# Sc–Si phases > Sc–Si system: 10 phases (tier A 6, liquid 1, needs_review 3); 9 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/SC-SI.html · Markdown: https://data.orchid-project.org/phases/pages/SC-SI.md 10 phases (tier A 6, liquid 1, needs_review 3); 9 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=SC-SI) · [full JSON](https://data.orchid-project.org/phases/systems/SC-SI.json) · [Sc–Si system page](https://data.orchid-project.org/systems/SC-SI.html) · [Markdown](https://data.orchid-project.org/phases/pages/SC-SI.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Sc–Si system (10) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [DIAMOND_A4](#phase-sc-si-a4-diamond); _phase:sc-si:a4-diamond_ | C (diamond) · A4 · cF8 · Fd-3m (227) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2499.32 K, x(Si) 1–1 | 4 | 2 | | [BCC_A2](#phase-sc-si-bcc-a2); _phase:sc-si:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 1607.95–1832.95 K, x(Si) 0–3e-05 | 0 | 2 | | [FCC_A1](#phase-sc-si-fcc-a1); _phase:sc-si:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 | | [HCP_A3](#phase-sc-si-hcp-a3); _phase:sc-si:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1702.99 K, x(Si) 0–2e-05 | 2 | 2 | | [LIQUID](#phase-sc-si-liquid); _phase:sc-si:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 1424.57–2500 K, x(Si) 0–1 | 10 | 2 | | [SC2SI3_C32](#phase-sc-si-sc2si3-c32); _phase:sc-si:sc2si3-c32_ | | needs_review | stable in 1 of 1 calculated diagram(s): 1196.56–1534.9 K, x(Si) 0.6–0.6 | 0 | 1 | | [BETA_SC3SI5](#phase-sc-si-sc3si5-beta); _phase:sc-si:sc3si5-beta_ | | needs_review | stable in 1 of 1 calculated diagram(s): 1342.73–1536.12 K, x(Si) 0.625–0.625 | 6 | 1 | | [ALPHA_SC3SI5_C32](#phase-sc-si-sc3si5-c32-alpha); _phase:sc-si:sc3si5-c32-alpha_ | | needs_review | stable in 1 of 1 calculated diagram(s): 1198.66–1342.73 K, x(Si) 0.625–0.625 | 6 | 1 | | [SC5SI3_D88](#phase-sc-si-sc5si3-d88); _phase:sc-si:sc5si3-d88_ | Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2333.6 K, x(Si) 0.375–0.375 | 11 | 2 | | [SCSI_B33](#phase-sc-si-scsi-b33); _phase:sc-si:scsi-b33_ | CrB · B33 · oC8 · Cmcm (63) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2056.92 K, x(Si) 0.5–0.5 | 11 | 2 | ## DIAMOND_A4 (Sc–Si) - Id: `phase:sc-si: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: Si 1.0000 - Stability: stable in 2 of 2 calculated diagram(s): 300–2499.32 K, x(Si) 1–1 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:a4-diamond) Names (5): _corpus: _corpus:phase:sc-si:a4-diamond, corpus:phase:sc-si:diamond-a4 _paper: _paper:10.1007/s10973-014-4216-2:(Si) _tdb: _tdb:ScSi-08GTT.tdb:DIAMOND_A4, tdb:ScSi-15Qin.tdb:DIAMOND_A4 ### TDB models of DIAMOND_A4 (2): PHASE and CONSTITUENT statements as written [ScSi-08GTT.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-08GTT.tdb): DIAMOND_A4, type code %, sha256 `39f96fbdf0474901…` ~~~~text 40: PHASE DIAMOND_A4 % 1 1 ! 41: CONST DIAMOND_A4 : SI : ! ~~~~ [ScSi-15Qin.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb): DIAMOND_A4, type code %, sha256 `e29b1390094334c4…` ~~~~text 41: PHASE DIAMOND_A4 % 1 1 ! 42: CONST DIAMOND_A4 : SI : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf00794560](https://doi.org/10.1007/bf00794560) V. N. Eremenko, K. A. Meleshevich, Yu. I. Buyanov, P. S. Martsenyuk, Phase equilibria in the scandium-silicon system, Powder Metall Met Ceram 27, 967-972 (1988). _cited as the source of values for this phase_ ## BCC_A2 (Sc–Si) - Id: `phase:sc-si: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): 1607.95–1832.95 K, x(Si) 0–3e-05 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:bcc-a2) Names (3): _corpus: _corpus:phase:sc-si:bcc-a2 _tdb: _tdb:ScSi-08GTT.tdb:BCC_A2, tdb:ScSi-15Qin.tdb:BCC_A2 ### TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written [ScSi-08GTT.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-08GTT.tdb): BCC_A2, type code %, sha256 `39f96fbdf0474901…` ~~~~text 30: PHASE BCC_A2 % 2 1 3 ! 31: CONST BCC_A2 : SC% SI : VA : ! ~~~~ [ScSi-15Qin.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb): BCC_A2, type code %, sha256 `e29b1390094334c4…` ~~~~text 31: PHASE BCC_A2 % 2 1 3 ! 32: CONST BCC_A2 : SC% SI : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). _assessment that models this phase_ ## FCC_A1 (Sc–Si) - Id: `phase:sc-si: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 2 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:fcc-a1) Names (3): _corpus: _corpus:phase:sc-si:fcc-a1 _tdb: _tdb:ScSi-08GTT.tdb:FCC_A1, tdb:ScSi-15Qin.tdb:FCC_A1 ### TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written [ScSi-08GTT.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-08GTT.tdb): FCC_A1, type code %, sha256 `39f96fbdf0474901…` ~~~~text 25: PHASE FCC_A1 % 2 1 1 ! 26: CONST FCC_A1 : SC SI : VA : ! ~~~~ [ScSi-15Qin.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb): FCC_A1, type code %, sha256 `e29b1390094334c4…` ~~~~text 26: PHASE FCC_A1 % 2 1 1 ! 27: CONST FCC_A1 : SC SI : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). _assessment that models this phase_ ## HCP_A3 (Sc–Si) - Id: `phase:sc-si: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 2 of 2 calculated diagram(s): 300–1702.99 K, x(Si) 0–2e-05 - Literature: 2 values (2 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:hcp-a3) Names (4): _corpus: _corpus:phase:sc-si:hcp-a3 _paper: _paper:10.1007/s10973-014-4216-2:(αSc) _tdb: _tdb:ScSi-08GTT.tdb:HCP_A3, tdb:ScSi-15Qin.tdb:HCP_A3 ### TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written [ScSi-08GTT.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-08GTT.tdb): HCP_A3, type code %, sha256 `39f96fbdf0474901…` ~~~~text 35: PHASE HCP_A3 % 2 1 0.5 ! 36: CONST HCP_A3 : SC% SI : VA : ! ~~~~ [ScSi-15Qin.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb): HCP_A3, type code %, sha256 `e29b1390094334c4…` ~~~~text 36: PHASE HCP_A3 % 2 1 0.5 ! 37: CONST HCP_A3 : SC% SI : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf00794560](https://doi.org/10.1007/bf00794560) V. N. Eremenko, K. A. Meleshevich, Yu. I. Buyanov, P. S. Martsenyuk, Phase equilibria in the scandium-silicon system, Powder Metall Met Ceram 27, 967-972 (1988). _cited as the source of values for this phase_ ## LIQUID (Sc–Si) - Id: `phase:sc-si:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 2 of 2 calculated diagram(s): 1424.57–2500 K, x(Si) 0–1 - Literature: 10 values (10 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:liquid) Names (4): _corpus: _corpus:phase:sc-si:liquid _paper: _paper:10.1007/s10973-014-4216-2:L _tdb: _tdb:ScSi-08GTT.tdb:LIQUID, tdb:ScSi-15Qin.tdb:LIQUID ### TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written [ScSi-08GTT.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-08GTT.tdb): LIQUID, type code %, sha256 `39f96fbdf0474901…` ~~~~text 20: PHASE LIQUID:L % 1 1 ! 21: CONST LIQUID:L : SC SI : ! ~~~~ [ScSi-15Qin.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb): LIQUID, type code %, sha256 `e29b1390094334c4…` ~~~~text 21: PHASE LIQUID:L % 1 1 ! 22: CONST LIQUID:L : SC SI : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf00794560](https://doi.org/10.1007/bf00794560) V. N. Eremenko, K. A. Meleshevich, Yu. I. Buyanov, P. S. Martsenyuk, Phase equilibria in the scandium-silicon system, Powder Metall Met Ceram 27, 967-972 (1988). _cited as the source of values for this phase_ ## SC2SI3_C32 (Sc–Si) - Id: `phase:sc-si:sc2si3-c32`; status `needs_review` - No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_C32; stoichiometry_contradicts_C32:ScSi-08GTT.tdb - Candidate (name_token): AlB2 · C32 · hP3 · P6/mmm (191) — Strukturbericht/word 'C32' in the TDB name - Candidate (sgte_mmc2): AlB2 · C32 · hP3 · P6/mmm (191) — Hallstedt 2025 mmc2 row for SC2SI3_C32: Sc2Si3 - Candidate (tdb_comment): AlB2 · hP3 · P6/mmm — ScSi-08GTT.tdb: 'Prototype AlB2 (hP3, P6/mmm)' - Stoichiometry: Sc 0.4000, Si 0.6000 - Stability: stable in 1 of 1 calculated diagram(s): 1196.56–1534.9 K, x(Si) 0.6–0.6 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:sc2si3-c32) Names (2): _corpus: _corpus:phase:sc-si:sc2si3-c32 _tdb: _tdb:ScSi-08GTT.tdb:SC2SI3_C32 ### TDB models of SC2SI3_C32 (1): PHASE and CONSTITUENT statements as written [ScSi-08GTT.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-08GTT.tdb): SC2SI3_C32, type code %, sha256 `39f96fbdf0474901…` ~~~~text 55: PHASE SC2SI3_C32 % 2 2 3 ! 56: CONST SC2SI3_C32 : SC : SI : ! ~~~~ ## BETA_SC3SI5 (Sc–Si) - Id: `phase:sc-si:sc3si5-beta`; status `needs_review` - No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition; sgte_mmc2_row_incomplete - Candidate (sgte_mmc2): (beta-Sc3Si5) — Hallstedt 2025 mmc2 row for BETA_SC3SI5: beta-Sc3Si5 - Stoichiometry: Sc 0.3750, Si 0.6250 - Stability: stable in 1 of 1 calculated diagram(s): 1342.73–1536.12 K, x(Si) 0.625–0.625 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:sc3si5-beta) Names (5): _corpus: _corpus:phase:sc-si:sc3si5-beta, corpus:phase:sc-si:beta-sc3si5 _paper: _paper:10.1007/s10973-014-4216-2:(βSc3Si5), paper:10.1007/s10973-014-4216-2:βSc3Si5 _tdb: _tdb:ScSi-15Qin.tdb:BETA_SC3SI5 ### TDB models of BETA_SC3SI5 (1): PHASE and CONSTITUENT statements as written [ScSi-15Qin.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb): BETA_SC3SI5, type code %, sha256 `e29b1390094334c4…` ~~~~text 61: PHASE BETA_SC3SI5 % 2 3 5 ! 62: CONST BETA_SC3SI5 : SC : SI : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf00794560](https://doi.org/10.1007/bf00794560) V. N. Eremenko, K. A. Meleshevich, Yu. I. Buyanov, P. S. Martsenyuk, Phase equilibria in the scandium-silicon system, Powder Metall Met Ceram 27, 967-972 (1988). _cited as the source of values for this phase_ ## ALPHA_SC3SI5_C32 (Sc–Si) - Id: `phase:sc-si:sc3si5-c32-alpha`; status `needs_review` - No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_C32; stoichiometry_contradicts_C32:ScSi-15Qin.tdb - Candidate (name_token): AlB2 · C32 · hP3 · P6/mmm (191) — Strukturbericht/word 'C32' in the TDB name - Candidate (sgte_mmc2): AlB2 · C32 · hP3 · P6/mmm (191) — Hallstedt 2025 mmc2 row for ALPHA_SC3SI5_C32: alpha-Sc3Si5 - Candidate (tdb_comment): AlB2 · hP3 · P6/mmm — ScSi-15Qin.tdb: 'Prototype AlB2 (hP3, P6/mmm)' - Stoichiometry: Sc 0.3750, Si 0.6250 - Stability: stable in 1 of 1 calculated diagram(s): 1198.66–1342.73 K, x(Si) 0.625–0.625 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:sc3si5-c32-alpha) Names (4): _corpus: _corpus:phase:sc-si:sc3si5-c32-alpha, corpus:phase:sc-si:alpha-sc3si5-c32 _paper: _paper:10.1007/s10973-014-4216-2:αSc3Si5 _tdb: _tdb:ScSi-15Qin.tdb:ALPHA_SC3SI5_C32 ### TDB models of ALPHA_SC3SI5_C32 (1): PHASE and CONSTITUENT statements as written [ScSi-15Qin.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb): ALPHA_SC3SI5_C32, type code %, sha256 `e29b1390094334c4…` ~~~~text 56: PHASE ALPHA_SC3SI5_C32 % 2 3 5 ! 57: CONST ALPHA_SC3SI5_C32 : SC : SI : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf00794560](https://doi.org/10.1007/bf00794560) V. N. Eremenko, K. A. Meleshevich, Yu. I. Buyanov, P. S. Martsenyuk, Phase equilibria in the scandium-silicon system, Powder Metall Met Ceram 27, 967-972 (1988). _cited as the source of values for this phase_ ## SC5SI3_D88 (Sc–Si) - Id: `phase:sc-si:sc5si3-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-aaaaalow and oqmd-4475, space group 193 - Stoichiometry: Sc 0.6250, Si 0.3750 - Stability: stable in 2 of 2 calculated diagram(s): 300–2333.6 K, x(Si) 0.375–0.375 - Literature: 11 values (11 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:sc5si3-d88) Names (6): _corpus: _corpus:phase:sc-si:sc5si3-d88 _mp: _mp:mp-aaaaalow _oqmd: _oqmd:oqmd-4475 _paper: _paper:10.1007/s10973-014-4216-2:Sc5Si3 _tdb: _tdb:ScSi-08GTT.tdb:SC5SI3_D88, tdb:ScSi-15Qin.tdb:SC5SI3_D88 ### TDB models of SC5SI3_D88 (2): PHASE and CONSTITUENT statements as written [ScSi-08GTT.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-08GTT.tdb): SC5SI3_D88, type code %, sha256 `39f96fbdf0474901…` ~~~~text 45: PHASE SC5SI3_D88 % 2 5 3 ! 46: CONST SC5SI3_D88 : SC : SI : ! ~~~~ [ScSi-15Qin.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb): SC5SI3_D88, type code %, sha256 `e29b1390094334c4…` ~~~~text 46: PHASE SC5SI3_D88 % 2 5 3 ! 47: CONST SC5SI3_D88 : SC : SI : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf00794560](https://doi.org/10.1007/bf00794560) V. N. Eremenko, K. A. Meleshevich, Yu. I. Buyanov, P. S. Martsenyuk, Phase equilibria in the scandium-silicon system, Powder Metall Met Ceram 27, 967-972 (1988). _cited as the source of values for this phase_ - [doi:10.1007/bf02670193](https://doi.org/10.1007/bf02670193) Letitia Topor, O. J. Kleppa, Standard enthalpy of formation of Sc5Si3, Metall Trans B 20, 879-882 (1989). _cited as the source of values for this phase_ - [doi:10.1016/0925-8388(92)90229-3](https://doi.org/10.1016/0925-8388%2892%2990229-3) G.M Lukashenko, R.I Polotskaya, V.R Sidorko, Thermodynamic properties of scandium, lanthanum, neodymium and gadolinium silicides and germanides, Journal of Alloys and Compounds 179, 299-305 (1992). _cited as the source of values for this phase_ ## SCSI_B33 (Sc–Si) - Id: `phase:sc-si:scsi-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-aaaaaotl and oqmd-7936, space group 63 - Stoichiometry: Sc 0.5000, Si 0.5000 - Stability: stable in 2 of 2 calculated diagram(s): 300–2056.92 K, x(Si) 0.5–0.5 - Literature: 11 values (11 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:sc-si:scsi-b33) Names (6): _corpus: _corpus:phase:sc-si:scsi-b33 _mp: _mp:mp-aaaaaotl _oqmd: _oqmd:oqmd-7936 _paper: _paper:10.1007/s10973-014-4216-2:ScSi _tdb: _tdb:ScSi-08GTT.tdb:SCSI_B33, tdb:ScSi-15Qin.tdb:SCSI_B33 ### TDB models of SCSI_B33 (2): PHASE and CONSTITUENT statements as written [ScSi-08GTT.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-08GTT.tdb): SCSI_B33, type code %, sha256 `39f96fbdf0474901…` ~~~~text 50: PHASE SCSI_B33 % 2 1 1 ! 51: CONST SCSI_B33 : SC : SI : ! ~~~~ [ScSi-15Qin.tdb](https://orchid-project.org/data/databases/sgte-binary/ScSi-15Qin.tdb): SCSI_B33, type code %, sha256 `e29b1390094334c4…` ~~~~text 51: PHASE SCSI_B33 % 2 1 1 ! 52: CONST SCSI_B33 : SC : SI : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1007/s10973-014-4216-2](https://doi.org/10.1007/s10973-014-4216-2) Aning Qin, Dandan Liu, Chong Chen, Shuhong Liu, Yong Du, Man Wang et al., Heat contents of Sc5Si3 and ScSi intermetallics and thermodynamic modeling of the Sc–Si system, J Therm Anal Calorim 119, 1315-1321 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf00794560](https://doi.org/10.1007/bf00794560) V. N. Eremenko, K. A. Meleshevich, Yu. I. Buyanov, P. S. Martsenyuk, Phase equilibria in the scandium-silicon system, Powder Metall Met Ceram 27, 967-972 (1988). _cited as the source of values for this phase_ - [doi:10.1016/0925-8388(92)90229-3](https://doi.org/10.1016/0925-8388%2892%2990229-3) G.M Lukashenko, R.I Polotskaya, V.R Sidorko, Thermodynamic properties of scandium, lanthanum, neodymium and gadolinium silicides and germanides, Journal of Alloys and Compounds 179, 299-305 (1992). _cited as the source of values for this phase_ - [doi:10.1016/s0925-8388(97)00528-8](https://doi.org/10.1016/s0925-8388%2897%2900528-8) S.V Meschel, O.J Kleppa, Standard enthalpies of formation of some 3d transition metal silicides by high temperature direct synthesis calorimetry, Journal of Alloys and Compounds 267, 128-135 (1998). _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).