Ru–Si phases

10 phases (tier A 5, tier C 1, liquid 1, needs_review 2, unresolved_no_candidates 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 · Ru–Si system page · Markdown · field reference

Phases of the Ru–Si system (10)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:ru-si:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–3999.61 K, x(Si) 0.98397–1	7	4
BCC_A2 phase:ru-si:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 4 calculated diagram(s)	0	4
FCC_A1 phase:ru-si: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:ru-si:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–2627.41 K, x(Si) 0–0.05336	15	4
LIQUID phase:ru-si:liquid	liquid	liquid	stable in 4 of 4 calculated diagram(s): 1561.64–4000 K, x(Si) 0–1	50	4
RU2SI_C37 phase:ru-si:ru2si-c37	Co2Si · C37 · oP12 · Pnma (62)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 1506.67–1822.42 K, x(Si) 0.33333–0.33333	21	4
RU2SI3 phase:ru-si:ru2si3		needs_review	stable in 4 of 4 calculated diagram(s): 300–1985.87 K, x(Si) 0.6–0.6	32	4
RU4SI3 phase:ru-si:ru4si3	Ru4Si3 · oP28 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 4 of 4 calculated diagram(s): 300–1948.13 K, x(Si) 0.42857–0.42857	26	4
RU5SI3 phase:ru-si:ru5si3		unresolved_no_candidates	stable in 1 of 1 calculated diagram(s): 1603.09–1822.74 K, x(Si) 0.375–0.375	0	1
RUSI phase:ru-si:rusi		needs_review	stable in 4 of 4 calculated diagram(s): 300–2103.4 K, x(Si) 0.5–0.5	41	4

DIAMOND_A4 (Ru–Si)

Id: phase:ru-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
Stability: stable in 4 of 4 calculated diagram(s): 300–3999.61 K, x(Si) 0.98397–1
Literature: 7 values (7 accepted) from 2 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:ru-si:a4-diamond, corpus:phase:ru-si:diamond-a4
paper: paper:10.1016/j.jallcom.2009.01.079:Diamond (Si), paper:10.1016/s0925-8388(01)00931-8:Diamond
tdb: tdb:RuSi-01Du-LB.tdb:DIAMOND_A4, tdb:RuSi-01Liu.tdb:DIAMOND_A4, tdb:RuSi-09Lon.tdb:DIAMOND_A4, tdb:RuSi-95Che.tdb:DIAMOND_A4

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

RuSi-01Du-LB.tdb: DIAMOND_A4, type code %, sha256 52402724aa676957…

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

RuSi-01Liu.tdb: DIAMOND_A4, type code %, sha256 a229255af0c2e5ae…

46: PHASE DIAMOND_A4 % 1 1 !
47: CONST DIAMOND_A4 : SI : !

RuSi-09Lon.tdb: DIAMOND_A4, type code %, sha256 6b726c2f0814471a…

47: PHASE DIAMOND_A4 % 1 1 !
48: CONST DIAMOND_A4 : SI : !

RuSi-95Che.tdb: DIAMOND_A4, type code %, sha256 fac3db235d64c253…

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

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2009.01.079 Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/S0925-8388(01)00931-8 Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.3139/ijmr-2001-0064 Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001).
assessment that models this phase
doi:10.1016/s0925-8388(98)00911-6 L. Perring, F. Bussy, J.C. Gachon, P. Feschotte, The Ruthenium–Silicon system, Journal of Alloys and Compounds 284, 198-205 (1999).
cited as the source of values for this phase

BCC_A2 (Ru–Si)

Id: phase:ru-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: not stable in 4 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ru-si:bcc-a2
tdb: tdb:RuSi-01Du-LB.tdb:BCC_A2, tdb:RuSi-01Liu.tdb:BCC_A2, tdb:RuSi-09Lon.tdb:BCC_A2, tdb:RuSi-95Che.tdb:BCC_A2

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

RuSi-01Du-LB.tdb: BCC_A2, type code %B, sha256 52402724aa676957…

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

RuSi-01Liu.tdb: BCC_A2, type code %B, sha256 a229255af0c2e5ae…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : RU SI : VA : !

RuSi-09Lon.tdb: BCC_A2, type code %B, sha256 6b726c2f0814471a…

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

RuSi-95Che.tdb: BCC_A2, type code %B, sha256 fac3db235d64c253…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.01.079 Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009).
assessment that models this phase
doi:10.1016/S0925-8388(01)00931-8 Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001).
assessment that models this phase
doi:10.3139/ijmr-2001-0064 Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001).
assessment that models this phase

FCC_A1 (Ru–Si)

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

Names (5): corpus: corpus:phase:ru-si:fcc-a1
tdb: tdb:RuSi-01Du-LB.tdb:FCC_A1, tdb:RuSi-01Liu.tdb:FCC_A1, tdb:RuSi-09Lon.tdb:FCC_A1, tdb:RuSi-95Che.tdb:FCC_A1

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

RuSi-01Du-LB.tdb: FCC_A1, type code %A, sha256 52402724aa676957…

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

RuSi-01Liu.tdb: FCC_A1, type code %A, sha256 a229255af0c2e5ae…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : RU SI : VA : !

RuSi-09Lon.tdb: FCC_A1, type code %A, sha256 6b726c2f0814471a…

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

RuSi-95Che.tdb: FCC_A1, type code %A, sha256 fac3db235d64c253…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.01.079 Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009).
assessment that models this phase
doi:10.1016/S0925-8388(01)00931-8 Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001).
assessment that models this phase
doi:10.3139/ijmr-2001-0064 Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001).
assessment that models this phase

HCP_A3 (Ru–Si)

Id: phase:ru-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 4 of 4 calculated diagram(s): 300–2627.41 K, x(Si) 0–0.05336
Literature: 15 values (15 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ru-si:hcp-a3
paper: paper:10.1016/j.jallcom.2009.01.079:Hcp (Ru), paper:10.1016/s0925-8388(01)00931-8:(Ru)
tdb: tdb:RuSi-01Du-LB.tdb:HCP_A3, tdb:RuSi-01Liu.tdb:HCP_A3, tdb:RuSi-09Lon.tdb:HCP_A3, tdb:RuSi-95Che.tdb:HCP_A3

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

RuSi-01Du-LB.tdb: HCP_A3, type code %, sha256 52402724aa676957…

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

RuSi-01Liu.tdb: HCP_A3, type code %, sha256 a229255af0c2e5ae…

41: PHASE HCP_A3 % 2 1 0.5 !
42: CONST HCP_A3 : RU% SI : VA : !

RuSi-09Lon.tdb: HCP_A3, type code %, sha256 6b726c2f0814471a…

42: PHASE HCP_A3 % 2 1 0.5 !
43: CONST HCP_A3 : RU% SI : VA : !

RuSi-95Che.tdb: HCP_A3, type code %, sha256 fac3db235d64c253…

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

Example references (4 of 4; assessments first):

doi:10.1016/S0925-8388(01)00931-8 Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2009.01.079 Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2001-0064 Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001).
assessment that models this phase
doi:10.1016/s0925-8388(98)00911-6 L. Perring, F. Bussy, J.C. Gachon, P. Feschotte, The Ruthenium–Silicon system, Journal of Alloys and Compounds 284, 198-205 (1999).
cited as the source of values for this phase

LIQUID (Ru–Si)

Id: phase:ru-si:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 4 of 4 calculated diagram(s): 1561.64–4000 K, x(Si) 0–1
Literature: 50 values (50 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ru-si:liquid
paper: paper:10.1016/j.jallcom.2009.01.079:L, paper:10.1016/s0925-8388(01)00931-8:liquid
tdb: tdb:RuSi-01Du-LB.tdb:LIQUID, tdb:RuSi-01Liu.tdb:LIQUID, tdb:RuSi-09Lon.tdb:LIQUID, tdb:RuSi-95Che.tdb:LIQUID

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

RuSi-01Du-LB.tdb: LIQUID, type code %, sha256 52402724aa676957…

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

RuSi-01Liu.tdb: LIQUID, type code %, sha256 a229255af0c2e5ae…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : RU SI : !

RuSi-09Lon.tdb: LIQUID, type code %, sha256 6b726c2f0814471a…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : RU SI : !

RuSi-95Che.tdb: LIQUID, type code %, sha256 fac3db235d64c253…

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

Example references (4 of 4; assessments first):

doi:10.1016/S0925-8388(01)00931-8 Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2009.01.079 Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2001-0064 Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001).
assessment that models this phase
doi:10.1016/s0925-8388(98)00911-6 L. Perring, F. Bussy, J.C. Gachon, P. Feschotte, The Ruthenium–Silicon system, Journal of Alloys and Compounds 284, 198-205 (1999).
cited as the source of values for this phase

RU2SI_C37 (Ru–Si)

Id: phase:ru-si:ru2si-c37; status assigned
Structure: Co2Si · C37 · oP12 · Pnma (62); type st:c37-co2si-op12; tier A: standard phase name; confidence high
Stoichiometry: Ru 0.6667, Si 0.3333
Stability: stable in 4 of 4 calculated diagram(s): 1506.67–1822.42 K, x(Si) 0.33333–0.33333
Literature: 21 values (21 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ru-si:ru2si-c37
paper: paper:10.1016/j.jallcom.2009.01.079:Ru2Si, paper:10.1016/s0925-8388(01)00931-8:Ru2Si
tdb: tdb:RuSi-01Du-LB.tdb:RU2SI_C37, tdb:RuSi-01Liu.tdb:RU2SI_C37, tdb:RuSi-09Lon.tdb:RU2SI_C37, tdb:RuSi-95Che.tdb:RU2SI_C37

TDB models of RU2SI_C37 (4): PHASE and CONSTITUENT statements as written

RuSi-01Du-LB.tdb: RU2SI_C37, type code %, sha256 52402724aa676957…

48: PHASE RU2SI_C37 % 2 2 1 !
49: CONST RU2SI_C37 : RU : SI : !

RuSi-01Liu.tdb: RU2SI_C37, type code %, sha256 a229255af0c2e5ae…

51: PHASE RU2SI_C37 % 2 2 1 !
52: CONST RU2SI_C37 : RU : SI : !

RuSi-09Lon.tdb: RU2SI_C37, type code %, sha256 6b726c2f0814471a…

52: PHASE RU2SI_C37 % 2 2 1 !
53: CONST RU2SI_C37 : RU : SI : !

RuSi-95Che.tdb: RU2SI_C37, type code %, sha256 fac3db235d64c253…

54: PHASE RU2SI_C37 % 2 2 1 !
55: CONST RU2SI_C37 : RU : SI : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2009.01.079 Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/S0925-8388(01)00931-8 Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.3139/ijmr-2001-0064 Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001).
assessment that models this phase
doi:10.1016/s0925-8388(98)00911-6 L. Perring, F. Bussy, J.C. Gachon, P. Feschotte, The Ruthenium–Silicon system, Journal of Alloys and Compounds 284, 198-205 (1999).
cited as the source of values for this phase

RU2SI3 (Ru–Si)

Id: phase:ru-si:ru2si3; status needs_review
No structure assigned. Why: no_structure_token; sgte_mmc2_row_disagrees_with_dft; sgte_mmc2_rows_disagree
Candidate (dft_mp): Pbcn (60) — on-hull MP Si3Ru2 at x(SI)=0.6000
Candidate (dft_oqmd): Pbcn (60) — on-hull OQMD Ru2 Si3 at x(SI)=0.6000
Candidate (sgte_mmc2): Ge3Ru2 · oP40 · Pbcn (60) — Hallstedt 2025 mmc2 row for RU2SI3: alpha-Ru2Si3 (see also Ru2Si3)
Candidate (sgte_mmc2): (Ru2Si3) · tI80 · P-4c2 (116) — Hallstedt 2025 mmc2 row for RU2SI3: beta-Ru2Si3 (see also Ge3Ru2)
Candidate (tdb_comment): Ge3Ru2 · oP40 · Pbcn — RuSi-01Du-LB.tdb: 'Prototype Ge3Ru2 (oP40, Pbcn), alpha-Ru2Si3'
Candidate (tdb_comment): Ge3Ru2 · oP40 · Pbcn — RuSi-01Liu.tdb: 'Prototype Ge3Ru2 (oP40, Pbcn), alpha-Ru2Si3'
Candidate (tdb_comment): Ge3Ru2 · oP40 · Pbcn — RuSi-09Lon.tdb: 'Prototype Ge3Ru2 (oP40, Pbcn), alpha-Ru2Si3'
Candidate (tdb_comment): Ge3Ru2 · oP40 · Pbcn — RuSi-95Che.tdb: 'Prototype Ge3Ru2 (oP40, Pbcn), alpha-Ru2Si3'
Stoichiometry: Ru 0.4000, Si 0.6000
Stability: stable in 4 of 4 calculated diagram(s): 300–1985.87 K, x(Si) 0.6–0.6
Literature: 32 values (32 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ru-si:ru2si3
paper: paper:10.1016/j.jallcom.2009.01.079:Ru2Si3, paper:10.1016/s0925-8388(01)00931-8:Ru2Si3
tdb: tdb:RuSi-01Du-LB.tdb:RU2SI3, tdb:RuSi-01Liu.tdb:RU2SI3, tdb:RuSi-09Lon.tdb:RU2SI3, tdb:RuSi-95Che.tdb:RU2SI3

TDB models of RU2SI3 (4): PHASE and CONSTITUENT statements as written

RuSi-01Du-LB.tdb: RU2SI3, type code %, sha256 52402724aa676957…

65: PHASE RU2SI3 % 2 2 3 !
66: CONST RU2SI3 : RU : SI : !

RuSi-01Liu.tdb: RU2SI3, type code %, sha256 a229255af0c2e5ae…

68: PHASE RU2SI3 % 2 2 3 !
69: CONST RU2SI3 : RU : SI : !

RuSi-09Lon.tdb: RU2SI3, type code %, sha256 6b726c2f0814471a…

69: PHASE RU2SI3 % 2 2 3 !
70: CONST RU2SI3 : RU : SI : !

RuSi-95Che.tdb: RU2SI3, type code %, sha256 fac3db235d64c253…

76: PHASE RU2SI3 % 2 2 3 !
77: CONST RU2SI3 : RU : SI : !

Example references (9 of 9; assessments first):

doi:10.1016/S0925-8388(01)00931-8 Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2009.01.079 Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2001-0064 Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001).
assessment that models this phase
doi:10.1016/s0925-8388(98)00911-6 L. Perring, F. Bussy, J.C. Gachon, P. Feschotte, The Ruthenium–Silicon system, Journal of Alloys and Compounds 284, 198-205 (1999).
cited as the source of values for this phase
doi:10.1016/s0040-6031(97)00041-5 L. Perring, P. Feschotte, J.C. Gachon, Enthalpies of formation of RuSi and RuSn compounds by direct reaction calorimetry, Thermochimica Acta 293, 101-108 (1997).
cited as the source of values for this phase
doi:10.1002/bbpc.19981020925 L. Perring, F. Bussy, J. J. Kuntz, J. C. Gachon, IV. Progress in experimental methods: Thermodynamic investigations in the Si‐Ge‐rich part of the ruthenium‐silicon‐germanium system, Ber Bunsenges Phys Chem 102, 1211-1216 (1998).
cited as the source of values for this phase
doi:10.1006/jssc.1997.7508 J.J. Kuntz, L. Perring, P. Feschotte, J.C. Gachon, Heat Capacity and Heat Content Measurements on Binary Compounds in the Ru–Si, Ru–Ge, and Ru–Sn Systems, Journal of Solid State Chemistry 133, 439-444 (1997).
cited as the source of values for this phase
doi:10.1016/s0925-8388(98)00504-0 S.V. Meschel, O.J. Kleppa, Standard enthalpies of formation of some 4d transition metal silicides by high temperature direct synthesis calorimetry, Journal of Alloys and Compounds 274, 193-200 (1998).
cited as the source of values for this phase
doi:10.1063/1.331319 C. S. Petersson, J. E. E. Baglin, J. J. Dempsey, F. M. d’Heurle, S. J. La Placa, Silicides of ruthenium and osmium: Thin film reactions, diffusion, nucleation, and stability, Journal of Applied Physics 53, 4866-4883 (1982).
cited as the source of values for this phase

RU4SI3 (Ru–Si)

Id: phase:ru-si:ru4si3; status assigned
Structure: Ru4Si3 · oP28 · Pnma (62); type st:ru4si3-op28; 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
Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ru 0.5714, Si 0.4286
Stability: stable in 4 of 4 calculated diagram(s): 300–1948.13 K, x(Si) 0.42857–0.42857
Literature: 26 values (26 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ru-si:ru4si3
paper: paper:10.1016/j.jallcom.2009.01.079:Ru4Si3, paper:10.1016/s0925-8388(01)00931-8:Ru4Si3
tdb: tdb:RuSi-01Du-LB.tdb:RU4SI3, tdb:RuSi-01Liu.tdb:RU4SI3, tdb:RuSi-09Lon.tdb:RU4SI3, tdb:RuSi-95Che.tdb:RU4SI3

TDB models of RU4SI3 (4): PHASE and CONSTITUENT statements as written

RuSi-01Du-LB.tdb: RU4SI3, type code %, sha256 52402724aa676957…

53: PHASE RU4SI3 % 2 4 3 !
54: CONST RU4SI3 : RU : SI : !

RuSi-01Liu.tdb: RU4SI3, type code %, sha256 a229255af0c2e5ae…

56: PHASE RU4SI3 % 2 4 3 !
57: CONST RU4SI3 : RU : SI : !

RuSi-09Lon.tdb: RU4SI3, type code %, sha256 6b726c2f0814471a…

57: PHASE RU4SI3 % 2 4 3 !
58: CONST RU4SI3 : RU : SI : !

RuSi-95Che.tdb: RU4SI3, type code %, sha256 fac3db235d64c253…

64: PHASE RU4SI3 % 2 4 3 !
65: CONST RU4SI3 : RU : SI : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2009.01.079 Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/S0925-8388(01)00931-8 Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.3139/ijmr-2001-0064 Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001).
assessment that models this phase
doi:10.1016/s0925-8388(98)00911-6 L. Perring, F. Bussy, J.C. Gachon, P. Feschotte, The Ruthenium–Silicon system, Journal of Alloys and Compounds 284, 198-205 (1999).
cited as the source of values for this phase
doi:10.1016/s0040-6031(97)00041-5 L. Perring, P. Feschotte, J.C. Gachon, Enthalpies of formation of RuSi and RuSn compounds by direct reaction calorimetry, Thermochimica Acta 293, 101-108 (1997).
cited as the source of values for this phase

RU5SI3 (Ru–Si)

Id: phase:ru-si:ru5si3; status unresolved_no_candidates
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token
Stoichiometry: Ru 0.6250, Si 0.3750
Stability: stable in 1 of 1 calculated diagram(s): 1603.09–1822.74 K, x(Si) 0.375–0.375
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ru-si:ru5si3
tdb: tdb:RuSi-95Che.tdb:RU5SI3

TDB models of RU5SI3 (1): PHASE and CONSTITUENT statements as written

RuSi-95Che.tdb: RU5SI3, type code %, sha256 fac3db235d64c253…

59: PHASE RU5SI3 % 2 5 3 !
60: CONST RU5SI3 : RU : SI : !

RUSI (Ru–Si)

Id: phase:ru-si:rusi; status needs_review
No structure assigned. Why: dft_space_group_198_matches_2_structure_types; no_structure_token; sgte_mmc2_row_disagrees_with_dft; sgte_mmc2_rows_disagree
Candidate (dft_mp): P2_13 (198) — on-hull MP SiRu at x(SI)=0.5000
Candidate (dft_oqmd): P213 (198) — on-hull OQMD Ru1 Si1 at x(SI)=0.5000
Candidate (dft_space_group_and_stoichiometry): FeSi · B20 · cP8 · P2_13 (198) — space group 198 and stoichiometry match
Candidate (dft_space_group_and_stoichiometry): alpha-CO · B21 · cP8 · P2_13 (198) — space group 198 and stoichiometry match
Candidate (sgte_mmc2): CsCl · B2 · cP2 · Pm-3m (221) — Hallstedt 2025 mmc2 row for RUSI: beta-RuSi (see also FeSi)
Candidate (sgte_mmc2): FeSi · B20 · cP8 · P2_13 (198) — Hallstedt 2025 mmc2 row for RUSI: alpha-RuSi (see also CsCl)
Candidate (tdb_comment): FeSi · cP8 · P2_13, B20 — RuSi-01Du-LB.tdb: 'Prototype FeSi (cP8, P2_13, B20), alpha-RuSi'
Candidate (tdb_comment): FeSi · cP8 · P2_13, B20 — RuSi-01Liu.tdb: 'Prototype FeSi (cP8, P2_13, B20), alpha-RuSi'
Stoichiometry: Ru 0.5000, Si 0.5000
Stability: stable in 4 of 4 calculated diagram(s): 300–2103.4 K, x(Si) 0.5–0.5
Literature: 41 values (41 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ru-si:rusi
paper: paper:10.1016/j.jallcom.2009.01.079:RuSi, paper:10.1016/s0925-8388(01)00931-8:RuSi
tdb: tdb:RuSi-01Du-LB.tdb:RUSI, tdb:RuSi-01Liu.tdb:RUSI, tdb:RuSi-09Lon.tdb:RUSI, tdb:RuSi-95Che.tdb:RUSI

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

RuSi-01Du-LB.tdb: RUSI, type code %, sha256 52402724aa676957…

59: PHASE RUSI % 2 1 1 !
60: CONST RUSI : RU : SI : !

RuSi-01Liu.tdb: RUSI, type code %, sha256 a229255af0c2e5ae…

62: PHASE RUSI % 2 1 1 !
63: CONST RUSI : RU : SI : !

RuSi-09Lon.tdb: RUSI, type code %, sha256 6b726c2f0814471a…

63: PHASE RUSI % 2 1 1 !
64: CONST RUSI : RU : SI : !

RuSi-95Che.tdb: RUSI, type code %, sha256 fac3db235d64c253…

70: PHASE RUSI % 2 1 1 !
71: CONST RUSI : RU : SI : !

Example references (10 of 10; assessments first):

doi:10.1016/S0925-8388(01)00931-8 Y.Q. Liu, G. Shao, K.P. Homewood, J. Alloys Compd., 320, 72-79(2001).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2009.01.079 Z.H. Long, H.S. Liu, Z.P. Jin, Thermodynamic description of Ru–Ge–Si ternary system, Journal of Alloys and Compounds 479, 262-267 (2009).
assessment that models this phase; reports values for this phase
doi:10.3139/ijmr-2001-0064 Y. Du, K.H. Chen, J.C. Schuster, L. Perring, B.Y. Huang, Z.H. Yuan, J.C. Gachon, Z. Metallkd., 92, 323-27(2001).
assessment that models this phase
doi:10.1016/s0925-8388(98)00911-6 L. Perring, F. Bussy, J.C. Gachon, P. Feschotte, The Ruthenium–Silicon system, Journal of Alloys and Compounds 284, 198-205 (1999).
cited as the source of values for this phase
doi:10.1016/s0040-6031(97)00041-5 L. Perring, P. Feschotte, J.C. Gachon, Enthalpies of formation of RuSi and RuSn compounds by direct reaction calorimetry, Thermochimica Acta 293, 101-108 (1997).
cited as the source of values for this phase
doi:10.1016/s0925-8388(98)00504-0 S.V. Meschel, O.J. Kleppa, Standard enthalpies of formation of some 4d transition metal silicides by high temperature direct synthesis calorimetry, Journal of Alloys and Compounds 274, 193-200 (1998).
cited as the source of values for this phase
doi:10.1006/jssc.1997.7508 J.J. Kuntz, L. Perring, P. Feschotte, J.C. Gachon, Heat Capacity and Heat Content Measurements on Binary Compounds in the Ru–Si, Ru–Ge, and Ru–Sn Systems, Journal of Solid State Chemistry 133, 439-444 (1997).
cited as the source of values for this phase
doi:10.1016/0038-1101(78)90335-0 R. Pretorius, J.M. Harris, M-A. Nicolet, Reaction of thin metal films with SiO2 substrates, Solid-State Electronics 21, 667-675 (1978).
cited as the source of values for this phase
doi:10.1016/0364-5916(81)90013-4 E.S. Machlin, Calphad 5 (1981) 1.
cited as the source of values for this phase
doi:10.1063/1.331319 C. S. Petersson, J. E. E. Baglin, J. J. Dempsey, F. M. d’Heurle, S. J. La Placa, Silicides of ruthenium and osmium: Thin film reactions, diffusion, nucleation, and stability, Journal of Applied Physics 53, 4866-4883 (1982).
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). 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}
}