# Co–Sm system

> Co–Sm system: 83 accepted literature values (invariant reaction 62, phase transition 20, mixing / partial 1) and 2 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/CO-SM.html · Markdown: https://data.orchid-project.org/systems/CO-SM.md

83 accepted literature values from 2 paper(s) (experimental 54, model 29); 2 calculated phase diagram(s). 1 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: [JSON](https://data.orchid-project.org/literature/systems/CO-SM.json) · [CSV](https://data.orchid-project.org/systems/CO-SM.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CO-SM) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#CO-SM/CoSm-11Yua.json) · [phases (14)](https://data.orchid-project.org/phases/pages/CO-SM.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CO-SM.html) · [Markdown](https://data.orchid-project.org/systems/CO-SM.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 54 |
| model | 29 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 62 |
| phase transition | 20 |
| mixing / partial | 1 |

## Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| CoSm-11Yua.tdb | Y. Yuan, J. Yi, G. Borzone, A. Watson, Calphad, 35, 416-20(2011). [doi:10.1016/j.calphad.2011.06.001](https://doi.org/10.1016/j.calphad.2011.06.001) | `2d48fb36760f4615ddf5f97abfdbee0e6921b431c0b446c571920998b228eb67` | [viewer](https://orchid-project.org/phase-diagrams/#CO-SM/CoSm-11Yua.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoSm-11Yua.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoSm-11Yua.json) |
| CoSm-98Su.tdb | X. Su, W. Zhang, G. Liu, Z. Du, J. Alloys Compd., 267, 149-53(1998). [doi:10.1016/S0925-8388(97)00540-9](https://doi.org/10.1016/S0925-8388%2897%2900540-9) | `f5878d03ef199ecd236e91fd2bd4105a163508ecbf8b65cff7c980b4ae3e16ac` | [viewer](https://orchid-project.org/phase-diagrams/#CO-SM/CoSm-98Su.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoSm-98Su.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoSm-98Su.json) |

Table: Calculated three-phase invariants (model, mole fraction of the second component)

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| CoSm-11Yua.tdb | 1599.76 | FCC_A1 (x(Sm) 0.00326) + LIQUID (x(Sm) 0.08109) + CO17SM2 (x(Sm) 0.11232) |
| CoSm-11Yua.tdb | 1593.2 | CO17SM2 (x(Sm) 0.1188) + CO5SM (x(Sm) 0.14742) + LIQUID (x(Sm) 0.16075) |
| CoSm-11Yua.tdb | 1541.69 | CO5SM (x(Sm) 0.17864) + CO19SM5 (x(Sm) 0.20833) + LIQUID (x(Sm) 0.23746) |
| CoSm-11Yua.tdb | 1517.44 | CO19SM5 (x(Sm) 0.20833) + CO7SM2 (x(Sm) 0.22222) + LIQUID (x(Sm) 0.26976) |
| CoSm-11Yua.tdb | 1517.44 | CO19SM5 (x(Sm) 0.20833) + CO7SM2 (x(Sm) 0.22222) + LIQUID (x(Sm) 0.27002) |
| CoSm-11Yua.tdb | 1477.83 | CO7SM2 (x(Sm) 0.22222) + CO3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.30846) |
| CoSm-11Yua.tdb | 1477.83 | CO7SM2 (x(Sm) 0.22222) + CO3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.30871) |
| CoSm-11Yua.tdb | 1345.64 | CO3SM (x(Sm) 0.25) + CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.4004) |
| CoSm-11Yua.tdb | 1345.64 | CO3SM (x(Sm) 0.25) + CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.40033) |
| CoSm-11Yua.tdb | 1345.64 | CO3SM (x(Sm) 0.25) + CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.40045) |
| CoSm-11Yua.tdb | 1087.07 | CO17SM2 (x(Sm) 0.10753) + CO5SM (x(Sm) 0.16288) + CO19SM5 (x(Sm) 0.20833) |
| CoSm-11Yua.tdb | 954.01 | COSM3_D011 (x(Sm) 0.75) + LIQUID (x(Sm) 0.80298) + BCC_A2 (x(Sm) 0.92838) |
| CoSm-11Yua.tdb | 954.01 | COSM3_D011 (x(Sm) 0.75) + LIQUID (x(Sm) 0.80303) + BCC_A2 (x(Sm) 0.9284) |
| CoSm-11Yua.tdb | 946.22 | COSM3_D011 (x(Sm) 0.75) + BCC_A2 (x(Sm) 0.93042) + HCP_A3 (x(Sm) 0.99374) |
| CoSm-11Yua.tdb | 946.22 | COSM3_D011 (x(Sm) 0.75) + BCC_A2 (x(Sm) 0.93048) + HCP_A3 (x(Sm) 0.99375) |
| CoSm-11Yua.tdb | 882.86 | LIQUID (x(Sm) 0.62803) + CO2SM5 (x(Sm) 0.71429) + COSM3_D011 (x(Sm) 0.75) |
| CoSm-11Yua.tdb | 882.86 | LIQUID (x(Sm) 0.62818) + CO2SM5 (x(Sm) 0.71429) + COSM3_D011 (x(Sm) 0.75) |
| CoSm-11Yua.tdb | 878.85 | COSM3_D011 (x(Sm) 0.75) + HCP_A3 (x(Sm) 0.9958) + RHOMB_C19 (x(Sm) 0.99702) |
| CoSm-11Yua.tdb | 878.85 | COSM3_D011 (x(Sm) 0.75) + HCP_A3 (x(Sm) 0.99581) + RHOMB_C19 (x(Sm) 0.99702) |
| CoSm-11Yua.tdb | 872.48 | CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.61846) + CO2SM5 (x(Sm) 0.71429) |
| CoSm-11Yua.tdb | 872.48 | CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.61833) + CO2SM5 (x(Sm) 0.71429) |
| CoSm-11Yua.tdb | 872.48 | CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.61848) + CO2SM5 (x(Sm) 0.71429) |
| CoSm-11Yua.tdb | 790.45 | CO17SM2 (x(Sm) 0.1053) + CO19SM5 (x(Sm) 0.20833) + CO7SM2 (x(Sm) 0.22222) |
| CoSm-11Yua.tdb | 768.35 | CO17SM2 (x(Sm) 0.10529) + CO19SM5 (x(Sm) 0.20833) + CO7SM2 (x(Sm) 0.22222) |
| CoSm-11Yua.tdb | 694.99 | HCP_A3 (x(Sm) 0) + FCC_A1 (x(Sm) 0) + CO17SM2 (x(Sm) 0.10526) |
| CoSm-98Su.tdb | 1612.38 | FCC_A1 (x(Sm) 0.00132) + LIQUID (x(Sm) 0.07906) + CO17SM2 (x(Sm) 0.10526) |
| CoSm-98Su.tdb | 1612.38 | FCC_A1 (x(Sm) 0.00132) + LIQUID (x(Sm) 0.07893) + CO17SM2 (x(Sm) 0.10526) |
| CoSm-98Su.tdb | 1589.43 | CO17SM2 (x(Sm) 0.10526) + CO5SM (x(Sm) 0.16667) + LIQUID (x(Sm) 0.16999) |
| CoSm-98Su.tdb | 1589.43 | CO17SM2 (x(Sm) 0.10526) + CO5SM (x(Sm) 0.16667) + LIQUID (x(Sm) 0.16971) |
| CoSm-98Su.tdb | 1542.98 | CO5SM (x(Sm) 0.16667) + CO19SM5 (x(Sm) 0.20833) + LIQUID (x(Sm) 0.25485) |
| CoSm-98Su.tdb | 1542.97 | CO5SM (x(Sm) 0.16667) + CO19SM5 (x(Sm) 0.20833) + LIQUID (x(Sm) 0.25531) |
| CoSm-98Su.tdb | 1542.97 | CO5SM (x(Sm) 0.16667) + CO19SM5 (x(Sm) 0.20833) + LIQUID (x(Sm) 0.25537) |
| CoSm-98Su.tdb | 1514.09 | CO19SM5 (x(Sm) 0.20833) + CO7SM2 (x(Sm) 0.22222) + LIQUID (x(Sm) 0.2971) |
| CoSm-98Su.tdb | 1514.09 | CO19SM5 (x(Sm) 0.20833) + CO7SM2 (x(Sm) 0.22222) + LIQUID (x(Sm) 0.29691) |
| CoSm-98Su.tdb | 1514.09 | CO19SM5 (x(Sm) 0.20833) + CO7SM2 (x(Sm) 0.22222) + LIQUID (x(Sm) 0.29732) |
| CoSm-98Su.tdb | 1473.06 | CO7SM2 (x(Sm) 0.22222) + CO3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.34318) |
| CoSm-98Su.tdb | 1473.06 | CO7SM2 (x(Sm) 0.22222) + CO3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.34296) |
| CoSm-98Su.tdb | 1473.06 | CO7SM2 (x(Sm) 0.22222) + CO3SM (x(Sm) 0.25) + LIQUID (x(Sm) 0.3433) |
| CoSm-98Su.tdb | 1343.69 | CO3SM (x(Sm) 0.25) + CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.44703) |
| CoSm-98Su.tdb | 1343.69 | CO3SM (x(Sm) 0.25) + CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.44682) |
| CoSm-98Su.tdb | 1343.69 | CO3SM (x(Sm) 0.25) + CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.44714) |
| CoSm-98Su.tdb | 1195 | LIQUID (x(Sm) 0.91822) + BCC_A2 (x(Sm) 1) + HCP_A3 (x(Sm) 1) |
| CoSm-98Su.tdb | 1195 | LIQUID (x(Sm) 0.91844) + HCP_A3 (x(Sm) 1) + BCC_A2 (x(Sm) 1) |
| CoSm-98Su.tdb | 1085.25 | CO17SM2 (x(Sm) 0.10526) + CO5SM (x(Sm) 0.16667) + CO19SM5 (x(Sm) 0.20833) |
| CoSm-98Su.tdb | 1006.99 | LIQUID (x(Sm) 0.83486) + HCP_A3 (x(Sm) 1) + RHOMB_C19 (x(Sm) 1) |
| CoSm-98Su.tdb | 1006.99 | LIQUID (x(Sm) 0.83499) + RHOMB_C19 (x(Sm) 1) + HCP_A3 (x(Sm) 1) |
| CoSm-98Su.tdb | 938.74 | COSM3_D011 (x(Sm) 0.75) + LIQUID (x(Sm) 0.81734) + RHOMB_C19 (x(Sm) 1) |
| CoSm-98Su.tdb | 938.74 | COSM3_D011 (x(Sm) 0.75) + LIQUID (x(Sm) 0.81737) + RHOMB_C19 (x(Sm) 1) |
| CoSm-98Su.tdb | 938.74 | COSM3_D011 (x(Sm) 0.75) + LIQUID (x(Sm) 0.81729) + RHOMB_C19 (x(Sm) 1) |
| CoSm-98Su.tdb | 884.47 | LIQUID (x(Sm) 0.64503) + CO4SM9 (x(Sm) 0.69231) + COSM3_D011 (x(Sm) 0.75) |
| CoSm-98Su.tdb | 884.47 | LIQUID (x(Sm) 0.64524) + CO4SM9 (x(Sm) 0.69231) + COSM3_D011 (x(Sm) 0.75) |
| CoSm-98Su.tdb | 865.4 | CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.62945) + CO4SM9 (x(Sm) 0.69231) |
| CoSm-98Su.tdb | 865.4 | CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.62932) + CO4SM9 (x(Sm) 0.69231) |
| CoSm-98Su.tdb | 865.4 | CO2SM_C15 (x(Sm) 0.33333) + LIQUID (x(Sm) 0.62948) + CO4SM9 (x(Sm) 0.69231) |
| CoSm-98Su.tdb | 694.99 | FCC_A1 (x(Sm) 0) + HCP_A3 (x(Sm) 0) + CO17SM2 (x(Sm) 0.10526) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/CO/CO-SM.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/CO/CO-SM.json) · [CALPHAD hull CoSm-98Su](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-SM--CoSm-98Su.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Co–Sm system (62)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1612 | eutectic: Liq.->α-Co(fcc)+Co17Sm2 | L: Sm 0.079; Co17Sm2: Sm 0.105263 | model | [1] Su 1998 | Table 3, p. 4, row 32; `ORC-J3GK64YP7M` |  |
| 1600 | eutectic: Liq.->α-Co(fcc)+Co17Sm2 | L: Sm 0.092; Co17Sm2: Sm 0.105263 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 33; `ORC-5ZVSQLEWIP` |  |
| 1600 | eutectic: Liq -> α(Co) + Sm2Co17 | Sm2Co17: Sm 0.105263 | model | [2] Yuan 2011 | Table 2, p. 3, row 36; `ORC-DUCD54PC5N` |  |
| 1600 | eutectic: Liq -> α(Co) + Sm2Co17 | Sm2Co17: Sm 0.105263 | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 37; `ORC-LKMELK7LZK` |  |
| 1598 | eutectic: Liq.->α-Co(fcc)+Co17Sm2 | Co17Sm2: Sm 0.105263 | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 34; `ORC-MZ7TEMZHWT` |  |
| 1598 | eutectic: Liq -> α(Co) + Sm2Co17 | Sm2Co17: Sm 0.105263 | experimental | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 2, p. 3, row 38; `ORC-X2YA4XD4ZE` |  |
| 1595 | Liq.+Co17Sm2->Co5Sm | L: Sm 0.192; Co17Sm2: Sm 0.105263; Co5Sm: Sm 0.166667 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 25; `ORC-A4F3NFKHZI` |  |
| 1595 | Liq + Sm2Co17 -> SmCo5 | Sm2Co17: Sm 0.105263; SmCo5: Sm 0.166667 | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 31; `ORC-VQUWVV3WDM` |  |
| 1593 | Liq + Sm2Co17 -> SmCo5 | Sm2Co17: Sm 0.105263; SmCo5: Sm 0.166667 | model | [2] Yuan 2011 | Table 2, p. 3, row 30; `ORC-3QZYKNSLNE` |  |
| 1593 | Liq + Sm2Co17 -> SmCo5 | Sm2Co17: Sm 0.105263; SmCo5: Sm 0.166667 | experimental | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 2, p. 3, row 32; `ORC-NTIRGRWO7O` |  |
| 1593 | Liq.+Co17Sm2->Co5Sm | Co17Sm2: Sm 0.105263; Co5Sm: Sm 0.166667 | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 26; `ORC-W5JW5TDOID` |  |
| 1589 | Liq.+Co17Sm2->Co5Sm | L: Sm 0.17; Co17Sm2: Sm 0.105263; Co5Sm: Sm 0.166667 | model | [1] Su 1998 | Table 3, p. 4, row 24; `ORC-QIJIMUS7Q4` |  |
| 1543 | Liq.+Co5Sm->Co19Sm5 | L: Sm 0.258; Co5Sm: Sm 0.166667; Co19Sm5: Sm 0.208333 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 23; `ORC-7LTBDQO2Y4` |  |
| 1543 | Liq.+Co5Sm->Co19Sm5 | L: Sm 0.255; Co5Sm: Sm 0.166667; Co19Sm5: Sm 0.208333 | model | [1] Su 1998 | Table 3, p. 4, row 22; `ORC-SSYGWYCUYE` |  |
| 1543 | Liq + SmCo5 -> Sm5Co19 | SmCo5: Sm 0.166667; Sm5Co19: Sm 0.208333 | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 29; `ORC-YWY3O2ZPW2` |  |
| 1541 | Liq + SmCo5 -> Sm5Co19 | SmCo5: Sm 0.166667; Sm5Co19: Sm 0.208333 | model | [2] Yuan 2011 | Table 2, p. 3, row 28; `ORC-RDWOYEP3EH` |  |
| 1517 | Liq + Sm5Co19 -> Sm2Co7 | Sm5Co19: Sm 0.208333; Sm2Co7: Sm 0.222222 | model | [2] Yuan 2011 | Table 2, p. 3, row 25; `ORC-DODJNLCMOB` |  |
| 1514 | Liq.+Co19Sm5->Co7Sm2 | L: Sm 0.297; Co19Sm5: Sm 0.208333; Co7Sm2: Sm 0.222222 | model | [1] Su 1998 | Table 3, p. 4, row 19; `ORC-2LTTG53MA3` |  |
| 1514 | Liq.+Co19Sm5->Co7Sm2 | L: Sm 0.285; Co19Sm5: Sm 0.208333; Co7Sm2: Sm 0.222222 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 20; `ORC-EOIVI7ZE5D` |  |
| 1514 | Liq + Sm5Co19 -> Sm2Co7 | Sm5Co19: Sm 0.208333; Sm2Co7: Sm 0.222222 | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 26; `ORC-O5TAPMJNA4` |  |
| 1513 | Liq + Sm5Co19 -> Sm2Co7 | Sm5Co19: Sm 0.208333; Sm2Co7: Sm 0.222222 | experimental | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 2, p. 3, row 27; `ORC-5ZWWQGTBO4` |  |
| 1513 | Liq.+Co19Sm5->Co7Sm2 | Co19Sm5: Sm 0.208333; Co7Sm2: Sm 0.222222 | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 21; `ORC-Y5S7FDTHRF` |  |
| 1477 | Liq + Sm2Co7 -> SmCo3 | Sm2Co7: Sm 0.222222; SmCo3: Sm 0.25 | model | [2] Yuan 2011 | Table 2, p. 3, row 22; `ORC-C6LA2QV4OH` |  |
| 1473 | Liq.+Co7Sm2->Co3Sm | Co7Sm2: Sm 0.222222; Co3Sm: Sm 0.25 | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 18; `ORC-AJD4CF3AM7` |  |
| 1473 | Liq + Sm2Co7 -> SmCo3 | Sm2Co7: Sm 0.222222; SmCo3: Sm 0.25 | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 23; `ORC-CIJZSWAN6Z` |  |
| 1473 | Liq + Sm2Co7 -> SmCo3 | Sm2Co7: Sm 0.222222; SmCo3: Sm 0.25 | experimental | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 2, p. 3, row 24; `ORC-GBPMHEV3PI` |  |
| 1473 | Liq.+Co7Sm2->Co3Sm | L: Sm 0.34; Co7Sm2: Sm 0.222222; Co3Sm: Sm 0.25 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 17; `ORC-IPSNQ57ZLW` |  |
| 1473 | Liq.+Co7Sm2->Co3Sm | L: Sm 0.343; Co7Sm2: Sm 0.222222; Co3Sm: Sm 0.25 | model | [1] Su 1998 | Table 3, p. 4, row 16; `ORC-LHHTAWPQ5A` |  |
| 1348 | Liq.+Co3Sm->Co2Sm | Co3Sm: Sm 0.25; Co2Sm: Sm 0.333333 | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 15; `ORC-DG4VXA5DTV` |  |
| 1348 | Liq + SmCo3 -> SmCo2 | SmCo3: Sm 0.25; SmCo2: Sm 0.333333 | experimental | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 2, p. 3, row 21; `ORC-MQNGBPUKMR` |  |
| 1345 | Liq + SmCo3 -> SmCo2 | SmCo3: Sm 0.25; SmCo2: Sm 0.333333 | model | [2] Yuan 2011 | Table 2, p. 3, row 19; `ORC-FALSOCSCSZ` |  |
| 1344 | Liq.+Co3Sm->Co2Sm | L: Sm 0.447; Co3Sm: Sm 0.25; Co2Sm: Sm 0.333333 | model | [1] Su 1998 | Table 3, p. 4, row 13; `ORC-Z5VYXUX7MH` |  |
| 1343 | Liq.+Co3Sm->Co2Sm | L: Sm 0.412; Co3Sm: Sm 0.25; Co2Sm: Sm 0.333333 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 14; `ORC-5KNNWYIAAH` |  |
| 1343 | Liq + SmCo3 -> SmCo2 | SmCo3: Sm 0.25; SmCo2: Sm 0.333333 | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 20; `ORC-RTCFF4MP77` |  |
| 1087 | SmCo5 -> Sm5Co19 + Sm2Co17 | SmCo5: Sm 0.166667; Sm5Co19: Sm 0.208333; Sm2Co17: Sm 0.105263 | model | [2] Yuan 2011 | Table 2, p. 3, row 39; `ORC-OUKZYI24PY` |  |
| 1085 | Co5Sm->Co19Sm5+Co17Sm2 | Co5Sm: Sm 0.166667; Co19Sm5: Sm 0.208333; Co17Sm2: Sm 0.105263 | model | [1] Su 1998 | Table 3, p. 4, row 30; `ORC-DP4QIHF4GN` |  |
| 1083 | SmCo5 -> Sm5Co19 + Sm2Co17 | SmCo5: Sm 0.166667; Sm5Co19: Sm 0.208333; Sm2Co17: Sm 0.105263 | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 40; `ORC-S52TJA6SZO` |  |
| 1083 | Co5Sm->Co19Sm5+Co17Sm2 | Co5Sm: Sm 0.166667; Co19Sm5: Sm 0.208333; Co17Sm2: Sm 0.105263 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 31; `ORC-SRNQVIDO2L` |  |
| 1023 | eutectoid: SmCo5 -> Sm2 Co7 + Sm2 Co17 |  | model | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | p. 1; `ORC-KK55OVEQ55` | “SmCo5 undergoes eutectoidal decomposition into Sm2 Co7 and Sm2 Co17 at about 1023 K.” |
| 958 | eutectic: Liq -> γ(Sm) + Sm3Co | Sm3Co: Sm 0.75 | experimental | [2] Yuan 2011; _cites Yuan 2010_ [doi](https://doi.org/10.1016/j.jallcom.2010.08.035) | Table 2, p. 3, row 2; `ORC-OIO3RQGNEU` |  |
| 954 | eutectic: Liq -> γ(Sm) + Sm3Co | Sm3Co: Sm 0.75 | model | [2] Yuan 2011 | Table 2, p. 3, row 1; `ORC-NEJ6YFL4YV` |  |
| 948 | γ(Sm) -> β(Sm) + Sm3Co | Sm3Co: Sm 0.75 | experimental | [2] Yuan 2011; _cites Yuan 2010_ [doi](https://doi.org/10.1016/j.jallcom.2010.08.035) | Table 2, p. 3, row 4; `ORC-LUOGVVUJAC` |  |
| 946 | γ(Sm) -> β(Sm) + Sm3Co | Sm3Co: Sm 0.75 | model | [2] Yuan 2011 | Table 2, p. 3, row 3; `ORC-MKLKZST3NS` |  |
| 943 | eutectic: Liq.->α-Sm(r hom)+CoSm3 | L: Sm 0.83; α-Sm(r hom): Sm 1; CoSm3: Sm 0.75 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 2; `ORC-JISCPG6W7J` |  |
| 938.8 | eutectic: Liq.->α-Sm(r hom)+CoSm3 | L: Sm 0.817; α-Sm(r hom): Sm 1; CoSm3: Sm 0.75 | model | [1] Su 1998 | Table 3, p. 4, row 1; `ORC-2QVWM5RCLP` |  |
| 886 | Liq + Sm3Co -> Sm5Co2 | Sm3Co: Sm 0.75; Sm5Co2: Sm 0.714286 | experimental | [2] Yuan 2011; _cites Yuan 2010_ [doi](https://doi.org/10.1016/j.jallcom.2010.08.035) | Table 2, p. 3, row 12; `ORC-E6YE5QZV3B` |  |
| 886 | Liq + Sm3Co -> Sm5Co2 | Sm3Co: Sm 0.75; Sm5Co2: Sm 0.714286 | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 13; `ORC-MOYD2VXDYF` |  |
| 886 | Liq.+CoSm3->Co4Sm9 | L: Sm 0.644; CoSm3: Sm 0.75; Co4Sm9: Sm 0.692308 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 8; `ORC-UPVZAREZTT` |  |
| 884.4 | Liq.+CoSm3->Co4Sm9 | L: Sm 0.645; CoSm3: Sm 0.75; Co4Sm9: Sm 0.692308 | model | [1] Su 1998 | Table 3, p. 4, row 7; `ORC-JKGM6A3SXB` |  |
| 883 | Liq + Sm3Co -> Sm5Co2 | Sm3Co: Sm 0.75; Sm5Co2: Sm 0.714286 | model | [2] Yuan 2011 | Table 2, p. 3, row 11; `ORC-ERNAZ3CLQH` |  |
| 883 | β(Sm) -> α(Sm) + Sm3Co | Sm3Co: Sm 0.75 | experimental | [2] Yuan 2011; _cites Yuan 2010_ [doi](https://doi.org/10.1016/j.jallcom.2010.08.035) | Table 2, p. 3, row 6; `ORC-X3QOTV2GPH` |  |
| 879 | β(Sm) -> α(Sm) + Sm3Co | Sm3Co: Sm 0.75 | model | [2] Yuan 2011 | Table 2, p. 3, row 5; `ORC-YRMJL63YB3` |  |
| 878 | Liq.+CoSm3->Co4Sm9 | CoSm3: Sm 0.75; Co4Sm9: Sm 0.692308 | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 9; `ORC-HQKHI23C3H` |  |
| 878 | Liq + Sm3Co -> Sm5Co2 | Sm3Co: Sm 0.75; Sm5Co2: Sm 0.714286 | experimental | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 2, p. 3, row 14; `ORC-RDDYLEOQSY` |  |
| 872 | eutectic: Liq -> Sm5Co2 + SmCo2 | Sm5Co2: Sm 0.714286; SmCo2: Sm 0.333333 | model | [2] Yuan 2011 | Table 2, p. 3, row 15; `ORC-HVJDQUFBFN` |  |
| 868 | eutectic: Liq.->α-Sm(r hom)+CoSm3 | α-Sm(r hom): Sm 1; CoSm3: Sm 0.75 | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 3; `ORC-I2TGEIBJLD` |  |
| 865.4 | eutectic: Liq.->Co4Sm9+Co2Sm | L: Sm 0.63; Co4Sm9: Sm 0.692308; Co2Sm: Sm 0.333333 | model | [1] Su 1998 | Table 3, p. 4, row 10; `ORC-IRMF3X4A3A` |  |
| 863 | eutectic: Liq.->Co4Sm9+Co2Sm | L: Sm 0.63; Co4Sm9: Sm 0.692308; Co2Sm: Sm 0.333333 | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 11; `ORC-2LK6YY2A6C` |  |
| 863 | eutectic: Liq -> Sm5Co2 + SmCo2 | Sm5Co2: Sm 0.714286; SmCo2: Sm 0.333333 | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 17; `ORC-QWLD7INTKO` |  |
| 856 | eutectic: Liq -> Sm5Co2 + SmCo2 | Sm5Co2: Sm 0.714286; SmCo2: Sm 0.333333 | experimental | [2] Yuan 2011; _cites Yuan 2010_ [doi](https://doi.org/10.1016/j.jallcom.2010.08.035) | Table 2, p. 3, row 16; `ORC-IAFIQDUB53` |  |
| 848 | eutectic: Liq.->Co4Sm9+Co2Sm | Co4Sm9: Sm 0.692308; Co2Sm: Sm 0.333333 | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 12; `ORC-OZMZWBGZD6` |  |
| 848 | eutectic: Liq -> Sm5Co2 + SmCo2 | Sm5Co2: Sm 0.714286; SmCo2: Sm 0.333333 | experimental | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 2, p. 3, row 18; `ORC-U52UBSELLD` |  |

## Other properties

### Phase transition (20)

Table: Phase transition, Co–Sm system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 226.7 K | 226.7 | magnetic: Co2Sm; _alloy: Sm 0.333333_ | experimental | [1] Su 1998; _cites Buschow 1977_ [doi](https://doi.org/10.1088/0034-4885/40/10/002) | Table 2, p. 3, row 1; `ORC-AUEQEBL2HS` |  |
| Phase transition | 590 K | 590 | magnetic: Co3Sm; _alloy: Sm 0.25_ | experimental | [1] Su 1998 | Table 2, p. 3, row 2; `ORC-BINDVS42WC` |  |
| Phase transition | 713 K | 713 | magnetic: Co7Sm2; _alloy: Sm 0.222222_ | experimental | [1] Su 1998; _cites Buschow 1977_ [doi](https://doi.org/10.1088/0034-4885/40/10/002) | Table 2, p. 3, row 3; `ORC-F3PAKDDXEI` |  |
| Phase transition | 830 K | 830 | magnetic: Co19Sm5; _alloy: Sm 0.208333_ | experimental | [1] Su 1998 | Table 2, p. 3, row 4; `ORC-HIQCW5KVXA` |  |
| Phase transition | 968 K | 968 | Liq -> Sm3Co; _L: Sm 0.75; Sm3Co: Sm 0.75_ | experimental | [2] Yuan 2011; _cites Yuan 2010_ [doi](https://doi.org/10.1016/j.jallcom.2010.08.035) | Table 2, p. 3, row 8; `ORC-2YDLKA3WB3` |  |
| Phase transition | 968 K | 968 | Liq -> Sm3Co; _L: Sm 0.75; Sm3Co: Sm 0.75_ | experimental | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 2, p. 3, row 10; `ORC-CIKNDHXPYU` |  |
| Phase transition | 968 K | 968 | Liq.->CoSm3; _L: Sm 0.75; CoSm3: Sm 0.75_ | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 6; `ORC-7TFRF635BU` |  |
| Phase transition | 970 K | 970 | Liq -> Sm3Co; _L: Sm 0.75; Sm3Co: Sm 0.75_ | model | [2] Yuan 2011 | Table 2, p. 3, row 7; `ORC-XTCP7XHMDO` |  |
| Phase transition | 973 K | 973 | Liq -> Sm3Co; _L: Sm 0.75; Sm3Co: Sm 0.75_ | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 9; `ORC-O7IIZI2XU3` |  |
| Phase transition | 973 K | 973 | Liq.->CoSm3; _L: Sm 0.75; CoSm3: Sm 0.75_ | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 5; `ORC-CQXB2JD66H` |  |
| Phase transition | 977.5 K | 977.5 | Liq.->CoSm3; _L: Sm 0.75; CoSm3: Sm 0.75_ | model | [1] Su 1998 | Table 3, p. 4, row 4; `ORC-ZRDTHX3ZAQ` |  |
| Phase transition | 1020 K | 1020 | magnetic: Co5Sm; _alloy: Sm 0.166667_ | experimental | [1] Su 1998; _cites Buschow 1977_ [doi](https://doi.org/10.1088/0034-4885/40/10/002) | Table 2, p. 3, row 5; `ORC-Y77I5XXN25` |  |
| Phase transition | 1083 K | 1083 | SmCo5 | model | [2] Yuan 2011; _cites Ge 1993_ | p. 1; `ORC-VT6H2FUE7K` | “Ge et al. \[12\] reported the decomposition of SmCo5 taking place at 1083 K and found a small solubility of Sm in fcc-Co.” |
| Phase transition | 1195 K | 1195 | magnetic: Co17Sm2; _alloy: Sm 0.105263_ | experimental | [1] Su 1998; _cites Buschow 1977_ [doi](https://doi.org/10.1088/0034-4885/40/10/002) | Table 2, p. 3, row 6; `ORC-DE6AQSKAUZ` |  |
| Phase transition | 1608 K | 1608 | Liq -> Sm2Co17; _L: Sm 0.105263; Sm2Co17: Sm 0.105263_ | experimental | [2] Yuan 2011; _cites Van 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 2, p. 3, row 35; `ORC-GDNLJSB7DN` |  |
| Phase transition | 1608 K | 1608 | Liq.->Co17Sm2; _L: Sm 0.105263; Co17Sm2: Sm 0.105263_ | experimental | [1] Su 1998; _cites Buschow 1968_ [doi](https://doi.org/10.1016/0022-5088%2868%2990037-4) | Table 3, p. 4, row 29; `ORC-DHQFWA5CR4` |  |
| Phase transition | 1614 K | 1614 | Liq -> Sm2Co17; _L: Sm 0.105263; Sm2Co17: Sm 0.105263_ | model | [2] Yuan 2011 | Table 2, p. 3, row 33; `ORC-2HUZOTGRIU` |  |
| Phase transition | 1619 K | 1619 | Liq.->Co17Sm2; _L: Sm 0.105263; Co17Sm2: Sm 0.105263_ | model | [1] Su 1998 | Table 3, p. 4, row 27; `ORC-GHVGN5WOSR` |  |
| Phase transition | 1620 K | 1620 | Liq -> Sm2Co17; _L: Sm 0.105263; Sm2Co17: Sm 0.105263_ | experimental | [2] Yuan 2011; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 2, p. 3, row 34; `ORC-J5THFHFJKU` |  |
| Phase transition | 1620 K | 1620 | Liq.->Co17Sm2; _L: Sm 0.105263; Co17Sm2: Sm 0.105263_ | experimental | [1] Su 1998; _cites Ge 1993_ [doi](https://doi.org/10.1515/ijmr-1993-840306) | Table 3, p. 4, row 28; `ORC-SPD3LDVXS2` |  |

### Mixing / partial (1)

Table: Mixing / partial, Co–Sm system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Partial enthalpy; _printed: limiting partial enthalpy of mixing_ | -55.5 kJ/mol (basis unstated) | 1400 | liquid | model | [2] Yuan 2011 | p. 3; `ORC-3GOJ54X5BJ.9e4f8e` | “The calculated limiting partial enthalpy of mixing of Co in the Co-Sm liquid at 1400 K is -55.5 kJ/mol, which agrees well with the value of -50.5 ± 3.9 kJ/mol reported by Usenko and Ivanov \[20\].” |

## Sources

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

1. Xuping Su, Weijing Zhang, Guoquan Liu, Zhenmin Du, A thermodynamic assessment of the Co–Sm system, Journal of Alloys and Compounds 267, 149-153 (1998). [doi:10.1016/s0925-8388(97)00540-9](https://doi.org/10.1016/s0925-8388%2897%2900540-9)
2. Yuan Yuan, Jianhong Yi, Gabriella Borzone, Andy Watson, Thermodynamic modeling of the Co–Sm system, Calphad 35, 416-420 (2011). [doi:10.1016/j.calphad.2011.06.001](https://doi.org/10.1016/j.calphad.2011.06.001)

## 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). https://doi.org/10.5281/zenodo.23735569
- R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735859
- R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735891
- 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 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.

```bibtex
@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_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@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 ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).