Si–Ta phases

11 phases (tier A 8, tier B 1, liquid 1, needs_review 1); 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 · full JSON · Si–Ta system page · Markdown · field reference

Phases of the Si–Ta system (11)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:si-ta:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1696.11 K, x(Ta) 0–0	10	4
BCC_A2 phase:si-ta:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–4000 K, x(Ta) 0.86547–1	9	4
FCC_A1 phase:si-ta:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 4 calculated diagram(s)	0	4
HCP_A3 phase:si-ta:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 4 calculated diagram(s)	0	4
LIQUID phase:si-ta:liquid	liquid	liquid	stable in 4 of 4 calculated diagram(s): 1652.07–4000 K, x(Ta) 0–1	48	4
SI2TA_C40 phase:si-ta:si2ta-c40	CrSi2 · C40 · hP9 · P6_222 (180)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–2313.54 K, x(Ta) 0.33333–0.33333	21	4
SI3TA5 phase:si-ta:si3ta5		needs_review	stable in 2 of 2 calculated diagram(s): 300–2845.19 K, x(Ta) 0.625–0.625	2	2
SI3TA5_D8L phase:si-ta:si3ta5-d8l	Cr5B3 · D8_l · tI32 · I4/mcm (140)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–2433.02 K, x(Ta) 0.625–0.625	10	2
SI3TA5_D8M phase:si-ta:si3ta5-d8m	W5Si3 · D8_m · tI32 · I4/mcm (140)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 2432.86–2840.88 K, x(Ta) 0.625–0.625	9	2
SITA2_C16 phase:si-ta:sita2-c16	Al2Cu · C16 · tI12 · I4/mcm (140)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–2751.8 K, x(Ta) 0.66667–0.66667	13	4
SITA3 phase:si-ta:sita3	Ti3P · tP32 · P4_2/n (86)	tier B: DFT-supported (unique MP + OQMD match)	stable in 4 of 4 calculated diagram(s): 300–2634.72 K, x(Ta) 0.75–0.75	13	4

DIAMOND_A4 (Si–Ta)

Id: phase:si-ta: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 4 of 4 calculated diagram(s): 300–1696.11 K, x(Ta) 0–0
Literature: 10 values (10 accepted) from 3 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:si-ta:a4-diamond, corpus:phase:si-ta:diamond-a4
paper: paper:10.1007/s11669-009-9579-x:(Si), paper:10.1016/0364-5916(89)90007-2:Si(dia), paper:10.1016/j.jallcom.2012.09.148:Si
tdb: tdb:SiTa-03Che-LB.tdb:DIAMOND_A4, tdb:SiTa-09Guo.tdb:DIAMOND_A4, tdb:SiTa-13Dro.tdb:DIAMOND_A4, tdb:SiTa-89Vah.tdb:DIAMOND_A4

TDB models of DIAMOND_A4 (4): PHASE and CONSTITUENT statements as written

SiTa-03Che-LB.tdb: DIAMOND_A4, type code %, sha256 9af74fc82b4f21c6…

43: PHASE DIAMOND_A4 % 1 1 !
44: CONST DIAMOND_A4 : SI : !

SiTa-09Guo.tdb: DIAMOND_A4, type code %, sha256 c62d1268ef582662…

42: PHASE DIAMOND_A4 % 1 1 !
43: CONST DIAMOND_A4 : SI : !

SiTa-13Dro.tdb: DIAMOND_A4, type code %, sha256 ea6e244374f26848…

51: PHASE DIAMOND_A4 % 1 1 !
52: CONST DIAMOND_A4 : SI : !

SiTa-89Vah.tdb: DIAMOND_A4, type code %, sha256 e0c04ce292c0b067…

49: PHASE DIAMOND_A4 % 1 1 !
50: CONST DIAMOND_A4 : SI : !

Example references (3 of 3; assessments first):

doi:10.1016/0364-5916(89)90007-2 C. Vahlas, P.Y. Chevalier, E. Blanquet, A thermodynamic evaluation of four Si-M (M = Mo, Ta, Ti, W) binary systems, Calphad 13, 273-292 (1989).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase; reports values for this phase

BCC_A2 (Si–Ta)

Id: phase:si-ta: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 4 of 4 calculated diagram(s): 300–4000 K, x(Ta) 0.86547–1
Literature: 9 values (9 accepted) from 3 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:si-ta:bcc-a2
paper: paper:10.1007/s11669-009-9579-x:(Ta), paper:10.1016/0364-5916(89)90007-2:Ta(bcc), paper:10.1016/0364-5916(89)90007-2:bcc, paper:10.1016/j.jallcom.2012.09.148:(Ta)
tdb: tdb:SiTa-03Che-LB.tdb:BCC_A2, tdb:SiTa-09Guo.tdb:BCC_A2, tdb:SiTa-13Dro.tdb:BCC_A2, tdb:SiTa-89Vah.tdb:BCC_A2

TDB models of BCC_A2 (4): PHASE and CONSTITUENT statements as written

SiTa-03Che-LB.tdb: BCC_A2, type code %B, sha256 9af74fc82b4f21c6…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : SI TA% : VA : !

SiTa-09Guo.tdb: BCC_A2, type code %B, sha256 c62d1268ef582662…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : SI TA% : VA : !

SiTa-13Dro.tdb: BCC_A2, type code %B, sha256 ea6e244374f26848…

41: PHASE BCC_A2 %B 2 1 3 !
42: CONST BCC_A2 : SI TA% : VA : !

SiTa-89Vah.tdb: BCC_A2, type code %B, sha256 e0c04ce292c0b067…

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

Example references (3 of 3; assessments first):

doi:10.1016/0364-5916(89)90007-2 C. Vahlas, P.Y. Chevalier, E. Blanquet, A thermodynamic evaluation of four Si-M (M = Mo, Ta, Ti, W) binary systems, Calphad 13, 273-292 (1989).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase; reports values for this phase

FCC_A1 (Si–Ta)

Id: phase:si-ta: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 4 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-ta:fcc-a1
tdb: tdb:SiTa-03Che-LB.tdb:FCC_A1, tdb:SiTa-09Guo.tdb:FCC_A1, tdb:SiTa-13Dro.tdb:FCC_A1, tdb:SiTa-89Vah.tdb:FCC_A1

TDB models of FCC_A1 (4): PHASE and CONSTITUENT statements as written

SiTa-03Che-LB.tdb: FCC_A1, type code %A, sha256 9af74fc82b4f21c6…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : SI TA : VA : !

SiTa-09Guo.tdb: FCC_A1, type code %A, sha256 c62d1268ef582662…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : SI TA : VA : !

SiTa-13Dro.tdb: FCC_A1, type code %A, sha256 ea6e244374f26848…

36: PHASE FCC_A1 %A 2 1 1 !
37: CONST FCC_A1 : SI TA : VA : !

SiTa-89Vah.tdb: FCC_A1, type code %A, sha256 e0c04ce292c0b067…

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

Example references (3 of 3; assessments first):

doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase
doi:10.1016/0364-5916(89)90007-2 C. Vahlas, P.Y. Chevalier, E. Blanquet, A thermodynamic evaluation of four Si-M (M = Mo, Ta, Ti, W) binary systems, Calphad 13, 273-292 (1989).
assessment that models this phase
doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase

HCP_A3 (Si–Ta)

Id: phase:si-ta: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 4 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-ta:hcp-a3
tdb: tdb:SiTa-03Che-LB.tdb:HCP_A3, tdb:SiTa-09Guo.tdb:HCP_A3, tdb:SiTa-13Dro.tdb:HCP_A3, tdb:SiTa-89Vah.tdb:HCP_A3

TDB models of HCP_A3 (4): PHASE and CONSTITUENT statements as written

SiTa-03Che-LB.tdb: HCP_A3, type code %A, sha256 9af74fc82b4f21c6…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : SI TA : VA : !

SiTa-09Guo.tdb: HCP_A3, type code %A, sha256 c62d1268ef582662…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : SI TA : VA : !

SiTa-13Dro.tdb: HCP_A3, type code %A, sha256 ea6e244374f26848…

46: PHASE HCP_A3 %A 2 1 0.5 !
47: CONST HCP_A3 : SI TA : VA : !

SiTa-89Vah.tdb: HCP_A3, type code %A, sha256 e0c04ce292c0b067…

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

Example references (3 of 3; assessments first):

doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase
doi:10.1016/0364-5916(89)90007-2 C. Vahlas, P.Y. Chevalier, E. Blanquet, A thermodynamic evaluation of four Si-M (M = Mo, Ta, Ti, W) binary systems, Calphad 13, 273-292 (1989).
assessment that models this phase
doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase

LIQUID (Si–Ta)

Id: phase:si-ta:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 4 of 4 calculated diagram(s): 1652.07–4000 K, x(Ta) 0–1
Literature: 48 values (48 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:si-ta:liquid
paper: paper:10.1007/s11669-009-9579-x:L, paper:10.1016/0364-5916(89)90007-2:L, paper:10.1016/j.jallcom.2012.09.148:L
tdb: tdb:SiTa-03Che-LB.tdb:LIQUID, tdb:SiTa-09Guo.tdb:LIQUID, tdb:SiTa-13Dro.tdb:LIQUID, tdb:SiTa-89Vah.tdb:LIQUID

TDB models of LIQUID (4): PHASE and CONSTITUENT statements as written

SiTa-03Che-LB.tdb: LIQUID, type code %, sha256 9af74fc82b4f21c6…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : SI TA : !

SiTa-09Guo.tdb: LIQUID, type code %, sha256 c62d1268ef582662…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : SI TA : !

SiTa-13Dro.tdb: LIQUID, type code %, sha256 ea6e244374f26848…

31: PHASE LIQUID:L % 1 1 !
32: CONST LIQUID:L : SI TA : !

SiTa-89Vah.tdb: LIQUID, type code %, sha256 e0c04ce292c0b067…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : SI TA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(89)90007-2 C. Vahlas, P.Y. Chevalier, E. Blanquet, A thermodynamic evaluation of four Si-M (M = Mo, Ta, Ti, W) binary systems, Calphad 13, 273-292 (1989).
assessment that models this phase; reports values for this phase

SI2TA_C40 (Si–Ta)

Id: phase:si-ta:si2ta-c40; status assigned
Structure: CrSi2 · C40 · hP9 · P6_222 (180); type st:c40-crsi2-hp9; tier A: standard phase name; confidence high
Stoichiometry: Si 0.6667, Ta 0.3333
Stability: stable in 4 of 4 calculated diagram(s): 300–2313.54 K, x(Ta) 0.33333–0.33333
Literature: 21 values (21 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:si-ta:si2ta-c40
paper: paper:10.1007/s11669-009-9579-x:TaSi2, paper:10.1016/0364-5916(89)90007-2:Si2Ta, paper:10.1016/j.jallcom.2012.09.148:Si2Ta
tdb: tdb:SiTa-03Che-LB.tdb:SI2TA_C40, tdb:SiTa-09Guo.tdb:SI2TA_C40, tdb:SiTa-13Dro.tdb:SI2TA_C40, tdb:SiTa-89Vah.tdb:SI2TA_C40

TDB models of SI2TA_C40 (4): PHASE and CONSTITUENT statements as written

SiTa-03Che-LB.tdb: SI2TA_C40, type code %, sha256 9af74fc82b4f21c6…

48: PHASE SI2TA_C40 % 2 2 1 !
49: CONST SI2TA_C40 : SI : TA : !

SiTa-09Guo.tdb: SI2TA_C40, type code %, sha256 c62d1268ef582662…

47: PHASE SI2TA_C40 % 2 2 1 !
48: CONST SI2TA_C40 : SI : TA : !

SiTa-13Dro.tdb: SI2TA_C40, type code %, sha256 ea6e244374f26848…

56: PHASE SI2TA_C40 % 2 2 1 !
57: CONST SI2TA_C40 : SI : TA : !

SiTa-89Vah.tdb: SI2TA_C40, type code %, sha256 e0c04ce292c0b067…

54: PHASE SI2TA_C40 % 2 2 1 !
55: CONST SI2TA_C40 : SI : TA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(89)90007-2 C. Vahlas, P.Y. Chevalier, E. Blanquet, A thermodynamic evaluation of four Si-M (M = Mo, Ta, Ti, W) binary systems, Calphad 13, 273-292 (1989).
assessment that models this phase; reports values for this phase

SI3TA5 (Si–Ta)

Id: phase:si-ta:si3ta5; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition; sgte_mmc2_rows_disagree
Candidate (dft_mp): I4/mcm (140) — on-hull MP Ta5Si3 at x(TA)=0.6250
Candidate (dft_oqmd): I4/mcm (140) — on-hull OQMD Si3 Ta5 at x(TA)=0.6250
Candidate (sgte_mmc2): Cr5B3 · D8_l · tI32 · I4/mcm (140) — Hallstedt 2025 mmc2 row for SI3TA5: alpha-Si3Ta5
Candidate (sgte_mmc2): W5Si3 · D8_m · tI32 · I4/mcm (140) — Hallstedt 2025 mmc2 row for SI3TA5: beta-Si3Ta5
Candidate (tdb_comment): Cr5B3 · tI32 · I4/mcm, SB D8_l — SiTa-03Che-LB.tdb: 'Prototype Cr5B3 (tI32, I4/mcm, SB D8_l) alpha-Si3Ta5'
Candidate (tdb_comment): Cr5B3 · tI32 · I4/mcm, SB D8_l — SiTa-89Vah.tdb: 'Prototype Cr5B3 (tI32, I4/mcm, SB D8_l) alpha-Si3Ta5'
Stoichiometry: Si 0.3750, Ta 0.6250
Stability: stable in 2 of 2 calculated diagram(s): 300–2845.19 K, x(Ta) 0.625–0.625
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:si-ta:si3ta5
paper: paper:10.1016/0364-5916(89)90007-2:Si3Ta5
tdb: tdb:SiTa-03Che-LB.tdb:SI3TA5, tdb:SiTa-89Vah.tdb:SI3TA5

TDB models of SI3TA5 (2): PHASE and CONSTITUENT statements as written

SiTa-03Che-LB.tdb: SI3TA5, type code %, sha256 9af74fc82b4f21c6…

54: PHASE SI3TA5 % 2 3 5 !
55: CONST SI3TA5 : SI : TA : !

SiTa-89Vah.tdb: SI3TA5, type code %, sha256 e0c04ce292c0b067…

60: PHASE SI3TA5 % 2 3 5 !
61: CONST SI3TA5 : SI : TA : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(89)90007-2 C. Vahlas, P.Y. Chevalier, E. Blanquet, A thermodynamic evaluation of four Si-M (M = Mo, Ta, Ti, W) binary systems, Calphad 13, 273-292 (1989).
assessment that models this phase; reports values for this phase

SI3TA5_D8L (Si–Ta)

Id: phase:si-ta:si3ta5-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: Si 0.3750, Ta 0.6250
Stability: stable in 2 of 2 calculated diagram(s): 300–2433.02 K, x(Ta) 0.625–0.625
Literature: 10 values (10 accepted) from 2 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:si-ta:si3ta5-d8l
paper: paper:10.1007/s11669-009-9579-x:αTa5Si3, paper:10.1016/j.jallcom.2012.09.148:Si3Ta5_LT, paper:10.1016/j.jallcom.2012.09.148:Si5Ta3_LT
tdb: tdb:SiTa-09Guo.tdb:SI3TA5_D8L, tdb:SiTa-13Dro.tdb:SI3TA5_D8L

TDB models of SI3TA5_D8L (2): PHASE and CONSTITUENT statements as written

SiTa-09Guo.tdb: SI3TA5_D8L, type code %, sha256 c62d1268ef582662…

52: PHASE SI3TA5_D8L % 2 3 5 !
53: CONST SI3TA5_D8L : SI : TA : !

SiTa-13Dro.tdb: SI3TA5_D8L, type code %, sha256 ea6e244374f26848…

61: PHASE SI3TA5_D8L % 2 3 5 !
62: CONST SI3TA5_D8L : SI : TA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase; reports values for this phase

SI3TA5_D8M (Si–Ta)

Id: phase:si-ta:si3ta5-d8m; status assigned
Structure: W5Si3 · D8_m · tI32 · I4/mcm (140); type st:d8-m-w5si3-ti32; tier A: standard phase name; confidence high
Stoichiometry: Si 0.3750, Ta 0.6250
Stability: stable in 2 of 2 calculated diagram(s): 2432.86–2840.88 K, x(Ta) 0.625–0.625
Literature: 9 values (9 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-ta:si3ta5-d8m
paper: paper:10.1016/j.jallcom.2012.09.148:Si3Ta5_HT, paper:10.1016/j.jallcom.2012.09.148:Si5Ta3_HT
tdb: tdb:SiTa-09Guo.tdb:SI3TA5_D8M, tdb:SiTa-13Dro.tdb:SI3TA5_D8M

TDB models of SI3TA5_D8M (2): PHASE and CONSTITUENT statements as written

SiTa-09Guo.tdb: SI3TA5_D8M, type code %, sha256 c62d1268ef582662…

57: PHASE SI3TA5_D8M % 2 3 5 !
58: CONST SI3TA5_D8M : SI : TA : !

SiTa-13Dro.tdb: SI3TA5_D8M, type code %, sha256 ea6e244374f26848…

66: PHASE SI3TA5_D8M % 2 3 5 !
67: CONST SI3TA5_D8M : SI : TA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase

SITA2_C16 (Si–Ta)

Id: phase:si-ta:sita2-c16; status assigned
Structure: Al2Cu · C16 · tI12 · I4/mcm (140); type st:c16-al2cu-ti12; tier A: standard phase name; confidence high
Stoichiometry: Si 0.3333, Ta 0.6667
Stability: stable in 4 of 4 calculated diagram(s): 300–2751.8 K, x(Ta) 0.66667–0.66667
Literature: 13 values (13 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:si-ta:sita2-c16
paper: paper:10.1007/s11669-009-9579-x:Ta2Si, paper:10.1016/0364-5916(89)90007-2:SiTa2, paper:10.1016/j.jallcom.2012.09.148:SiTa2
tdb: tdb:SiTa-03Che-LB.tdb:SITA2_C16, tdb:SiTa-09Guo.tdb:SITA2_C16, tdb:SiTa-13Dro.tdb:SITA2_C16, tdb:SiTa-89Vah.tdb:SITA2_C16

TDB models of SITA2_C16 (4): PHASE and CONSTITUENT statements as written

SiTa-03Che-LB.tdb: SITA2_C16, type code %, sha256 9af74fc82b4f21c6…

59: PHASE SITA2_C16 % 2 1 2 !
60: CONST SITA2_C16 : SI : TA : !

SiTa-09Guo.tdb: SITA2_C16, type code %, sha256 c62d1268ef582662…

62: PHASE SITA2_C16 % 2 1 2 !
63: CONST SITA2_C16 : SI : TA : !

SiTa-13Dro.tdb: SITA2_C16, type code %, sha256 ea6e244374f26848…

71: PHASE SITA2_C16 % 2 1 2 !
72: CONST SITA2_C16 : SI : TA : !

SiTa-89Vah.tdb: SITA2_C16, type code %, sha256 e0c04ce292c0b067…

65: PHASE SITA2_C16 % 2 1 2 !
66: CONST SITA2_C16 : SI : TA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(89)90007-2 C. Vahlas, P.Y. Chevalier, E. Blanquet, A thermodynamic evaluation of four Si-M (M = Mo, Ta, Ti, W) binary systems, Calphad 13, 273-292 (1989).
assessment that models this phase; reports values for this phase

SITA3 (Si–Ta)

Id: phase:si-ta:sita3; status assigned
Structure: Ti3P · tP32 · P4_2/n (86); type st:ti3p-tp32; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Si 0.2500, Ta 0.7500
Stability: stable in 4 of 4 calculated diagram(s): 300–2634.72 K, x(Ta) 0.75–0.75
Literature: 13 values (13 accepted) from 3 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:si-ta:sita3
mp: mp:mp-aaabgjfa
oqmd: oqmd:oqmd-18906
paper: paper:10.1007/s11669-009-9579-x:Ta3Si, paper:10.1016/0364-5916(89)90007-2:SiTa3, paper:10.1016/j.jallcom.2012.09.148:SiTa3
tdb: tdb:SiTa-03Che-LB.tdb:SITA3, tdb:SiTa-09Guo.tdb:SITA3, tdb:SiTa-13Dro.tdb:SITA3, tdb:SiTa-89Vah.tdb:SITA3

TDB models of SITA3 (4): PHASE and CONSTITUENT statements as written

SiTa-03Che-LB.tdb: SITA3, type code %, sha256 9af74fc82b4f21c6…

64: PHASE SITA3 % 2 1 3 !
65: CONST SITA3 : SI : TA : !

SiTa-09Guo.tdb: SITA3, type code %, sha256 c62d1268ef582662…

67: PHASE SITA3 % 2 1 3 !
68: CONST SITA3 : SI : TA : !

SiTa-13Dro.tdb: SITA3, type code %, sha256 ea6e244374f26848…

76: PHASE SITA3 % 2 1 3 !
77: CONST SITA3 : SI : TA : !

SiTa-89Vah.tdb: SITA3, type code %, sha256 e0c04ce292c0b067…

70: PHASE SITA3 % 2 1 3 !
71: CONST SITA3 : SI : TA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2012.09.148 I. Drouelle, C. Servant, Thermodynamic assessment of the Si–Ta system, Journal of Alloys and Compounds 551, 293-299 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-009-9579-x Zhongnan Guo, Wenxia Yuan, Yu Sun, Zhoufei Cai, Zhiyu Qiao, Thermodynamic Assessment of the Si-Ta and Si-W Systems, J. Phase Equilib. Diffus. 30, 564-570 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(89)90007-2 C. Vahlas, P.Y. Chevalier, E. Blanquet, A thermodynamic evaluation of four Si-M (M = Mo, Ta, Ti, W) binary systems, Calphad 13, 273-292 (1989).
assessment that models this phase; reports 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). doi: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). doi: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.

@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}
}