Na–Sn phases

16 phases (tier A 5, tier C 7, liquid 1, needs_review 3); 14 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 · Na–Sn system page · Markdown · field reference

Phases of the Na–Sn system (16)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCT_A5 phase:na-sn:a5-bct	beta-Sn · A5 · tI4 · I4_1/amd (141)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–505.08 K, x(Sn) 1–1	0	1
BCC_A2 phase:na-sn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–370.16 K, x(Sn) 0–0	5	1
FCC_A1 phase:na-sn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
HCP_A3 phase:na-sn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
LIQUID phase:na-sn:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 370.16–2500 K, x(Sn) 0–1	31	1
NA15SN4_D86 phase:na-sn:na15sn4-d86	Cu15Si4 · D8_6 · cI76 · I-43d (220)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–710 K, x(Sn) 0.21053–0.21053	14	1
NA3SN phase:na-sn:na3sn	Na3.7Sn · oP40 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–649.95 K, x(Sn) 0.25–0.25	3	1
NA4SN3 phase:na-sn:na4sn3		needs_review	stable in 1 of 1 calculated diagram(s): 621.35–840 K, x(Sn) 0.42857–0.42857	15	1
NA5SN13 phase:na-sn:na5sn13	Na5Sn13 · oC288 · Cmcm (63)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–562.08 K, x(Sn) 0.72222–0.72222	2	1
NA7SN12 phase:na-sn:na7sn12	Na7Sn12 · mP78 · P2/c (13)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–598.58 K, x(Sn) 0.63158–0.63158	2	1
NA9SN4 phase:na-sn:na9sn4	Ge4Li9 · oC52 · Cmcm (63)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–800 K, x(Sn) 0.30769–0.30769	25	1
NASN_HT phase:na-sn:nasn-ht		needs_review	stable in 1 of 1 calculated diagram(s): 756.27–851.27 K, x(Sn) 0.5–0.5	8	1
NASN_LT phase:na-sn:nasn-lt	NaPb · tI64 · I4_1/acd (142)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–756.27 K, x(Sn) 0.5–0.5	12	1
NASN2 phase:na-sn:nasn2	NaSn2 · mC48 · C2/m (12)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–580.67 K, x(Sn) 0.66667–0.66667	0	1
NASN4 phase:na-sn:nasn4		needs_review	stable in 1 of 1 calculated diagram(s): 300–502.28 K, x(Sn) 0.8–0.8	0	1
NASN5 phase:na-sn:nasn5	NaSn5 · tP12 · P-42_1m (113)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–499.39 K, x(Sn) 0.83333–0.83333	1	1

BCT_A5 (Na–Sn)

Id: phase:na-sn:a5-bct; status assigned
Structure: beta-Sn · A5 · tI4 · I4_1/amd (141); type st:a5-beta-sn-ti4; tier A: standard phase name; confidence high
Stoichiometry: Sn 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–505.08 K, x(Sn) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:na-sn:a5-bct
tdb: tdb:NaSn-17Dre.tdb:BCT_A5

TDB models of BCT_A5 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: BCT_A5, type code %, sha256 24426b5c698632e0…

50: PHASE BCT_A5 % 1 1 !
51: CONST BCT_A5 : SN : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase

BCC_A2 (Na–Sn)

Id: phase:na-sn: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 1 of 1 calculated diagram(s): 300–370.16 K, x(Sn) 0–0
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:bcc-a2
paper: paper:10.1016/j.jallcom.2016.11.003:(βNa)
tdb: tdb:NaSn-17Dre.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: BCC_A2, type code %B, sha256 24426b5c698632e0…

40: PHASE BCC_A2 %B 2 1 3 !
41: CONST BCC_A2 : NA% SN : VA : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase
doi:10.1002/zaac.19050460107 C. H. Mathewson, XV. Über die Verbindungen von Natrium mit Zinn, Z. Anorg. Chem. 46, 94-112 (1905).
cited as the source of values for this phase
doi:10.1016/j.jct.2013.06.005 Jian Wang, Naihua Miao, Patrice Chartrand, In-Ho Jung, Thermodynamic evaluation and optimization of the (Na + X) binary systems (X = Ag, Ca, In, Sn, Zn) using combined Calphad and first-principles methods of calculation, The Journal of Chemical Thermodynamics 66, 22-33 (2013).
cited as the source of values for this phase
doi:10.1039/dt9740001541 Peter Hubberstey, Richard J. Pulham, Solubility of tin and germanium in liquid sodium: the sodium–tin partial phase diagram, J. Chem. Soc., Dalton Trans., 1541-1544 (1974).
cited as the source of values for this phase
doi:10.1039/jr9280000947 William Hume-Rothery, CXXV.—The system sodium–tin, J. Chem. Soc. 0, 947-963 (1928).
cited as the source of values for this phase

FCC_A1 (Na–Sn)

Id: phase:na-sn: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 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:na-sn:fcc-a1
tdb: tdb:NaSn-17Dre.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: FCC_A1, type code %A, sha256 24426b5c698632e0…

35: PHASE FCC_A1 %A 2 1 1 !
36: CONST FCC_A1 : NA SN : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase

HCP_A3 (Na–Sn)

Id: phase:na-sn: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 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:na-sn:hcp-a3
tdb: tdb:NaSn-17Dre.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: HCP_A3, type code %A, sha256 24426b5c698632e0…

45: PHASE HCP_A3 %A 2 1 0.5 !
46: CONST HCP_A3 : NA SN : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase

LIQUID (Na–Sn)

Id: phase:na-sn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 370.16–2500 K, x(Sn) 0–1
Literature: 31 values (30 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:liquid
paper: paper:10.1016/j.jallcom.2016.11.003:L
tdb: tdb:NaSn-17Dre.tdb:LIQUID

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

NaSn-17Dre.tdb: LIQUID, type code %, sha256 24426b5c698632e0…

30: PHASE LIQUID:L % 1 1 !
31: CONST LIQUID:L : NA NASN NASN2 NA2SN SN : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase
doi:10.1002/zaac.19050460107 C. H. Mathewson, XV. Über die Verbindungen von Natrium mit Zinn, Z. Anorg. Chem. 46, 94-112 (1905).
cited as the source of values for this phase
doi:10.1016/j.jct.2013.06.005 Jian Wang, Naihua Miao, Patrice Chartrand, In-Ho Jung, Thermodynamic evaluation and optimization of the (Na + X) binary systems (X = Ag, Ca, In, Sn, Zn) using combined Calphad and first-principles methods of calculation, The Journal of Chemical Thermodynamics 66, 22-33 (2013).
cited as the source of values for this phase
doi:10.1039/jr9280000947 William Hume-Rothery, CXXV.—The system sodium–tin, J. Chem. Soc. 0, 947-963 (1928).
cited as the source of values for this phase
doi:10.1002/cber.191104403192 A. C. Vournasos, Über Bismutide und intermetallische Verbindungen, Ber. Dtsch. Chem. Ges. 44, 3266-3271 (1911).
cited as the source of values for this phase
doi:10.1021/j100872a008 G. J. Lamprecht, Peter Crowther, D. M. Kemp, Solubility of metals in liquid sodium. I. Sodium-tin, J. Phys. Chem. 71, 4209-4212 (1967).
cited as the source of values for this phase
doi:10.1039/dt9740001541 Peter Hubberstey, Richard J. Pulham, Solubility of tin and germanium in liquid sodium: the sodium–tin partial phase diagram, J. Chem. Soc., Dalton Trans., 1541-1544 (1974).
cited as the source of values for this phase

NA15SN4_D86 (Na–Sn)

Id: phase:na-sn:na15sn4-d86; status assigned
Structure: Cu15Si4 · D8_6 · cI76 · I-43d (220); type st:d8-6-cu15si4-ci76; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaabtok and oqmd-90363, space group 220
Stoichiometry: Na 0.7895, Sn 0.2105
Stability: stable in 1 of 1 calculated diagram(s): 300–710 K, x(Sn) 0.21053–0.21053
Literature: 14 values (14 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:na-sn:na15sn4-d86
mp: mp:mp-aaaabtok
oqmd: oqmd:oqmd-90363
paper: paper:10.1016/j.jallcom.2016.11.003:Na15Sn4
tdb: tdb:NaSn-17Dre.tdb:NA15SN4_D86

TDB models of NA15SN4_D86 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: NA15SN4_D86, type code %, sha256 24426b5c698632e0…

55: PHASE NA15SN4_D86 % 2 15 4 !
56: CONST NA15SN4_D86 : NA : SN : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2013.06.005 Jian Wang, Naihua Miao, Patrice Chartrand, In-Ho Jung, Thermodynamic evaluation and optimization of the (Na + X) binary systems (X = Ag, Ca, In, Sn, Zn) using combined Calphad and first-principles methods of calculation, The Journal of Chemical Thermodynamics 66, 22-33 (2013).
cited as the source of values for this phase
doi:10.1039/jr9280000947 William Hume-Rothery, CXXV.—The system sodium–tin, J. Chem. Soc. 0, 947-963 (1928).
cited as the source of values for this phase
doi:10.1002/zaac.19050460107 C. H. Mathewson, XV. Über die Verbindungen von Natrium mit Zinn, Z. Anorg. Chem. 46, 94-112 (1905).
cited as the source of values for this phase
doi:10.1002/cber.191104403192 A. C. Vournasos, Über Bismutide und intermetallische Verbindungen, Ber. Dtsch. Chem. Ges. 44, 3266-3271 (1911).
cited as the source of values for this phase
doi:10.1021/j100872a008 G. J. Lamprecht, Peter Crowther, D. M. Kemp, Solubility of metals in liquid sodium. I. Sodium-tin, J. Phys. Chem. 71, 4209-4212 (1967).
cited as the source of values for this phase
doi:10.1039/dt9740001541 Peter Hubberstey, Richard J. Pulham, Solubility of tin and germanium in liquid sodium: the sodium–tin partial phase diagram, J. Chem. Soc., Dalton Trans., 1541-1544 (1974).
cited as the source of values for this phase

NA3SN (Na–Sn)

Id: phase:na-sn:na3sn; status assigned
Structure: Na3.7Sn · oP40 · Pnma (62); type st:na3-7sn-op40; 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: Na 0.7500, Sn 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–649.95 K, x(Sn) 0.25–0.25
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:na3sn
paper: paper:10.1016/j.jallcom.2016.11.003:Na3Sn
tdb: tdb:NaSn-17Dre.tdb:NA3SN

TDB models of NA3SN (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: NA3SN, type code %, sha256 24426b5c698632e0…

60: PHASE NA3SN % 2 3 1 !
61: CONST NA3SN : NA : SN : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2013.06.005 Jian Wang, Naihua Miao, Patrice Chartrand, In-Ho Jung, Thermodynamic evaluation and optimization of the (Na + X) binary systems (X = Ag, Ca, In, Sn, Zn) using combined Calphad and first-principles methods of calculation, The Journal of Chemical Thermodynamics 66, 22-33 (2013).
cited as the source of values for this phase
doi:10.1039/jr9280000947 William Hume-Rothery, CXXV.—The system sodium–tin, J. Chem. Soc. 0, 947-963 (1928).
cited as the source of values for this phase

NA4SN3 (Na–Sn)

Id: phase:na-sn:na4sn3; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Na4Sn3) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Na4Sn3) — Hallstedt 2025 mmc2 row for NA4SN3: Na4Sn3
Stoichiometry: Na 0.5714, Sn 0.4286
Stability: stable in 1 of 1 calculated diagram(s): 621.35–840 K, x(Sn) 0.42857–0.42857
Literature: 15 values (14 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:na4sn3
paper: paper:10.1016/j.jallcom.2016.11.003:Na4Sn3
tdb: tdb:NaSn-17Dre.tdb:NA4SN3

TDB models of NA4SN3 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: NA4SN3, type code %, sha256 24426b5c698632e0…

70: PHASE NA4SN3 % 2 4 3 !
71: CONST NA4SN3 : NA : SN : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase
doi:10.1002/zaac.19050460107 C. H. Mathewson, XV. Über die Verbindungen von Natrium mit Zinn, Z. Anorg. Chem. 46, 94-112 (1905).
cited as the source of values for this phase
doi:10.1016/j.jct.2013.06.005 Jian Wang, Naihua Miao, Patrice Chartrand, In-Ho Jung, Thermodynamic evaluation and optimization of the (Na + X) binary systems (X = Ag, Ca, In, Sn, Zn) using combined Calphad and first-principles methods of calculation, The Journal of Chemical Thermodynamics 66, 22-33 (2013).
cited as the source of values for this phase
doi:10.1039/jr9280000947 William Hume-Rothery, CXXV.—The system sodium–tin, J. Chem. Soc. 0, 947-963 (1928).
cited as the source of values for this phase
doi:10.1002/cber.191104403192 A. C. Vournasos, Über Bismutide und intermetallische Verbindungen, Ber. Dtsch. Chem. Ges. 44, 3266-3271 (1911).
cited as the source of values for this phase

NA5SN13 (Na–Sn)

Id: phase:na-sn:na5sn13; status assigned
Structure: Na5Sn13 · oC288 · Cmcm (63); type st:na5sn13-oc288; 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: Na 0.2778, Sn 0.7222
Stability: stable in 1 of 1 calculated diagram(s): 300–562.08 K, x(Sn) 0.72222–0.72222
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:na5sn13
paper: paper:10.1016/j.jallcom.2016.11.003:Na5Sn13
tdb: tdb:NaSn-17Dre.tdb:NA5SN13

TDB models of NA5SN13 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: NA5SN13, type code %, sha256 24426b5c698632e0…

95: PHASE NA5SN13 % 2 5 13 !
96: CONST NA5SN13 : NA : SN : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase

NA7SN12 (Na–Sn)

Id: phase:na-sn:na7sn12; status assigned
Structure: Na7Sn12 · mP78 · P2/c (13); type st:na7sn12-mp78; 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: Na 0.3684, Sn 0.6316
Stability: stable in 1 of 1 calculated diagram(s): 300–598.58 K, x(Sn) 0.63158–0.63158
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:na7sn12
paper: paper:10.1016/j.jallcom.2016.11.003:Na7Sn12
tdb: tdb:NaSn-17Dre.tdb:NA7SN12

TDB models of NA7SN12 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: NA7SN12, type code %, sha256 24426b5c698632e0…

85: PHASE NA7SN12 % 2 7 12 !
86: CONST NA7SN12 : NA : SN : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase

NA9SN4 (Na–Sn)

Id: phase:na-sn:na9sn4; status assigned
Structure: Ge4Li9 · oC52 · Cmcm (63); type st:ge4li9-oc52; 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_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Na 0.6923, Sn 0.3077
Stability: stable in 1 of 1 calculated diagram(s): 300–800 K, x(Sn) 0.30769–0.30769
Literature: 25 values (25 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:na9sn4
paper: paper:10.1016/j.jallcom.2016.11.003:Na9Sn4
tdb: tdb:NaSn-17Dre.tdb:NA9SN4

TDB models of NA9SN4 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: NA9SN4, type code %, sha256 24426b5c698632e0…

65: PHASE NA9SN4 % 2 9 4 !
66: CONST NA9SN4 : NA : SN : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2013.06.005 Jian Wang, Naihua Miao, Patrice Chartrand, In-Ho Jung, Thermodynamic evaluation and optimization of the (Na + X) binary systems (X = Ag, Ca, In, Sn, Zn) using combined Calphad and first-principles methods of calculation, The Journal of Chemical Thermodynamics 66, 22-33 (2013).
cited as the source of values for this phase
doi:10.1039/jr9280000947 William Hume-Rothery, CXXV.—The system sodium–tin, J. Chem. Soc. 0, 947-963 (1928).
cited as the source of values for this phase
doi:10.1002/zaac.19050460107 C. H. Mathewson, XV. Über die Verbindungen von Natrium mit Zinn, Z. Anorg. Chem. 46, 94-112 (1905).
cited as the source of values for this phase
doi:10.1002/cber.191104403192 A. C. Vournasos, Über Bismutide und intermetallische Verbindungen, Ber. Dtsch. Chem. Ges. 44, 3266-3271 (1911).
cited as the source of values for this phase
doi:10.1021/j100872a008 G. J. Lamprecht, Peter Crowther, D. M. Kemp, Solubility of metals in liquid sodium. I. Sodium-tin, J. Phys. Chem. 71, 4209-4212 (1967).
cited as the source of values for this phase

NASN_HT (Na–Sn)

Id: phase:na-sn:nasn-ht; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition; sgte_mmc2_row_incomplete
Candidate (dft_mp): I4_1/acd (142) — on-hull MP NaSn at x(SN)=0.5000
Candidate (dft_oqmd): I41/acd (142) — on-hull OQMD Na1 Sn1 at x(SN)=0.5000
Candidate (literature_printed): (NaSn-ht) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (NaSn-ht) — Hallstedt 2025 mmc2 row for NASN_HT: NaSn (high T)
Stoichiometry: Na 0.5000, Sn 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 756.27–851.27 K, x(Sn) 0.5–0.5
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:nasn-ht
paper: paper:10.1016/j.jallcom.2016.11.003:(αNaSn)
tdb: tdb:NaSn-17Dre.tdb:NASN_HT

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

NaSn-17Dre.tdb: NASN_HT, type code %, sha256 24426b5c698632e0…

80: PHASE NASN_HT % 2 1 1 !
81: CONST NASN_HT : NA : SN : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase
doi:10.1002/cber.191104403192 A. C. Vournasos, Über Bismutide und intermetallische Verbindungen, Ber. Dtsch. Chem. Ges. 44, 3266-3271 (1911).
cited as the source of values for this phase
doi:10.1002/zaac.19050460107 C. H. Mathewson, XV. Über die Verbindungen von Natrium mit Zinn, Z. Anorg. Chem. 46, 94-112 (1905).
cited as the source of values for this phase
doi:10.1039/jr9280000947 William Hume-Rothery, CXXV.—The system sodium–tin, J. Chem. Soc. 0, 947-963 (1928).
cited as the source of values for this phase
doi:10.1016/j.jct.2013.06.005 Jian Wang, Naihua Miao, Patrice Chartrand, In-Ho Jung, Thermodynamic evaluation and optimization of the (Na + X) binary systems (X = Ag, Ca, In, Sn, Zn) using combined Calphad and first-principles methods of calculation, The Journal of Chemical Thermodynamics 66, 22-33 (2013).
cited as the source of values for this phase

NASN_LT (Na–Sn)

Id: phase:na-sn:nasn-lt; status assigned
Structure: NaPb · tI64 · I4_1/acd (142); type st:napb-ti64; 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: Na 0.5000, Sn 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–756.27 K, x(Sn) 0.5–0.5
Literature: 12 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:nasn-lt
paper: paper:10.1016/j.jallcom.2016.11.003:(βNaSn)
tdb: tdb:NaSn-17Dre.tdb:NASN_LT

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

NaSn-17Dre.tdb: NASN_LT, type code %, sha256 24426b5c698632e0…

75: PHASE NASN_LT % 2 1 1 !
76: CONST NASN_LT : NA : SN : !

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase; reports values for this phase
doi:10.1002/zaac.19050460107 C. H. Mathewson, XV. Über die Verbindungen von Natrium mit Zinn, Z. Anorg. Chem. 46, 94-112 (1905).
cited as the source of values for this phase
doi:10.1039/jr9280000947 William Hume-Rothery, CXXV.—The system sodium–tin, J. Chem. Soc. 0, 947-963 (1928).
cited as the source of values for this phase
doi:10.1002/cber.191104403192 A. C. Vournasos, Über Bismutide und intermetallische Verbindungen, Ber. Dtsch. Chem. Ges. 44, 3266-3271 (1911).
cited as the source of values for this phase
doi:10.1016/j.jct.2013.06.005 Jian Wang, Naihua Miao, Patrice Chartrand, In-Ho Jung, Thermodynamic evaluation and optimization of the (Na + X) binary systems (X = Ag, Ca, In, Sn, Zn) using combined Calphad and first-principles methods of calculation, The Journal of Chemical Thermodynamics 66, 22-33 (2013).
cited as the source of values for this phase

NASN2 (Na–Sn)

Id: phase:na-sn:nasn2; status assigned
Structure: NaSn2 · mC48 · C2/m (12); type st:nasn2-mc48; 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 (dft_space_group_12_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Na 0.3333, Sn 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–580.67 K, x(Sn) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:na-sn:nasn2
tdb: tdb:NaSn-17Dre.tdb:NASN2

TDB models of NASN2 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: NASN2, type code %, sha256 24426b5c698632e0…

90: PHASE NASN2 % 2 1 2 !
91: CONST NASN2 : NA : SN : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase

NASN4 (Na–Sn)

Id: phase:na-sn:nasn4; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (sgte_mmc2): (NaSn4) — Hallstedt 2025 mmc2 row for NASN4: NaSn4
Stoichiometry: Na 0.2000, Sn 0.8000
Stability: stable in 1 of 1 calculated diagram(s): 300–502.28 K, x(Sn) 0.8–0.8
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:na-sn:nasn4
tdb: tdb:NaSn-17Dre.tdb:NASN4

TDB models of NASN4 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: NASN4, type code %, sha256 24426b5c698632e0…

100: PHASE NASN4 % 2 1 4 !
101: CONST NASN4 : NA : SN : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
assessment that models this phase

NASN5 (Na–Sn)

Id: phase:na-sn:nasn5; status assigned
Structure: NaSn5 · tP12 · P-42_1m (113); type st:nasn5-tp12; 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_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Na 0.1667, Sn 0.8333
Stability: stable in 1 of 1 calculated diagram(s): 300–499.39 K, x(Sn) 0.83333–0.83333
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:na-sn:nasn5
paper: paper:10.1016/j.jallcom.2016.11.003:NaSn5
tdb: tdb:NaSn-17Dre.tdb:NASN5

TDB models of NASN5 (1): PHASE and CONSTITUENT statements as written

NaSn-17Dre.tdb: NASN5, type code %, sha256 24426b5c698632e0…

105: PHASE NASN5 % 2 1 5 !
106: CONST NASN5 : NA : SN : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jallcom.2016.11.003 Liya Dreval, Matthias Zschornak, Wolfram Münchgesang, Olga Fabrichnaya, David Rafaja, Miléna L. Martine et al., Thermodynamic assessment and first principle calculations of the Na Sb Sn system, Journal of Alloys and Compounds 695, 1725-1742 (2017).
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}
}