B–Mg phases

10 phases (tier A 3, tier B 1, tier C 3, liquid 1, gas 1, needs_review 1); 8 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 · full JSON · B–Mg system page · Markdown · field reference

Phases of the B–Mg system (10)
PhaseStructureBasisStability (calculated)Literature valuesTDB models
BETA_RHOMBO_B
phase:b-mg:b-beta-rhombo
needs_reviewstable in 2 of 2 calculated diagram(s): 300–2351.38 K, x(B) 1–102
BCC_A2
phase:b-mg:bcc-a2
W · A2 · cI2 · Im-3m (229)tier A: standard phase namenot stable in 2 calculated diagram(s)02
MB2_C32
phase:b-mg:c32-mb2
AlB2 · C32 · hP3 · P6/mmm (191)tier C: assessor-stated (Hallstedt 2025 crystallographic table)stable in 2 of 2 calculated diagram(s): 300–1979.09 K, x(B) 0.66667–0.66667272
FCC_A1
phase:b-mg:fcc-a1
Cu · A1 · cF4 · Fm-3m (225)tier A: standard phase namenot stable in 2 calculated diagram(s)02
GAS
phase:b-mg:gas
gasgasstable in 2 of 2 calculated diagram(s): 1367.63–4000 K, x(B) 0–0.5247542
HCP_A3
phase:b-mg:hcp-a3
Mg · A3 · hP2 · P6_3/mmc (194)tier A: standard phase namestable in 2 of 2 calculated diagram(s): 300–1468 K, x(B) 0–012
LIQUID
phase:b-mg:liquid
liquidliquidstable in 2 of 2 calculated diagram(s): 922.85–4000 K, x(B) 0–142
MGB20
phase:b-mg:mgb20
ScB28 · hR119 · R-3m (166)tier C: assessor-stated (Hallstedt 2025 crystallographic table)stable in 1 of 1 calculated diagram(s): 300–2465.49 K, x(B) 0.95238–0.95238121
MGB4
phase:b-mg:mgb4
MgB4 · oP20 · Pnma (62)tier C: assessor-stated (Hallstedt 2025 crystallographic table)stable in 2 of 2 calculated diagram(s): 300–2281.82 K, x(B) 0.8–0.8272
MGB7
phase:b-mg:mgb7
MgB7 · oI64 · Imma (74)tier B: DFT-supported (unique MP + OQMD match)stable in 2 of 2 calculated diagram(s): 300–2424.01 K, x(B) 0.875–0.875182

BETA_RHOMBO_B (B–Mg)

Names (4): corpus: corpus:phase:b-mg:b-beta-rhombo, corpus:phase:b-mg:beta-rhombo-b
tdb: tdb:MgB-01Liu-LB.tdb:BETA_RHOMBO_B, tdb:MgB-05Bal.tdb:BETA_RHOMBO_B

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

MgB-01Liu-LB.tdb: BETA_RHOMBO_B, type code %, sha256 8309e62bcb5a44e3…

47: PHASE BETA_RHOMBO_B % 1 1 !
48: CONST BETA_RHOMBO_B : B : !

MgB-05Bal.tdb: BETA_RHOMBO_B, type code %, sha256 560f62e9d31af938…

49: PHASE BETA_RHOMBO_B % 1 1 !
50: CONST BETA_RHOMBO_B : B : !

Example references (2 of 2; assessments first):

BCC_A2 (B–Mg)

Names (3): corpus: corpus:phase:b-mg:bcc-a2
tdb: tdb:MgB-01Liu-LB.tdb:BCC_A2, tdb:MgB-05Bal.tdb:BCC_A2

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

MgB-01Liu-LB.tdb: BCC_A2, type code %B, sha256 8309e62bcb5a44e3…

37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : MG : VA : !

MgB-05Bal.tdb: BCC_A2, type code %B, sha256 560f62e9d31af938…

39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : MG : VA : !

Example references (2 of 2; assessments first):

MB2_C32 (B–Mg)

Names (8): corpus: corpus:phase:b-mg:c32-mb2, corpus:phase:b-mg:mb2-c32
mp: mp:mp-aaaaabdj
oqmd: oqmd:oqmd-98302
paper: paper:10.1016/j.jpcs.2004.06.063:MgB2, paper:10.1016/s0364-5916(01)00050-5:MgB2
tdb: tdb:MgB-01Liu-LB.tdb:MB2_C32, tdb:MgB-05Bal.tdb:MB2_C32

TDB models of MB2_C32 (2): PHASE and CONSTITUENT statements as written

MgB-01Liu-LB.tdb: MB2_C32, type code %, sha256 8309e62bcb5a44e3…

52: PHASE MB2_C32 % 2 1 2 !
53: CONST MB2_C32 : MG : B : !

MgB-05Bal.tdb: MB2_C32, type code %, sha256 560f62e9d31af938…

54: PHASE MB2_C32 % 2 1 2 !
55: CONST MB2_C32 : MG : B : !

Example references (3 of 3; assessments first):

FCC_A1 (B–Mg)

Names (3): corpus: corpus:phase:b-mg:fcc-a1
tdb: tdb:MgB-01Liu-LB.tdb:FCC_A1, tdb:MgB-05Bal.tdb:FCC_A1

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

MgB-01Liu-LB.tdb: FCC_A1, type code %A, sha256 8309e62bcb5a44e3…

32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : MG : VA : !

MgB-05Bal.tdb: FCC_A1, type code %A, sha256 560f62e9d31af938…

34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : MG : VA : !

Example references (2 of 2; assessments first):

GAS (B–Mg)

Names (4): corpus: corpus:phase:b-mg:gas
paper: paper:10.1016/s0364-5916(01)00050-5:gas
tdb: tdb:MgB-01Liu-LB.tdb:GAS, tdb:MgB-05Bal.tdb:GAS

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

MgB-01Liu-LB.tdb: GAS, type code %, sha256 8309e62bcb5a44e3…

65: PHASE GAS:G % 1 1 !
66: CONST GAS:G : B B2 MG MG2 : !

MgB-05Bal.tdb: GAS, type code %, sha256 560f62e9d31af938…

72: PHASE GAS:G % 1 1 !
73: CONST GAS:G : B B2 MG MG2 : !

Example references (2 of 2; assessments first):

HCP_A3 (B–Mg)

Names (4): corpus: corpus:phase:b-mg:hcp-a3
paper: paper:10.1016/s0364-5916(01)00050-5:hcp
tdb: tdb:MgB-01Liu-LB.tdb:HCP_A3, tdb:MgB-05Bal.tdb:HCP_A3

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

MgB-01Liu-LB.tdb: HCP_A3, type code %A, sha256 8309e62bcb5a44e3…

42: PHASE HCP_A3 %A 2 1 0.5 !
43: CONST HCP_A3 : MG% : VA : !

MgB-05Bal.tdb: HCP_A3, type code %A, sha256 560f62e9d31af938…

44: PHASE HCP_A3 %A 2 1 0.5 !
45: CONST HCP_A3 : MG% : VA : !

Example references (2 of 2; assessments first):

LIQUID (B–Mg)

Names (4): corpus: corpus:phase:b-mg:liquid
paper: paper:10.1016/s0364-5916(01)00050-5:liq
tdb: tdb:MgB-01Liu-LB.tdb:LIQUID, tdb:MgB-05Bal.tdb:LIQUID

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

MgB-01Liu-LB.tdb: LIQUID, type code %, sha256 8309e62bcb5a44e3…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : B MG : !

MgB-05Bal.tdb: LIQUID, type code %, sha256 560f62e9d31af938…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : B MG : !

Example references (2 of 2; assessments first):

MGB20 (B–Mg)

Names (3): corpus: corpus:phase:b-mg:mgb20
paper: paper:10.1016/j.jpcs.2004.06.063:MgB20
tdb: tdb:MgB-05Bal.tdb:MGB20

TDB models of MGB20 (1): PHASE and CONSTITUENT statements as written

MgB-05Bal.tdb: MGB20, type code %, sha256 560f62e9d31af938…

69: PHASE MGB20 % 2 1 20 !
70: CONST MGB20 : MG : B : !

Example references (1 of 1; assessments first):

MGB4 (B–Mg)

Names (5): corpus: corpus:phase:b-mg:mgb4
paper: paper:10.1016/j.jpcs.2004.06.063:MgB4, paper:10.1016/s0364-5916(01)00050-5:MgB4
tdb: tdb:MgB-01Liu-LB.tdb:MGB4, tdb:MgB-05Bal.tdb:MGB4

TDB models of MGB4 (2): PHASE and CONSTITUENT statements as written

MgB-01Liu-LB.tdb: MGB4, type code %, sha256 8309e62bcb5a44e3…

57: PHASE MGB4 % 2 1 4 !
58: CONST MGB4 : MG : B : !

MgB-05Bal.tdb: MGB4, type code %, sha256 560f62e9d31af938…

59: PHASE MGB4 % 2 1 4 !
60: CONST MGB4 : MG : B : !

Example references (5 of 5; assessments first):

MGB7 (B–Mg)

Names (7): corpus: corpus:phase:b-mg:mgb7
mp: mp:mp-aaacdrdz
oqmd: oqmd:oqmd-23820
paper: paper:10.1016/j.jpcs.2004.06.063:MgB7, paper:10.1016/s0364-5916(01)00050-5:MgB7
tdb: tdb:MgB-01Liu-LB.tdb:MGB7, tdb:MgB-05Bal.tdb:MGB7

TDB models of MGB7 (2): PHASE and CONSTITUENT statements as written

MgB-01Liu-LB.tdb: MGB7, type code %, sha256 8309e62bcb5a44e3…

62: PHASE MGB7 % 2 1 7 !
63: CONST MGB7 : MG : B : !

MgB-05Bal.tdb: MGB7, type code %, sha256 560f62e9d31af938…

64: PHASE MGB7 % 2 1 7 !
65: CONST MGB7 : MG : B : !

Example references (4 of 4; assessments first):