# B–Mn phases > B–Mn system: 13 phases (tier A 8, tier C 1, liquid 1, needs_review 3); 12 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/B-MN.html · Markdown: https://data.orchid-project.org/phases/pages/B-MN.md 13 phases (tier A 8, tier C 1, liquid 1, needs_review 3); 12 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=B-MN) · [full JSON](https://data.orchid-project.org/phases/systems/B-MN.json) · [B–Mn system page](https://data.orchid-project.org/systems/B-MN.html) · [Markdown](https://data.orchid-project.org/phases/pages/B-MN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the B–Mn system (13) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BETA_RHOMBO_B](#phase-b-mn-b-beta-rhombo); _phase:b-mn:b-beta-rhombo_ | | needs_review | stable in 1 of 1 calculated diagram(s): 300–2361.93 K, x(B) 0.95882–1 | 7 | 1 | | [BCC_A2](#phase-b-mn-bcc-a2); _phase:b-mn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1410.94–1519 K, x(B) 0–2e-05 | 4 | 1 | | [CBCC_A12](#phase-b-mn-cbcc-a12); _phase:b-mn:cbcc-a12_ | alpha-Mn · A12 · cI58 · I-43m (217) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–980 K, x(B) 0–0 | 0 | 1 | | [CUB_A13](#phase-b-mn-cub-a13); _phase:b-mn:cub-a13_ | beta-Mn · A13 · cP20 · P4_132 (213) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 980–1360.15 K, x(B) 0–2e-05 | 0 | 1 | | [FCC_A1](#phase-b-mn-fcc-a1); _phase:b-mn:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1360–1496 K, x(B) 0–0 | 3 | 1 | | [HCP_A3](#phase-b-mn-hcp-a3); _phase:b-mn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 | | [LIQUID](#phase-b-mn-liquid); _phase:b-mn:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 1477.28–4000 K, x(B) 0–1 | 28 | 1 | | [MN2B_C16](#phase-b-mn-mn2b-c16); _phase:b-mn:mn2b-c16_ | Al2Cu · C16 · tI12 · I4/mcm (140) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1818.84 K, x(B) 0.33333–0.33333 | 15 | 1 | | [MN2B_CB](#phase-b-mn-mn2b-cb); _phase:b-mn:mn2b-cb_ | | needs_review | stable in 1 of 1 calculated diagram(s): 300–1397.25 K, x(B) 0.32931–0.32931 | 6 | 1 | | [MN3B4_D7B](#phase-b-mn-mn3b4-d7b); _phase:b-mn:mn3b4-d7b_ | Ta3B4 · D7_b · oI14 · Immm (71) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2079.63 K, x(B) 0.57143–0.57143 | 13 | 1 | | [MNB_B27](#phase-b-mn-mnb-b27); _phase:b-mn:mnb-b27_ | FeB · B27 · oP8 · Pnma (62) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–2160.9 K, x(B) 0.5–0.5 | 14 | 1 | | [MNB2_C32](#phase-b-mn-mnb2-c32); _phase:b-mn:mnb2-c32_ | AlB2 · C32 · hP3 · P6/mmm (191) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1358.71–2106.93 K, x(B) 0.66667–0.66667 | 19 | 1 | | [MNB4](#phase-b-mn-mnb4); _phase:b-mn:mnb4_ | | needs_review | stable in 1 of 1 calculated diagram(s): 300–1648.61 K, x(B) 0.8–0.8 | 12 | 1 | ## BETA_RHOMBO_B (B–Mn) - Id: `phase:b-mn:b-beta-rhombo`; status `needs_review` - No structure assigned. Why: name_has_descriptive_tokens:RHOMBO; no_structure_token - Candidate (sgte_mmc2): beta-B · hR105 · R-3m (166) — Hallstedt 2025 mmc2 row for BETA_RHOMBO_B: beta-B - Candidate (tdb_comment): beta-B · hR105 · R-3m — MnB-10Sun.tdb: 'Prototype beta-B (hR105, R-3m)' - Stability: stable in 1 of 1 calculated diagram(s): 300–2361.93 K, x(B) 0.95882–1 - Literature: 7 values (7 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:b-beta-rhombo) Names (4): _corpus: _corpus:phase:b-mn:b-beta-rhombo, corpus:phase:b-mn:beta-rhombo-b _paper: _paper:10.1007/s11669-010-9740-6:βB _tdb: _tdb:MnB-10Sun.tdb:BETA_RHOMBO_B ### TDB models of BETA_RHOMBO_B (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): BETA_RHOMBO_B, type code %, sha256 `11f9ca583b9dcc65…` ~~~~text 51: PHASE BETA_RHOMBO_B % 1 1 ! 52: CONST BETA_RHOMBO_B : B% MN : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02652172](https://doi.org/10.1007/bf02652172) H. Okamoto, B-Mn (Boron-Manganese), J. Phase Equilib., 1993, 14(1), p 121-122 _cited as the source of values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ - [doi:10.3891/acta.chem.scand.24-1791](https://doi.org/10.3891/acta.chem.scand.24-1791) Sven Andersson, Jan-Otto Carlsson, E. E. Astrup, S. Liaaen-Jensen, Aud Lamvik, Erling Sunde et al., The Crystal Structure of MnB4., Acta Chem. Scand. 24, 1791-1799 (1970). _cited as the source of values for this phase_ ## BCC_A2 (B–Mn) - Id: `phase:b-mn:bcc-a2`; status `assigned` - Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 1410.94–1519 K, x(B) 0–2e-05 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:bcc-a2) Names (3): _corpus: _corpus:phase:b-mn:bcc-a2 _paper: _paper:10.1007/s11669-010-9740-6:δMn _tdb: _tdb:MnB-10Sun.tdb:BCC_A2 ### TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): BCC_A2, type code %B, sha256 `11f9ca583b9dcc65…` ~~~~text 31: PHASE BCC_A2 %B 2 1 3 ! 32: CONST BCC_A2 : MN : B VA% : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02652172](https://doi.org/10.1007/bf02652172) H. Okamoto, B-Mn (Boron-Manganese), J. Phase Equilib., 1993, 14(1), p 121-122 _cited as the source of values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ ## CBCC_A12 (B–Mn) - Id: `phase:b-mn:cbcc-a12`; status `assigned` - Structure: alpha-Mn · A12 · cI58 · I-43m (217); type `st:a12-alpha-mn-ci58`; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 300–980 K, x(B) 0–0 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:cbcc-a12) Names (2): _corpus: _corpus:phase:b-mn:cbcc-a12 _tdb: _tdb:MnB-10Sun.tdb:CBCC_A12 ### TDB models of CBCC_A12 (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): CBCC_A12, type code %A, sha256 `11f9ca583b9dcc65…` ~~~~text 41: PHASE CBCC_A12 %A 2 1 1 ! 42: CONST CBCC_A12 : MN : B VA% : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase_ ## CUB_A13 (B–Mn) - Id: `phase:b-mn:cub-a13`; status `assigned` - Structure: beta-Mn · A13 · cP20 · P4_132 (213); type `st:a13-beta-mn-cp20`; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 980–1360.15 K, x(B) 0–2e-05 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:cub-a13) Names (2): _corpus: _corpus:phase:b-mn:cub-a13 _tdb: _tdb:MnB-10Sun.tdb:CUB_A13 ### TDB models of CUB_A13 (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): CUB_A13, type code %, sha256 `11f9ca583b9dcc65…` ~~~~text 46: PHASE CUB_A13 % 2 1 1 ! 47: CONST CUB_A13 : MN : B VA% : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase_ ## FCC_A1 (B–Mn) - Id: `phase:b-mn:fcc-a1`; status `assigned` - Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 1360–1496 K, x(B) 0–0 - Literature: 3 values (3 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:fcc-a1) Names (3): _corpus: _corpus:phase:b-mn:fcc-a1 _paper: _paper:10.1007/s11669-010-9740-6:γMn _tdb: _tdb:MnB-10Sun.tdb:FCC_A1 ### TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): FCC_A1, type code %A, sha256 `11f9ca583b9dcc65…` ~~~~text 26: PHASE FCC_A1 %A 2 1 1 ! 27: CONST FCC_A1 : MN : B VA% : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ ## HCP_A3 (B–Mn) - Id: `phase:b-mn: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 1 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:hcp-a3) Names (2): _corpus: _corpus:phase:b-mn:hcp-a3 _tdb: _tdb:MnB-10Sun.tdb:HCP_A3 ### TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): HCP_A3, type code %A, sha256 `11f9ca583b9dcc65…` ~~~~text 36: PHASE HCP_A3 %A 2 1 0.5 ! 37: CONST HCP_A3 : MN : B VA% : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase_ ## LIQUID (B–Mn) - Id: `phase:b-mn:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 1477.28–4000 K, x(B) 0–1 - Literature: 28 values (28 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:liquid) Names (3): _corpus: _corpus:phase:b-mn:liquid _paper: _paper:10.1007/s11669-010-9740-6:L _tdb: _tdb:MnB-10Sun.tdb:LIQUID ### TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): LIQUID, type code %, sha256 `11f9ca583b9dcc65…` ~~~~text 21: PHASE LIQUID:L % 1 1 ! 22: CONST LIQUID:L : B MN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02652172](https://doi.org/10.1007/bf02652172) H. Okamoto, B-Mn (Boron-Manganese), J. Phase Equilib., 1993, 14(1), p 121-122 _cited as the source of values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ ## MN2B_C16 (B–Mn) - Id: `phase:b-mn:mn2b-c16`; status `assigned` - Structure: Al2Cu · C16 · tI12 · I4/mcm (140); type `st:c16-al2cu-ti12`; tier A: standard phase name; confidence high - Stoichiometry: B 0.3333, Mn 0.6667 - Stability: stable in 1 of 1 calculated diagram(s): 300–1818.84 K, x(B) 0.33333–0.33333 - Literature: 15 values (15 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:mn2b-c16) Names (3): _corpus: _corpus:phase:b-mn:mn2b-c16 _paper: _paper:10.1007/s11669-010-9740-6:t-Mn2B _tdb: _tdb:MnB-10Sun.tdb:MN2B_C16 ### TDB models of MN2B_C16 (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): MN2B_C16, type code %, sha256 `11f9ca583b9dcc65…` ~~~~text 61: PHASE MN2B_C16 % 2 0.666667 0.333333 ! 62: CONST MN2B_C16 : MN : B : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ - [doi:10.1007/bf02652172](https://doi.org/10.1007/bf02652172) H. Okamoto, B-Mn (Boron-Manganese), J. Phase Equilib., 1993, 14(1), p 121-122 _cited as the source of values for this phase_ ## MN2B_CB (B–Mn) - Id: `phase:b-mn:mn2b-cb`; status `needs_review` - No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_C_b; stoichiometry_contradicts_C_b:MnB-10Sun.tdb - Candidate (literature_printed): CuMg2 · oF48 — printed with a label mapped to this phase - Candidate (name_token): CuMg2 · C_b · oF48 · Fddd (70) — Strukturbericht/word 'CB' in the TDB name - Candidate (sgte_mmc2): CuMg2 · C_b · oF48 · Fddd (70) — Hallstedt 2025 mmc2 row for MN2B_CB: Mn2B0.982 - Candidate (tdb_comment): CuMg2 · oF48 · Fddd — MnB-10Sun.tdb: 'Prototype CuMg2 (oF48, Fddd)' - Stoichiometry: B 0.3293, Mn 0.6707 - Stability: stable in 1 of 1 calculated diagram(s): 300–1397.25 K, x(B) 0.32931–0.32931 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:mn2b-cb) Names (3): _corpus: _corpus:phase:b-mn:mn2b-cb _paper: _paper:10.1007/s11669-010-9740-6:o-Mn2B0.982 _tdb: _tdb:MnB-10Sun.tdb:MN2B_CB ### TDB models of MN2B_CB (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): MN2B_CB, type code %, sha256 `11f9ca583b9dcc65…` ~~~~text 56: PHASE MN2B_CB % 2 0.670691 0.329309 ! 57: CONST MN2B_CB : MN : B : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ ## MN3B4_D7B (B–Mn) - Id: `phase:b-mn:mn3b4-d7b`; status `assigned` - Structure: Ta3B4 · D7_b · oI14 · Immm (71); type `st:d7-b-ta3b4-oi14`; tier A: standard phase name; confidence high - Stoichiometry: B 0.5714, Mn 0.4286 - Stability: stable in 1 of 1 calculated diagram(s): 300–2079.63 K, x(B) 0.57143–0.57143 - Literature: 13 values (13 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:mn3b4-d7b) Names (3): _corpus: _corpus:phase:b-mn:mn3b4-d7b _paper: _paper:10.1007/s11669-010-9740-6:Mn3B4 _tdb: _tdb:MnB-10Sun.tdb:MN3B4_D7B ### TDB models of MN3B4_D7B (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): MN3B4_D7B, type code %, sha256 `11f9ca583b9dcc65…` ~~~~text 71: PHASE MN3B4_D7B % 2 0.428571 0.571429 ! 72: CONST MN3B4_D7B : MN : B : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ - [doi:10.1007/bf02652172](https://doi.org/10.1007/bf02652172) H. Okamoto, B-Mn (Boron-Manganese), J. Phase Equilib., 1993, 14(1), p 121-122 _cited as the source of values for this phase_ - [doi:10.3891/acta.chem.scand.24-1791](https://doi.org/10.3891/acta.chem.scand.24-1791) Sven Andersson, Jan-Otto Carlsson, E. E. Astrup, S. Liaaen-Jensen, Aud Lamvik, Erling Sunde et al., The Crystal Structure of MnB4., Acta Chem. Scand. 24, 1791-1799 (1970). _cited as the source of values for this phase_ ## MNB_B27 (B–Mn) - Id: `phase:b-mn:mnb-b27`; status `assigned` - Structure: FeB · B27 · oP8 · Pnma (62); type `st:b27-feb-op8`; 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 (dft_space_group_62_matches_5_structure_types, no_structure_token, structure_token_is_also_a_formula); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: B 0.5000, Mn 0.5000 - Stability: stable in 1 of 1 calculated diagram(s): 300–2160.9 K, x(B) 0.5–0.5 - Literature: 14 values (14 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:mnb-b27) Names (3): _corpus: _corpus:phase:b-mn:mnb-b27 _paper: _paper:10.1007/s11669-010-9740-6:MnB _tdb: _tdb:MnB-10Sun.tdb:MNB_B27 ### TDB models of MNB_B27 (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): MNB_B27, type code %, sha256 `11f9ca583b9dcc65…` ~~~~text 66: PHASE MNB_B27 % 2 0.5 0.5 ! 67: CONST MNB_B27 : MN : B : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ - [doi:10.1007/bf02652172](https://doi.org/10.1007/bf02652172) H. Okamoto, B-Mn (Boron-Manganese), J. Phase Equilib., 1993, 14(1), p 121-122 _cited as the source of values for this phase_ ## MNB2_C32 (B–Mn) - Id: `phase:b-mn:mnb2-c32`; status `assigned` - Structure: AlB2 · C32 · hP3 · P6/mmm (191); type `st:c32-alb2-hp3`; tier A: standard phase name; confidence high - Stoichiometry: B 0.6667, Mn 0.3333 - Stability: stable in 1 of 1 calculated diagram(s): 1358.71–2106.93 K, x(B) 0.66667–0.66667 - Literature: 19 values (19 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:mnb2-c32) Names (3): _corpus: _corpus:phase:b-mn:mnb2-c32 _paper: _paper:10.1007/s11669-010-9740-6:MnB2 _tdb: _tdb:MnB-10Sun.tdb:MNB2_C32 ### TDB models of MNB2_C32 (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): MNB2_C32, type code %, sha256 `11f9ca583b9dcc65…` ~~~~text 76: PHASE MNB2_C32 % 2 0.333333 0.666667 ! 77: CONST MNB2_C32 : MN : B : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ - [doi:10.1007/bf02652172](https://doi.org/10.1007/bf02652172) H. Okamoto, B-Mn (Boron-Manganese), J. Phase Equilib., 1993, 14(1), p 121-122 _cited as the source of values for this phase_ - [doi:10.3891/acta.chem.scand.24-1791](https://doi.org/10.3891/acta.chem.scand.24-1791) Sven Andersson, Jan-Otto Carlsson, E. E. Astrup, S. Liaaen-Jensen, Aud Lamvik, Erling Sunde et al., The Crystal Structure of MnB4., Acta Chem. Scand. 24, 1791-1799 (1970). _cited as the source of values for this phase_ ## MNB4 (B–Mn) - Id: `phase:b-mn:mnb4`; status `needs_review` - No structure assigned. Why: assessment_declared_blocked_by:sgte_mmc2_row_disagrees_with_dft; dft_space_group_14_matches_2_structure_types; no_structure_token; sgte_mmc2_row_disagrees_with_dft - Candidate (dft_mp): P2_1/c (14) — on-hull MP MnB4 at x(MN)=0.2000 - Candidate (dft_oqmd): P21/c (14) — on-hull OQMD B4 Mn1 at x(MN)=0.2000 - Candidate (dft_space_group_and_stoichiometry): CsTe4 · mP20 · P2_1/c (14) — space group 14 and stoichiometry match - Candidate (dft_space_group_and_stoichiometry): (FeP4) · P2_1/c (14) — space group 14 and stoichiometry match - Candidate (literature_printed): MnB4 · mC10 — printed with a label mapped to this phase - Candidate (sgte_mmc2): MnB4 · mC10 · C2/m (12) — Hallstedt 2025 mmc2 row for MNB4: MnB4 - Candidate (tdb_comment): MnB4 · mC10 · C2/m — MnB-10Sun.tdb: 'Prototype MnB4 (mC10, C2/m)' - Stoichiometry: B 0.8000, Mn 0.2000 - Stability: stable in 1 of 1 calculated diagram(s): 300–1648.61 K, x(B) 0.8–0.8 - Literature: 12 values (12 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:b-mn:mnb4) Names (3): _corpus: _corpus:phase:b-mn:mnb4 _paper: _paper:10.1007/s11669-010-9740-6:MnB4 _tdb: _tdb:MnB-10Sun.tdb:MNB4 ### TDB models of MNB4 (1): PHASE and CONSTITUENT statements as written [MnB-10Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/MnB-10Sun.tdb): MNB4, type code %, sha256 `11f9ca583b9dcc65…` ~~~~text 81: PHASE MNB4 % 2 0.2 0.8 ! 82: CONST MNB4 : MN : B : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1007/s11669-010-9740-6](https://doi.org/10.1007/s11669-010-9740-6) Weihua Sun, Yong Du, Shuhong Liu, Baiyun Huang, Chao Jiang, Thermodynamic Assessment of the Mn-B System, J. Phase Equilib. Diffus. 31, 357-364 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/bf02869863](https://doi.org/10.1007/bf02869863) P.K. Liao and K.E. Spear, The B-Mn (Boron-Manganese) System, Bull. Alloy Phase Diag., 1986, 7(6), p 543-549, p 585-586 _cited as the source of values for this phase_ - [doi:10.1007/bf02652172](https://doi.org/10.1007/bf02652172) H. Okamoto, B-Mn (Boron-Manganese), J. Phase Equilib., 1993, 14(1), p 121-122 _cited as the source of values for this phase_ - [doi:10.3891/acta.chem.scand.24-1791](https://doi.org/10.3891/acta.chem.scand.24-1791) Sven Andersson, Jan-Otto Carlsson, E. E. Astrup, S. Liaaen-Jensen, Aud Lamvik, Erling Sunde et al., The Crystal Structure of MnB4., Acta Chem. Scand. 24, 1791-1799 (1970). _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).