Si–Y phases

12 phases (tier A 8, tier C 2, liquid 1, needs_review 1); 11 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–Y system page · Markdown · field reference

Phases of the Si–Y system (12)
Phase	Structure	Basis	Stability (calculated)	TDB models
DIAMOND_A4 phase:si-y:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1707.23 K, x(Y) 0–0	4
BCC_A2 phase:si-y:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 526.15–2499.9 K, x(Y) 1–1	4
FCC_A1 phase:si-y:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 4 calculated diagram(s)	4
HCP_A3 phase:si-y:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1751.15 K, x(Y) 1–1	4
LIQUID phase:si-y:liquid	liquid	liquid	stable in 4 of 4 calculated diagram(s): 1478.48–2500 K, x(Y) 0–1	4
SI2Y_C32 phase:si-y:si2y-c32	AlB2 · C32 · hP3 · P6/mmm (191)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1527.15 K, x(Y) 0.32822–0.33953	4
SI2Y_CC phase:si-y:si2y-cc	Si2Th · C_c · tI12 · I4_1/amd (141)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 1523–1795.92 K, x(Y) 0.33002–0.34515	4
SI3Y5_D88 phase:si-y:si3y5-d88	Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–2146.03 K, x(Y) 0.625–0.63731	4
SI4Y5 phase:si-y:si4y5	Gd5Si4 · oP36 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 4 of 4 calculated diagram(s): 300–2144.02 K, x(Y) 0.55556–0.55556	4
SI5Y3_RT phase:si-y:si5y3	GdSi1.4 · oI12 · Imma (74)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 4 of 4 calculated diagram(s): 300–723.55 K, x(Y) 0.375–0.375	4
SI5Y3_C32 phase:si-y:si5y3-c32		needs_review	stable in 4 of 4 calculated diagram(s): 723–1915.13 K, x(Y) 0.375–0.375	4
SIY_B33 phase:si-y:siy-b33	CrB · B33 · oC8 · Cmcm (63)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–2111.17 K, x(Y) 0.5–0.5	4

DIAMOND_A4 (Si–Y)

Id: phase:si-y: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): 300–1707.23 K, x(Y) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:a4-diamond
tdb: tdb:SiY-04Luk-LB.tdb:DIAMOND_A4, tdb:SiY-19Xu.tdb:DIAMOND_A4, tdb:SiY-19Zha.tdb:DIAMOND_A4, tdb:SiY-98Luk.tdb:DIAMOND_A4

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

SiY-04Luk-LB.tdb: DIAMOND_A4, type code %, sha256 409dae6616db4eca…

57: PHASE DIAMOND_A4 % 1 1 !
58: CONST DIAMOND_A4 : SI : !

SiY-19Xu.tdb: DIAMOND_A4, type code %, sha256 502ed24fae9e21aa…

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

SiY-19Zha.tdb: DIAMOND_A4, type code %, sha256 228f328ec4446fa3…

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

SiY-98Luk.tdb: DIAMOND_A4, type code %, sha256 bae0ca1237ae17fe…

54: PHASE DIAMOND_A4 % 1 1 !
55: CONST DIAMOND_A4 : SI : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

BCC_A2 (Si–Y)

Id: phase:si-y: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): 526.15–2499.9 K, x(Y) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:bcc-a2
tdb: tdb:SiY-04Luk-LB.tdb:BCC_A2, tdb:SiY-19Xu.tdb:BCC_A2, tdb:SiY-19Zha.tdb:BCC_A2, tdb:SiY-98Luk.tdb:BCC_A2

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

SiY-04Luk-LB.tdb: BCC_A2, type code %B, sha256 409dae6616db4eca…

47: PHASE BCC_A2 %B 2 1 3 !
48: CONST BCC_A2 : SI Y% : VA : !

SiY-19Xu.tdb: BCC_A2, type code %B, sha256 502ed24fae9e21aa…

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

SiY-19Zha.tdb: BCC_A2, type code %B, sha256 228f328ec4446fa3…

38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : SI Y% : VA : !

SiY-98Luk.tdb: BCC_A2, type code %B, sha256 bae0ca1237ae17fe…

44: PHASE BCC_A2 %B 2 1 3 !
45: CONST BCC_A2 : SI Y% : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

FCC_A1 (Si–Y)

Id: phase:si-y: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-y:fcc-a1
tdb: tdb:SiY-04Luk-LB.tdb:FCC_A1, tdb:SiY-19Xu.tdb:FCC_A1, tdb:SiY-19Zha.tdb:FCC_A1, tdb:SiY-98Luk.tdb:FCC_A1

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

SiY-04Luk-LB.tdb: FCC_A1, type code %A, sha256 409dae6616db4eca…

42: PHASE FCC_A1 %A 2 1 1 !
43: CONST FCC_A1 : SI Y : VA : !

SiY-19Xu.tdb: FCC_A1, type code %A, sha256 502ed24fae9e21aa…

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

SiY-19Zha.tdb: FCC_A1, type code %A, sha256 228f328ec4446fa3…

33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : SI Y : VA : !

SiY-98Luk.tdb: FCC_A1, type code %A, sha256 bae0ca1237ae17fe…

39: PHASE FCC_A1 %A 2 1 1 !
40: CONST FCC_A1 : SI Y : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

HCP_A3 (Si–Y)

Id: phase:si-y: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): 300–1751.15 K, x(Y) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:hcp-a3
tdb: tdb:SiY-04Luk-LB.tdb:HCP_A3, tdb:SiY-19Xu.tdb:HCP_A3, tdb:SiY-19Zha.tdb:HCP_A3, tdb:SiY-98Luk.tdb:HCP_A3

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

SiY-04Luk-LB.tdb: HCP_A3, type code %A, sha256 409dae6616db4eca…

52: PHASE HCP_A3 %A 2 1 0.5 !
53: CONST HCP_A3 : SI Y% : VA : !

SiY-19Xu.tdb: HCP_A3, type code %A, sha256 502ed24fae9e21aa…

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

SiY-19Zha.tdb: HCP_A3, type code %A, sha256 228f328ec4446fa3…

43: PHASE HCP_A3 %A 2 1 0.5 !
44: CONST HCP_A3 : SI Y% : VA : !

SiY-98Luk.tdb: HCP_A3, type code %A, sha256 bae0ca1237ae17fe…

49: PHASE HCP_A3 %A 2 1 0.5 !
50: CONST HCP_A3 : SI Y% : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

LIQUID (Si–Y)

Id: phase:si-y:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 4 of 4 calculated diagram(s): 1478.48–2500 K, x(Y) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:liquid
tdb: tdb:SiY-04Luk-LB.tdb:LIQUID, tdb:SiY-19Xu.tdb:LIQUID, tdb:SiY-19Zha.tdb:LIQUID, tdb:SiY-98Luk.tdb:LIQUID

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

SiY-04Luk-LB.tdb: LIQUID, type code %, sha256 409dae6616db4eca…

37: PHASE LIQUID:L % 1 1 !
38: CONST LIQUID:L : SI Y : !

SiY-19Xu.tdb: LIQUID, type code %, sha256 502ed24fae9e21aa…

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

SiY-19Zha.tdb: LIQUID, type code %, sha256 228f328ec4446fa3…

28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : SI Y : !

SiY-98Luk.tdb: LIQUID, type code %, sha256 bae0ca1237ae17fe…

34: PHASE LIQUID:L % 1 1 !
35: CONST LIQUID:L : SI Y : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

SI2Y_C32 (Si–Y)

Id: phase:si-y:si2y-c32; status assigned
Structure: AlB2 · C32 · hP3 · P6/mmm (191); type st:c32-alb2-hp3; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in SiY-19Zha.tdb also describes the disordered state
Stability: stable in 4 of 4 calculated diagram(s): 300–1527.15 K, x(Y) 0.32822–0.33953
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:si2y-c32
tdb: tdb:SiY-04Luk-LB.tdb:SI2Y_C32, tdb:SiY-19Xu.tdb:SI2Y_C32, tdb:SiY-19Zha.tdb:SI2Y_C32, tdb:SiY-98Luk.tdb:SI2Y_C32

TDB models of SI2Y_C32 (4): PHASE and CONSTITUENT statements as written

SiY-04Luk-LB.tdb: SI2Y_C32, type code %, sha256 409dae6616db4eca…

62: PHASE SI2Y_C32 % 2 2 1 !
63: CONST SI2Y_C32 : SI : Y : !

SiY-19Xu.tdb: SI2Y_C32, type code %, sha256 502ed24fae9e21aa…

52: PHASE SI2Y_C32 % 2 2 1 !
53: CONST SI2Y_C32 : SI : Y : !

SiY-19Zha.tdb: SI2Y_C32, type code %, sha256 228f328ec4446fa3…

53: PHASE SI2Y_C32 % 2 2 1 !
54: CONST SI2Y_C32 : SI% Y : SI Y% : !

SiY-98Luk.tdb: SI2Y_C32, type code %, sha256 bae0ca1237ae17fe…

59: PHASE SI2Y_C32 % 2 2 1 !
60: CONST SI2Y_C32 : SI : Y : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

SI2Y_CC (Si–Y)

Id: phase:si-y:si2y-cc; status assigned
Structure: Si2Th · C_c · tI12 · I4_1/amd (141); type st:c-c-si2th-ti12; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in SiY-19Zha.tdb also describes the disordered state
Stability: stable in 4 of 4 calculated diagram(s): 1523–1795.92 K, x(Y) 0.33002–0.34515
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:si2y-cc
tdb: tdb:SiY-04Luk-LB.tdb:SI2Y_CC, tdb:SiY-19Xu.tdb:SI2Y_CC, tdb:SiY-19Zha.tdb:SI2Y_CC, tdb:SiY-98Luk.tdb:SI2Y_CC

TDB models of SI2Y_CC (4): PHASE and CONSTITUENT statements as written

SiY-04Luk-LB.tdb: SI2Y_CC, type code %, sha256 409dae6616db4eca…

67: PHASE SI2Y_CC % 2 2 1 !
68: CONST SI2Y_CC : SI : Y : !

SiY-19Xu.tdb: SI2Y_CC, type code %, sha256 502ed24fae9e21aa…

57: PHASE SI2Y_CC % 2 2 1 !
58: CONST SI2Y_CC : SI : Y : !

SiY-19Zha.tdb: SI2Y_CC, type code %, sha256 228f328ec4446fa3…

58: PHASE SI2Y_CC % 2 2 1 !
59: CONST SI2Y_CC : SI% Y : SI Y% : !

SiY-98Luk.tdb: SI2Y_CC, type code %, sha256 bae0ca1237ae17fe…

64: PHASE SI2Y_CC % 2 2 1 !
65: CONST SI2Y_CC : SI : Y : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

SI3Y5_D88 (Si–Y)

Id: phase:si-y:si3y5-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
Stability: stable in 4 of 4 calculated diagram(s): 300–2146.03 K, x(Y) 0.625–0.63731
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:si3y5-d88
tdb: tdb:SiY-04Luk-LB.tdb:SI3Y5_D88, tdb:SiY-19Xu.tdb:SI3Y5_D88, tdb:SiY-19Zha.tdb:SI3Y5_D88, tdb:SiY-98Luk.tdb:SI3Y5_D88

TDB models of SI3Y5_D88 (4): PHASE and CONSTITUENT statements as written

SiY-04Luk-LB.tdb: SI3Y5_D88, type code %, sha256 409dae6616db4eca…

92: PHASE SI3Y5_D88 % 2 3 5 !
93: CONST SI3Y5_D88 : SI : Y : !

SiY-19Xu.tdb: SI3Y5_D88, type code %, sha256 502ed24fae9e21aa…

82: PHASE SI3Y5_D88 % 2 3 5 !
83: CONST SI3Y5_D88 : SI : Y : !

SiY-19Zha.tdb: SI3Y5_D88, type code %, sha256 228f328ec4446fa3…

83: PHASE SI3Y5_D88 % 2 3 5 !
84: CONST SI3Y5_D88 : SI% Y : Y : !

SiY-98Luk.tdb: SI3Y5_D88, type code %, sha256 bae0ca1237ae17fe…

89: PHASE SI3Y5_D88 % 2 3 5 !
90: CONST SI3Y5_D88 : SI : Y : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

SI4Y5 (Si–Y)

Id: phase:si-y:si4y5; status assigned
Structure: Gd5Si4 · oP36 · Pnma (62); type st:gd5si4-op36; 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: Si 0.4444, Y 0.5556
Stability: stable in 4 of 4 calculated diagram(s): 300–2144.02 K, x(Y) 0.55556–0.55556
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:si4y5
tdb: tdb:SiY-04Luk-LB.tdb:SI4Y5, tdb:SiY-19Xu.tdb:SI4Y5, tdb:SiY-19Zha.tdb:SI4Y5, tdb:SiY-98Luk.tdb:SI4Y5

TDB models of SI4Y5 (4): PHASE and CONSTITUENT statements as written

SiY-04Luk-LB.tdb: SI4Y5, type code %, sha256 409dae6616db4eca…

87: PHASE SI4Y5 % 2 4 5 !
88: CONST SI4Y5 : SI : Y : !

SiY-19Xu.tdb: SI4Y5, type code %, sha256 502ed24fae9e21aa…

77: PHASE SI4Y5 % 2 4 5 !
78: CONST SI4Y5 : SI : Y : !

SiY-19Zha.tdb: SI4Y5, type code %, sha256 228f328ec4446fa3…

78: PHASE SI4Y5 % 2 4 5 !
79: CONST SI4Y5 : SI : Y : !

SiY-98Luk.tdb: SI4Y5, type code %, sha256 bae0ca1237ae17fe…

84: PHASE SI4Y5 % 2 4 5 !
85: CONST SI4Y5 : SI : Y : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

SI5Y3_RT (Si–Y)

Id: phase:si-y:si5y3; status assigned
Structure: GdSi1.4 · oI12 · Imma (74); type st:gdsi1-4-oi12; 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_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Si 0.6250, Y 0.3750
Stability: stable in 4 of 4 calculated diagram(s): 300–723.55 K, x(Y) 0.375–0.375
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:si5y3
tdb: tdb:SiY-04Luk-LB.tdb:SI5Y3_RT, tdb:SiY-19Xu.tdb:SI5Y3_RT, tdb:SiY-19Zha.tdb:SI5Y3_RT, tdb:SiY-98Luk.tdb:SI5Y3_RT

TDB models of SI5Y3_RT (4): PHASE and CONSTITUENT statements as written

SiY-04Luk-LB.tdb: SI5Y3_RT, type code %, sha256 409dae6616db4eca…

72: PHASE SI5Y3_RT % 2 5 3 !
73: CONST SI5Y3_RT : SI : Y : !

SiY-19Xu.tdb: SI5Y3_RT, type code %, sha256 502ed24fae9e21aa…

62: PHASE SI5Y3_RT % 2 5 3 !
63: CONST SI5Y3_RT : SI : Y : !

SiY-19Zha.tdb: SI5Y3_RT, type code %, sha256 228f328ec4446fa3…

63: PHASE SI5Y3_RT % 2 5 3 !
64: CONST SI5Y3_RT : SI : Y : !

SiY-98Luk.tdb: SI5Y3_RT, type code %, sha256 bae0ca1237ae17fe…

69: PHASE SI5Y3_RT % 2 5 3 !
70: CONST SI5Y3_RT : SI : Y : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

SI5Y3_C32 (Si–Y)

Id: phase:si-y:si5y3-c32; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_C32; stoichiometry_contradicts_C32:SiY-04Luk-LB.tdb; stoichiometry_contradicts_C32:SiY-19Xu.tdb; stoichiometry_contradicts_C32:SiY-19Zha.tdb; stoichiometry_contradicts_C32:SiY-98Luk.tdb
Candidate (dft_oqmd): P-62c (190) — on-hull OQMD Si5 Y3 at x(Y)=0.3750
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 SI5Y3_C32: Si5Y3 (high T)
Candidate (tdb_comment): AlB2 · hP3 · P6/mmm — SiY-04Luk-LB.tdb: 'Prototype AlB2 (hP3, P6/mmm), high T'
Candidate (tdb_comment): AlB2 · hP3 · P6/mmm — SiY-19Xu.tdb: 'Prototype AlB2 (hP3, P6/mmm), high T'
Candidate (tdb_comment): AlB2 · hP3 · P6/mmm — SiY-19Zha.tdb: 'Prototype AlB2 (hP3, P6/mmm), high T'
Candidate (tdb_comment): AlB2 · hP3 · P6/mmm — SiY-98Luk.tdb: 'Prototype AlB2 (hP3, P6/mmm), high T'
Stoichiometry: Si 0.6250, Y 0.3750
Stability: stable in 4 of 4 calculated diagram(s): 723–1915.13 K, x(Y) 0.375–0.375
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:si5y3-c32
tdb: tdb:SiY-04Luk-LB.tdb:SI5Y3_C32, tdb:SiY-19Xu.tdb:SI5Y3_C32, tdb:SiY-19Zha.tdb:SI5Y3_C32, tdb:SiY-98Luk.tdb:SI5Y3_C32

TDB models of SI5Y3_C32 (4): PHASE and CONSTITUENT statements as written

SiY-04Luk-LB.tdb: SI5Y3_C32, type code %, sha256 409dae6616db4eca…

77: PHASE SI5Y3_C32 % 2 5 3 !
78: CONST SI5Y3_C32 : SI : Y : !

SiY-19Xu.tdb: SI5Y3_C32, type code %, sha256 502ed24fae9e21aa…

67: PHASE SI5Y3_C32 % 2 5 3 !
68: CONST SI5Y3_C32 : SI : Y : !

SiY-19Zha.tdb: SI5Y3_C32, type code %, sha256 228f328ec4446fa3…

68: PHASE SI5Y3_C32 % 2 5 3 !
69: CONST SI5Y3_C32 : SI : Y : !

SiY-98Luk.tdb: SI5Y3_C32, type code %, sha256 bae0ca1237ae17fe…

74: PHASE SI5Y3_C32 % 2 5 3 !
75: CONST SI5Y3_C32 : SI : Y : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models this phase

SIY_B33 (Si–Y)

Id: phase:si-y:siy-b33; status assigned
Structure: CrB · B33 · oC8 · Cmcm (63); type st:b33-crb-oc8; tier A: standard phase name; confidence high
Stoichiometry: Si 0.5000, Y 0.5000
Stability: stable in 4 of 4 calculated diagram(s): 300–2111.17 K, x(Y) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:si-y:siy-b33
tdb: tdb:SiY-04Luk-LB.tdb:SIY_B33, tdb:SiY-19Xu.tdb:SIY_B33, tdb:SiY-19Zha.tdb:SIY_B33, tdb:SiY-98Luk.tdb:SIY_B33

TDB models of SIY_B33 (4): PHASE and CONSTITUENT statements as written

SiY-04Luk-LB.tdb: SIY_B33, type code %, sha256 409dae6616db4eca…

82: PHASE SIY_B33 % 2 1 1 !
83: CONST SIY_B33 : SI : Y : !

SiY-19Xu.tdb: SIY_B33, type code %, sha256 502ed24fae9e21aa…

72: PHASE SIY_B33 % 2 1 1 !
73: CONST SIY_B33 : SI : Y : !

SiY-19Zha.tdb: SIY_B33, type code %, sha256 228f328ec4446fa3…

73: PHASE SIY_B33 % 2 1 1 !
74: CONST SIY_B33 : SI : Y : !

SiY-98Luk.tdb: SIY_B33, type code %, sha256 bae0ca1237ae17fe…

79: PHASE SIY_B33 % 2 1 1 !
80: CONST SIY_B33 : SI : Y : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2019.03.009 Z. Zhang, M.-Y. Chu, X.-S. Zhao, K. Li, S.-L. Shang, Z.-K. Liu, J.-Y. Shen, Calphad, 65, 282-90(2019).
assessment that models this phase
doi:10.1016/j.jeurceramsoc.2019.07.012 Kai Xu, Houke Zou, Keke Chang, Zixuan Deng, Xiaobing Zhou, Yeyan Huang et al., Thermodynamic description of the sintering aid system in silicon carbide ceramics with the addition of yttrium, Journal of the European Ceramic Society 39, 4510-4519 (2019).
assessment that models 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}
}