La–Si phases

13 phases (tier A 8, tier C 2, liquid 1, needs_review 2); 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 · full JSON · La–Si system page · Markdown · field reference

Phases of the La–Si system (13)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:la-si:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–2357.2 K, x(Si) 1–1	2	2
BCC_A2 phase:la-si:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1088.11–1190 K, x(Si) 0–0.01328	2	2
DHCP phase:la-si:dhcp-a3	alpha-La · A3' · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–823.85 K, x(Si) 0–0	1	2
FCC_A1 phase:la-si:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 539.53–1134 K, x(Si) 0–0.01005	5	2
HCP_A3 phase:la-si:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
LA3SI2_D5A phase:la-si:la3si2-d5a	Si2U3 · D5_a · tP10 · P4/mbm (127)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1743.16 K, x(Si) 0.4–0.4	4	2
LA3SI5 phase:la-si:la3si5	GdSi1.4 · oI12 · Imma (74)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–2002.6 K, x(Si) 0.625–0.625	0	1
LA5SI3_D8L phase:la-si:la5si3-d8l	Cr5B3 · D8_l · tI32 · I4/mcm (140)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1540.34 K, x(Si) 0.375–0.375	5	2
LA5SI4 phase:la-si:la5si4	Si4Zr5 · tP36 · P4_12_12 (92)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1833.91 K, x(Si) 0.44444–0.44444	11	2
LASI_B27 phase:la-si:lasi-b27		needs_review	stable in 2 of 2 calculated diagram(s): 300–1899.4 K, x(Si) 0.5–0.5	6	2
LASI2_CC phase:la-si:lasi2-cc	Si2Th · C_c · tI12 · I4_1/amd (141)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1872.04 K, x(Si) 0.66667–0.66667	0	2
LASI2_X phase:la-si:lasi2-x		needs_review	stable in 1 of 1 calculated diagram(s): 300–2000.18 K, x(Si) 0.64–0.64	0	1
LIQUID phase:la-si:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 995.22–2500 K, x(Si) 0–1	20	2

DIAMOND_A4 (La–Si)

Id: phase:la-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
Stoichiometry: Si 1.0000
Stability: stable in 2 of 2 calculated diagram(s): 300–2357.2 K, x(Si) 1–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-si:a4-diamond
paper: paper:10.1016/j.jallcom.2009.09.171:Diamond(Si)
tdb: tdb:LaSi-10Zho.tdb:DIAMOND_A4, tdb:LaSi-20Xu.tdb:DIAMOND_A4

TDB models of DIAMOND_A4 (2): PHASE and CONSTITUENT statements as written

LaSi-10Zho.tdb: DIAMOND_A4, type code %, sha256 40aef7ee33d576b9…

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

LaSi-20Xu.tdb: DIAMOND_A4, type code %, sha256 63d465a532cafc3b…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase; reports values for this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase
doi:10.1016/s0925-8388(01)01686-3 M.V. Bulanova, P.N. Zheltov, K.A. Meleshevich, P.A. Saltykov, G. Effenberg, J.-C. Tedenac, Lanthanum–silicon system, Journal of Alloys and Compounds 329, 214-223 (2001).
cited as the source of values for this phase

BCC_A2 (La–Si)

Id: phase:la-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: stable in 2 of 2 calculated diagram(s): 1088.11–1190 K, x(Si) 0–0.01328
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-si:bcc-a2
paper: paper:10.1016/j.jallcom.2009.09.171:BCC
tdb: tdb:LaSi-10Zho.tdb:BCC_A2, tdb:LaSi-20Xu.tdb:BCC_A2

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

LaSi-10Zho.tdb: BCC_A2, type code %B, sha256 40aef7ee33d576b9…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : LA% SI : VA : !

LaSi-20Xu.tdb: BCC_A2, type code %B, sha256 63d465a532cafc3b…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : LA% SI : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase; reports values for this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase
doi:10.1016/s0925-8388(01)01686-3 M.V. Bulanova, P.N. Zheltov, K.A. Meleshevich, P.A. Saltykov, G. Effenberg, J.-C. Tedenac, Lanthanum–silicon system, Journal of Alloys and Compounds 329, 214-223 (2001).
cited as the source of values for this phase

DHCP (La–Si)

Id: phase:la-si:dhcp-a3; status assigned
Structure: alpha-La · A3' · hP4 · P6_3/mmc (194); type st:a3-alpha-la-hp4; tier A: standard phase name; confidence high
Stoichiometry: La 1.0000
Stability: stable in 2 of 2 calculated diagram(s): 300–823.85 K, x(Si) 0–0
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-si:dhcp-a3
paper: paper:10.1016/j.jallcom.2009.09.171:DHCP
tdb: tdb:LaSi-10Zho.tdb:DHCP, tdb:LaSi-20Xu.tdb:DHCP

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

LaSi-10Zho.tdb: DHCP, type code %, sha256 40aef7ee33d576b9…

41: PHASE DHCP % 1 1 !
42: CONST DHCP : LA : !

LaSi-20Xu.tdb: DHCP, type code %, sha256 63d465a532cafc3b…

40: PHASE DHCP % 1 1 !
41: CONST DHCP : LA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase; reports values for this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase

FCC_A1 (La–Si)

Id: phase:la-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: stable in 2 of 2 calculated diagram(s): 539.53–1134 K, x(Si) 0–0.01005
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-si:fcc-a1
paper: paper:10.1016/j.jallcom.2009.09.171:FCC
tdb: tdb:LaSi-10Zho.tdb:FCC_A1, tdb:LaSi-20Xu.tdb:FCC_A1

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

LaSi-10Zho.tdb: FCC_A1, type code %A, sha256 40aef7ee33d576b9…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : LA% SI : VA : !

LaSi-20Xu.tdb: FCC_A1, type code %A, sha256 63d465a532cafc3b…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : LA% SI : VA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase; reports values for this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase
doi:10.1016/s0925-8388(01)01686-3 M.V. Bulanova, P.N. Zheltov, K.A. Meleshevich, P.A. Saltykov, G. Effenberg, J.-C. Tedenac, Lanthanum–silicon system, Journal of Alloys and Compounds 329, 214-223 (2001).
cited as the source of values for this phase

HCP_A3 (La–Si)

Id: phase:la-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
Stoichiometry: Si 1.0000
Stability: not stable in 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:la-si:hcp-a3
tdb: tdb:LaSi-10Zho.tdb:HCP_A3, tdb:LaSi-20Xu.tdb:HCP_A3

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

LaSi-10Zho.tdb: HCP_A3, type code %A, sha256 40aef7ee33d576b9…

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

LaSi-20Xu.tdb: HCP_A3, type code %A, sha256 63d465a532cafc3b…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : SI : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase

LA3SI2_D5A (La–Si)

Id: phase:la-si:la3si2-d5a; status assigned
Structure: Si2U3 · D5_a · tP10 · P4/mbm (127); type st:d5-a-si2u3-tp10; tier A: standard phase name; confidence high
Stoichiometry: La 0.6000, Si 0.4000
Stability: stable in 2 of 2 calculated diagram(s): 300–1743.16 K, x(Si) 0.4–0.4
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-si:la3si2-d5a
paper: paper:10.1016/j.jallcom.2009.09.171:La3Si2
tdb: tdb:LaSi-10Zho.tdb:LA3SI2_D5A, tdb:LaSi-20Xu.tdb:LA3SI2_D5A

TDB models of LA3SI2_D5A (2): PHASE and CONSTITUENT statements as written

LaSi-10Zho.tdb: LA3SI2_D5A, type code %, sha256 40aef7ee33d576b9…

56: PHASE LA3SI2_D5A % 2 3 2 !
57: CONST LA3SI2_D5A : LA : SI : !

LaSi-20Xu.tdb: LA3SI2_D5A, type code %, sha256 63d465a532cafc3b…

55: PHASE LA3SI2_D5A % 2 3 2 !
56: CONST LA3SI2_D5A : LA : SI : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase; reports values for this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase
doi:10.1016/s0925-8388(01)01686-3 M.V. Bulanova, P.N. Zheltov, K.A. Meleshevich, P.A. Saltykov, G. Effenberg, J.-C. Tedenac, Lanthanum–silicon system, Journal of Alloys and Compounds 329, 214-223 (2001).
cited as the source of values for this phase

LA3SI5 (La–Si)

Id: phase:la-si:la3si5; 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_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: La 0.3750, Si 0.6250
Stability: stable in 1 of 1 calculated diagram(s): 300–2002.6 K, x(Si) 0.625–0.625
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:la-si:la3si5
tdb: tdb:LaSi-20Xu.tdb:LA3SI5

TDB models of LA3SI5 (1): PHASE and CONSTITUENT statements as written

LaSi-20Xu.tdb: LA3SI5, type code %, sha256 63d465a532cafc3b…

70: PHASE LA3SI5 % 2 3 5 !
71: CONST LA3SI5 : LA : SI : !

Example references (1 of 1; assessments first):

doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase

LA5SI3_D8L (La–Si)

Id: phase:la-si:la5si3-d8l; status assigned
Structure: Cr5B3 · D8_l · tI32 · I4/mcm (140); type st:d8-l-cr5b3-ti32; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaaqfp and oqmd-16378, space group 140
Stoichiometry: La 0.6250, Si 0.3750
Stability: stable in 2 of 2 calculated diagram(s): 300–1540.34 K, x(Si) 0.375–0.375
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:la-si:la5si3-d8l
mp: mp:mp-aaaaaqfp
oqmd: oqmd:oqmd-16378
paper: paper:10.1016/j.jallcom.2009.09.171:La5Si3
tdb: tdb:LaSi-10Zho.tdb:LA5SI3_D8L, tdb:LaSi-20Xu.tdb:LA5SI3_D8L

TDB models of LA5SI3_D8L (2): PHASE and CONSTITUENT statements as written

LaSi-10Zho.tdb: LA5SI3_D8L, type code %, sha256 40aef7ee33d576b9…

51: PHASE LA5SI3_D8L % 2 5 3 !
52: CONST LA5SI3_D8L : LA : SI : !

LaSi-20Xu.tdb: LA5SI3_D8L, type code %, sha256 63d465a532cafc3b…

50: PHASE LA5SI3_D8L % 2 5 3 !
51: CONST LA5SI3_D8L : LA : SI : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase; reports values for this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase
doi:10.1016/s0925-8388(01)01686-3 M.V. Bulanova, P.N. Zheltov, K.A. Meleshevich, P.A. Saltykov, G. Effenberg, J.-C. Tedenac, Lanthanum–silicon system, Journal of Alloys and Compounds 329, 214-223 (2001).
cited as the source of values for this phase

LA5SI4 (La–Si)

Id: phase:la-si:la5si4; status assigned
Structure: Si4Zr5 · tP36 · P4_12_12 (92); type st:si4zr5-tp36; 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: La 0.5556, Si 0.4444
Stability: stable in 2 of 2 calculated diagram(s): 300–1833.91 K, x(Si) 0.44444–0.44444
Literature: 11 values (11 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:la-si:la5si4
paper: paper:10.1016/j.jallcom.2009.09.171:La5Si4, paper:10.1111/jace.17031:La5Si4
tdb: tdb:LaSi-10Zho.tdb:LA5SI4, tdb:LaSi-20Xu.tdb:LA5SI4

TDB models of LA5SI4 (2): PHASE and CONSTITUENT statements as written

LaSi-10Zho.tdb: LA5SI4, type code %, sha256 40aef7ee33d576b9…

61: PHASE LA5SI4 % 2 5 4 !
62: CONST LA5SI4 : LA : SI : !

LaSi-20Xu.tdb: LA5SI4, type code %, sha256 63d465a532cafc3b…

60: PHASE LA5SI4 % 2 5 4 !
61: CONST LA5SI4 : LA : SI : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase; reports values for this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/s0925-8388(01)01686-3 M.V. Bulanova, P.N. Zheltov, K.A. Meleshevich, P.A. Saltykov, G. Effenberg, J.-C. Tedenac, Lanthanum–silicon system, Journal of Alloys and Compounds 329, 214-223 (2001).
cited as the source of values for this phase

LASI_B27 (La–Si)

Id: phase:la-si:lasi-b27; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:name_suggests_B27_but_dft_space_group_63; name_suggests_B27_but_dft_space_group_63
Candidate (dft_mp): Cmcm (63) — on-hull MP LaSi at x(SI)=0.5000
Candidate (dft_oqmd): Cmcm (63) — on-hull OQMD La1 Si1 at x(SI)=0.5000
Candidate (literature_printed): FeB · oP8 — printed with a label mapped to this phase
Candidate (name_token): FeB · B27 · oP8 · Pnma (62) — Strukturbericht/word 'B27' in the TDB name
Candidate (sgte_mmc2): FeB · B27 · oP8 · Pnma (62) — Hallstedt 2025 mmc2 row for LASI_B27: LaSi
Candidate (tdb_comment): FeB · oP8 · Pnma — LaSi-10Zho.tdb: 'Prototype FeB (oP8, Pnma)'
Candidate (tdb_comment): FeB · oP8 · Pnma — LaSi-20Xu.tdb: 'Prototype FeB (oP8, Pnma)'
Stoichiometry: La 0.5000, Si 0.5000
Stability: stable in 2 of 2 calculated diagram(s): 300–1899.4 K, x(Si) 0.5–0.5
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-si:lasi-b27
paper: paper:10.1016/j.jallcom.2009.09.171:LaSi
tdb: tdb:LaSi-10Zho.tdb:LASI_B27, tdb:LaSi-20Xu.tdb:LASI_B27

TDB models of LASI_B27 (2): PHASE and CONSTITUENT statements as written

LaSi-10Zho.tdb: LASI_B27, type code %, sha256 40aef7ee33d576b9…

66: PHASE LASI_B27 % 2 1 1 !
67: CONST LASI_B27 : LA : SI : !

LaSi-20Xu.tdb: LASI_B27, type code %, sha256 63d465a532cafc3b…

65: PHASE LASI_B27 % 2 1 1 !
66: CONST LASI_B27 : LA : SI : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase; reports values for this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase
doi:10.1016/s0925-8388(01)01686-3 M.V. Bulanova, P.N. Zheltov, K.A. Meleshevich, P.A. Saltykov, G. Effenberg, J.-C. Tedenac, Lanthanum–silicon system, Journal of Alloys and Compounds 329, 214-223 (2001).
cited as the source of values for this phase

LASI2_CC (La–Si)

Id: phase:la-si:lasi2-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: DFT agrees: on-hull mp-aaaaadbi and oqmd-14081, space group 141
Stoichiometry: La 0.3333, Si 0.6667
Stability: stable in 2 of 2 calculated diagram(s): 300–1872.04 K, x(Si) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:la-si:lasi2-cc
mp: mp:mp-aaaaadbi
oqmd: oqmd:oqmd-14081
tdb: tdb:LaSi-10Zho.tdb:LASI2_CC, tdb:LaSi-20Xu.tdb:LASI2_CC

TDB models of LASI2_CC (2): PHASE and CONSTITUENT statements as written

LaSi-10Zho.tdb: LASI2_CC, type code %, sha256 40aef7ee33d576b9…

76: PHASE LASI2_CC % 2 1 2 !
77: CONST LASI2_CC : LA : SI : !

LaSi-20Xu.tdb: LASI2_CC, type code %, sha256 63d465a532cafc3b…

75: PHASE LASI2_CC % 2 1 2 !
76: CONST LASI2_CC : LA : SI : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase

LASI2_X (La–Si)

Id: phase:la-si:lasi2-x; status needs_review
No structure assigned. Why: name_has_descriptive_tokens:X; no_structure_token
Candidate (sgte_mmc2): GdSi1.4 · oI12 · Imma (74) — Hallstedt 2025 mmc2 row for LASI2_X: LaSi2-x
Candidate (tdb_comment): GdSi1.4 · oI12 · Imma — LaSi-10Zho.tdb: 'Prototype GdSi1.4 (oI12, Imma)'
Stoichiometry: La 0.3600, Si 0.6400
Stability: stable in 1 of 1 calculated diagram(s): 300–2000.18 K, x(Si) 0.64–0.64
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:la-si:lasi2-x
tdb: tdb:LaSi-10Zho.tdb:LASI2_X

TDB models of LASI2_X (1): PHASE and CONSTITUENT statements as written

LaSi-10Zho.tdb: LASI2_X, type code %, sha256 40aef7ee33d576b9…

71: PHASE LASI2_X % 2 0.36 0.64 !
72: CONST LASI2_X : LA : SI : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase

LIQUID (La–Si)

Id: phase:la-si:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 995.22–2500 K, x(Si) 0–1
Literature: 20 values (20 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-si:liquid
paper: paper:10.1016/j.jallcom.2009.09.171:L
tdb: tdb:LaSi-10Zho.tdb:LIQUID, tdb:LaSi-20Xu.tdb:LIQUID

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

LaSi-10Zho.tdb: LIQUID, type code %, sha256 40aef7ee33d576b9…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : LA SI : !

LaSi-20Xu.tdb: LIQUID, type code %, sha256 63d465a532cafc3b…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : LA SI : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2009.09.171 Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010).
assessment that models this phase; reports values for this phase
doi:10.1111/jace.17031 Kai Xu, Keke Chang, Xiaobing Zhou, Leilei Chen, Junwen Liu, Zixuan Deng et al., Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics, J Am Ceram Soc 103, 3812-3825 (2020).
assessment that models this phase
doi:10.1016/s0925-8388(01)01686-3 M.V. Bulanova, P.N. Zheltov, K.A. Meleshevich, P.A. Saltykov, G. Effenberg, J.-C. Tedenac, Lanthanum–silicon system, Journal of Alloys and Compounds 329, 214-223 (2001).
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}
}