASE BCT_A5 % 1 1 !
55: CONST BCT_A5 : CA SN% : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_

## BCC_A2 (Ca–Sn)

- Id: `phase:ca-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: stable in 2 of 2 calculated diagram(s): 716.03–1115 K, x(Sn) 0–0
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:bcc-a2)

Names (3): _corpus: _corpus:phase:ca-sn:bcc-a2  
_tdb: _tdb:CaSn-05Car.tdb:BCC_A2, tdb:CaSn-06Ohn.tdb:BCC_A2  


### TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): BCC_A2, type code %B, sha256 `b3f8ddc2d6b985ad…`

~~~~text
35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : CA% SN : VA : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): BCC_A2, type code %B, sha256 `e68b6471da20d657…`

~~~~text
39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : CA% SN : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_

## CA2SN_C37 (Ca–Sn)

- Id: `phase:ca-sn:ca2sn-c37`; status `assigned`
- Structure: Co2Si · C37 · oP12 · Pnma (62); type `st:c37-co2si-op12`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaaabhql and oqmd-11004, space group 62
- Stoichiometry: Ca 0.6667, Sn 0.3333
- Stability: stable in 2 of 2 calculated diagram(s): 300–1608.73 K, x(Sn) 0.33333–0.33333
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:ca2sn-c37)

Names (6): _corpus: _corpus:phase:ca-sn:ca2sn-c37  
_mp: _mp:mp-aaaabhql  
_oqmd: _oqmd:oqmd-11004  
_paper: _paper:10.1016/j.actamat.2006.06.017:Ca2Sn  
_tdb: _tdb:CaSn-05Car.tdb:CA2SN_C37, tdb:CaSn-06Ohn.tdb:CA2SN_C37  


### TDB models of CA2SN_C37 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): CA2SN_C37, type code %, sha256 `b3f8ddc2d6b985ad…`

~~~~text
55: PHASE CA2SN_C37 % 2 2 1 !
56: CONST CA2SN_C37 : CA : SN : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): CA2SN_C37, type code %, sha256 `e68b6471da20d657…`

~~~~text
59: PHASE CA2SN_C37 % 2 2 1 !
60: CONST CA2SN_C37 : CA : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_

## CA31SN20 (Ca–Sn)

- Id: `phase:ca-sn:ca31sn20`; status `assigned`
- Structure: Pt20Pu31 · tI204 · I4/mcm (140); type `st:pt20pu31-ti204`; tier B: DFT-supported (unique MP + OQMD match); confidence high
- Stoichiometry: Ca 0.6078, Sn 0.3922
- Stability: stable in 2 of 2 calculated diagram(s): 300–1390.37 K, x(Sn) 0.39216–0.39216
- Literature: 6 values (6 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:ca31sn20)

Names (7): _corpus: _corpus:phase:ca-sn:ca31sn20  
_mp: _mp:mp-aaabmsjm  
_oqmd: _oqmd:oqmd-32622  
_paper: _paper:10.1016/j.actamat.2006.06.017:Ca31Sn20, paper:10.1016/j.intermet.2007.10.010:Ca31Sn20  
_tdb: _tdb:CaSn-05Car.tdb:CA31SN20, tdb:CaSn-06Ohn.tdb:CA31SN20  


### TDB models of CA31SN20 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): CA31SN20, type code %, sha256 `b3f8ddc2d6b985ad…`

~~~~text
70: PHASE CA31SN20 % 2 31 20 !
71: CONST CA31SN20 : CA : SN : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): CA31SN20, type code %, sha256 `e68b6471da20d657…`

~~~~text
74: PHASE CA31SN20 % 2 31 20 !
75: CONST CA31SN20 : CA : SN : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_
- [doi:10.1016/j.intermet.2007.10.010](https://doi.org/10.1016/j.intermet.2007.10.010) A. Kozlov, M. Ohno, R. Arroyave, Z.K. Liu, R. Schmid-Fetzer, Phase equilibria, thermodynamics and solidification microstructures of Mg–Sn–Ca alloys, Part 1: Experimental investigation and thermodynamic modeling of the ternary Mg–Sn–Ca system, Intermetallics 16, 299-315 (2008).  
_reports values for this phase_

## CA36SN23 (Ca–Sn)

- Id: `phase:ca-sn:ca36sn23`; status `assigned`
- Structure: Sn23Yb36 · tP118 · P4/mbm (127); type `st:sn23yb36-tp118`; 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: Ca 0.6102, Sn 0.3898
- Stability: stable in 2 of 2 calculated diagram(s): 300–1400.63 K, x(Sn) 0.38983–0.38983
- Literature: 6 values (6 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:ca36sn23)

Names (5): _corpus: _corpus:phase:ca-sn:ca36sn23  
_paper: _paper:10.1016/j.actamat.2006.06.017:Ca36Sn23, paper:10.1016/j.intermet.2007.10.010:Ca36Sn23  
_tdb: _tdb:CaSn-05Car.tdb:CA36SN23, tdb:CaSn-06Ohn.tdb:CA36SN23  


### TDB models of CA36SN23 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): CA36SN23, type code %, sha256 `b3f8ddc2d6b985ad…`

~~~~text
65: PHASE CA36SN23 % 2 36 23 !
66: CONST CA36SN23 : CA : SN : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): CA36SN23, type code %, sha256 `e68b6471da20d657…`

~~~~text
69: PHASE CA36SN23 % 2 36 23 !
70: CONST CA36SN23 : CA : SN : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_
- [doi:10.1016/j.intermet.2007.10.010](https://doi.org/10.1016/j.intermet.2007.10.010) A. Kozlov, M. Ohno, R. Arroyave, Z.K. Liu, R. Schmid-Fetzer, Phase equilibria, thermodynamics and solidification microstructures of Mg–Sn–Ca alloys, Part 1: Experimental investigation and thermodynamic modeling of the ternary Mg–Sn–Ca system, Intermetallics 16, 299-315 (2008).  
_reports values for this phase_

## CA5SN3_D8L (Ca–Sn)

- Id: `phase:ca-sn:ca5sn3-d8l`; status `assigned`
- Structure: Cr5B3 · D8_l · tI32 · I4/mcm (140); type `st:d8-l-cr5b3-ti32`; tier A: standard phase name; confidence high
- Stoichiometry: Ca 0.6250, Sn 0.3750
- Stability: stable in 2 of 2 calculated diagram(s): 300–1409.61 K, x(Sn) 0.375–0.375
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:ca5sn3-d8l)

Names (4): _corpus: _corpus:phase:ca-sn:ca5sn3-d8l  
_paper: _paper:10.1016/j.actamat.2006.06.017:Ca5Sn3  
_tdb: _tdb:CaSn-05Car.tdb:CA5SN3_D8L, tdb:CaSn-06Ohn.tdb:CA5SN3_D8L  


### TDB models of CA5SN3_D8L (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): CA5SN3_D8L, type code %, sha256 `b3f8ddc2d6b985ad…`

~~~~text
60: PHASE CA5SN3_D8L % 2 5 3 !
61: CONST CA5SN3_D8L : CA : SN : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): CA5SN3_D8L, type code %, sha256 `e68b6471da20d657…`

~~~~text
64: PHASE CA5SN3_D8L % 2 5 3 !
65: CONST CA5SN3_D8L : CA : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_

## CA7SN6 (Ca–Sn)

- Id: `phase:ca-sn:ca7sn6`; status `assigned`
- Structure: Ca7Sn6 · oP52 · Pnma (62); type `st:ca7sn6-op52`; 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: Ca 0.5385, Sn 0.4615
- Stability: stable in 2 of 2 calculated diagram(s): 300–1274.51 K, x(Sn) 0.46154–0.46154
- Literature: 7 values (7 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:ca7sn6)

Names (5): _corpus: _corpus:phase:ca-sn:ca7sn6  
_paper: _paper:10.1016/j.actamat.2006.06.017:Ca7Sn6, paper:10.1016/j.intermet.2007.10.010:Ca7Sn6  
_tdb: _tdb:CaSn-05Car.tdb:CA7SN6, tdb:CaSn-06Ohn.tdb:CA7SN6  


### TDB models of CA7SN6 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): CA7SN6, type code %, sha256 `b3f8ddc2d6b985ad…`

~~~~text
75: PHASE CA7SN6 % 2 7 6 !
76: CONST CA7SN6 : CA : SN : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): CA7SN6, type code %, sha256 `e68b6471da20d657…`

~~~~text
79: PHASE CA7SN6 % 2 7 6 !
80: CONST CA7SN6 : CA : SN : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_
- [doi:10.1016/j.intermet.2007.10.010](https://doi.org/10.1016/j.intermet.2007.10.010) A. Kozlov, M. Ohno, R. Arroyave, Z.K. Liu, R. Schmid-Fetzer, Phase equilibria, thermodynamics and solidification microstructures of Mg–Sn–Ca alloys, Part 1: Experimental investigation and thermodynamic modeling of the ternary Mg–Sn–Ca system, Intermetallics 16, 299-315 (2008).  
_reports values for this phase_

## CASN_B33 (Ca–Sn)

- Id: `phase:ca-sn:casn-b33`; status `assigned`
- Structure: CrB · B33 · oC8 · Cmcm (63); type `st:b33-crb-oc8`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaaaadqg and oqmd-20943, space group 63
- Stoichiometry: Ca 0.5000, Sn 0.5000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1282.46 K, x(Sn) 0.5–0.5
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:casn-b33)

Names (6): _corpus: _corpus:phase:ca-sn:casn-b33  
_mp: _mp:mp-aaaaadqg  
_oqmd: _oqmd:oqmd-20943  
_paper: _paper:10.1016/j.actamat.2006.06.017:CaSn  
_tdb: _tdb:CaSn-05Car.tdb:CASN_B33, tdb:CaSn-06Ohn.tdb:CASN_B33  


### TDB models of CASN_B33 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): CASN_B33, type code %, sha256 `b3f8ddc2d6b985ad…`

~~~~text
80: PHASE CASN_B33 % 2 1 1 !
81: CONST CASN_B33 : CA : SN : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): CASN_B33, type code %, sha256 `e68b6471da20d657…`

~~~~text
84: PHASE CASN_B33 % 2 1 1 !
85: CONST CASN_B33 : CA : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_

## CASN3_L12 (Ca–Sn)

- Id: `phase:ca-sn:casn3-l12`; status `assigned`
- Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type `st:l1-2-aucu3-cp4`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaaaaqsg and oqmd-11003, space group 221
- Stoichiometry: Ca 0.2500, Sn 0.7500
- Stability: stable in 2 of 2 calculated diagram(s): 300–904.29 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:ca-sn:casn3-l12)

Names (6): _corpus: _corpus:phase:ca-sn:casn3-l12  
_mp: _mp:mp-aaaaaqsg  
_oqmd: _oqmd:oqmd-11003  
_paper: _paper:10.1016/j.actamat.2006.06.017:CaSn3  
_tdb: _tdb:CaSn-05Car.tdb:CASN3_L12, tdb:CaSn-06Ohn.tdb:CASN3_L12  


### TDB models of CASN3_L12 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): CASN3_L12, type code %, sha256 `b3f8ddc2d6b985ad…`

~~~~text
85: PHASE CASN3_L12 % 2 1 3 !
86: CONST CASN3_L12 : CA : SN : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): CASN3_L12, type code %, sha256 `e68b6471da20d657…`

~~~~text
89: PHASE CASN3_L12 % 2 1 3 !
90: CONST CASN3_L12 : CA : SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_

## FCC_A1 (Ca–Sn)

- Id: `phase:ca-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: stable in 2 of 2 calculated diagram(s): 300–716.03 K, x(Sn) 0–0
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:fcc-a1)

Names (3): _corpus: _corpus:phase:ca-sn:fcc-a1  
_tdb: _tdb:CaSn-05Car.tdb:FCC_A1, tdb:CaSn-06Ohn.tdb:FCC_A1  


### TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): FCC_A1, type code %A, sha256 `b3f8ddc2d6b985ad…`

~~~~text
30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : CA% SN : VA : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): FCC_A1, type code %A, sha256 `e68b6471da20d657…`

~~~~text
34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : CA% SN : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_

## HCP_A3 (Ca–Sn)

- Id: `phase:ca-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: not stable in 2 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:hcp-a3)

Names (3): _corpus: _corpus:phase:ca-sn:hcp-a3  
_tdb: _tdb:CaSn-05Car.tdb:HCP_A3, tdb:CaSn-06Ohn.tdb:HCP_A3  


### TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): HCP_A3, type code %A, sha256 `b3f8ddc2d6b985ad…`

~~~~text
40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : CA SN : VA : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): HCP_A3, type code %A, sha256 `e68b6471da20d657…`

~~~~text
44: PHASE HCP_A3 %A 2 1 0.5 !
45: CONST HCP_A3 : CA SN : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_assessment that models this phase_

## LIQUID (Ca–Sn)

- Id: `phase:ca-sn:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 499.29–2500 K, x(Sn) 0–1
- Literature: 1 values (1 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ca-sn:liquid)

Names (4): _corpus: _corpus:phase:ca-sn:liquid  
_paper: _paper:10.1016/j.actamat.2006.06.017:liquid  
_tdb: _tdb:CaSn-05Car.tdb:LIQUID, tdb:CaSn-06Ohn.tdb:LIQUID  


### TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written

[CaSn-05Car.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-05Car.tdb): LIQUID, type code %, sha256 `b3f8ddc2d6b985ad…`

~~~~text
25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : CA CA2SN SN : !
~~~~

[CaSn-06Ohn.tdb](https://orchid-project.org/data/databases/sgte-binary/CaSn-06Ohn.tdb): LIQUID, type code %, sha256 `e68b6471da20d657…`

~~~~text
29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : CA CA2SN SN : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2006.06.017](https://doi.org/10.1016/j.actamat.2006.06.017) M OHNO, A KOZLOV, R ARROYAVE, Z LIU, R SCHMIDFETZER, Thermodynamic modeling of the Ca–Sn system based on finite temperature quantities from first-principles and experiment, Acta Materialia 54, 4939-4951 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.101180](https://doi.org/10.3139/146.101180) Y. Cartigny, J.M. Fiorani, A. Maitre, M. Vilasi, Z. Metallkd., 96, 1308-13(2005).  
_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). 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).