Sn–U system

57 accepted literature values from 2 paper(s) (experimental 32, model 19, unspecified 6); 2 calculated phase diagram(s). 11 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (15) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence classValues
experimental32
model19
unspecified6
Accepted values by property group
Property groupValues
invariant reaction38
formation17
crystal structure2

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB fileAssessmentSHA-256Links
SnU-21Wan.tdbJ. Wang, Y. Yuan, X. Cheng, Q. Zhang, R. Pan, A. Tang, J. Phase Equilib. Diffus., 42, 194-205(2021). doi:10.1007/s11669-021-00872-2bfb5a924fae70c95f81592d4e6676e0f3df1ddeb1cc71e68f044d0e330ec6304viewer · TDB · JSON
SnU-87She.tdbR.I. Sheldon, E.M. Foltyn, D.E. Petersen, Bull. Alloy Phase Diag., 8, 347-52(1987). doi:10.1007/BF0286927152159592cd32f1c5864a9a901734f19ad59c34b4f1b04b2efb118b8b9f67c388viewer · TDB · JSON
Calculated three-phase invariants (model, mole fraction of the second component)
TDB fileT (K)Phases at the invariant
SnU-21Wan.tdb1661.44LIQUID (x(U) 0.48103) + SNU (x(U) 0.5) + SN4U5 (x(U) 0.55556)
SnU-21Wan.tdb1661.44LIQUID (x(U) 0.48045) + SNU (x(U) 0.5) + SN4U5 (x(U) 0.55556)
SnU-21Wan.tdb1661.44LIQUID (x(U) 0.48124) + SNU (x(U) 0.5) + SN4U5 (x(U) 0.55556)
SnU-21Wan.tdb1661.44LIQUID (x(U) 0.48126) + SNU (x(U) 0.5) + SN4U5 (x(U) 0.55556)
SnU-21Wan.tdb1627.22LIQUID (x(U) 0.27752) + SN2U (x(U) 0.33333) + SNU (x(U) 0.5)
SnU-21Wan.tdb1627.22LIQUID (x(U) 0.27731) + SN2U (x(U) 0.33333) + SNU (x(U) 0.5)
SnU-21Wan.tdb1627.22LIQUID (x(U) 0.27813) + SN2U (x(U) 0.33333) + SNU (x(U) 0.5)
SnU-21Wan.tdb1627.22LIQUID (x(U) 0.27815) + SN2U (x(U) 0.33333) + SNU (x(U) 0.5)
SnU-21Wan.tdb1627.22LIQUID (x(U) 0.27729) + SN2U (x(U) 0.33333) + SNU (x(U) 0.5)
SnU-21Wan.tdb1615.46LIQUID (x(U) 0.22612) + SN7U3 (x(U) 0.3) + SN2U (x(U) 0.33333)
SnU-21Wan.tdb1615.46LIQUID (x(U) 0.22665) + SN7U3 (x(U) 0.3) + SN2U (x(U) 0.33333)
SnU-21Wan.tdb1615.46LIQUID (x(U) 0.22551) + SN7U3 (x(U) 0.3) + SN2U (x(U) 0.33333)
SnU-21Wan.tdb1615.46LIQUID (x(U) 0.22663) + SN7U3 (x(U) 0.3) + SN2U (x(U) 0.33333)
SnU-21Wan.tdb1615.46LIQUID (x(U) 0.22551) + SN7U3 (x(U) 0.3) + SN2U (x(U) 0.33333)
SnU-21Wan.tdb1604LIQUID (x(U) 0.19212) + SN3U_L12 (x(U) 0.25) + SN7U3 (x(U) 0.3)
SnU-21Wan.tdb1604LIQUID (x(U) 0.19174) + SN3U_L12 (x(U) 0.25) + SN7U3 (x(U) 0.3)
SnU-21Wan.tdb1604LIQUID (x(U) 0.19123) + SN3U_L12 (x(U) 0.25) + SN7U3 (x(U) 0.3)
SnU-21Wan.tdb1604LIQUID (x(U) 0.19121) + SN3U_L12 (x(U) 0.25) + SN7U3 (x(U) 0.3)
SnU-21Wan.tdb1388.3SN4U5 (x(U) 0.55556) + LIQUID (x(U) 0.97172) + BCC_A2 (x(U) 0.98014)
SnU-21Wan.tdb1388.3SN4U5 (x(U) 0.55556) + LIQUID (x(U) 0.97193) + BCC_A2 (x(U) 0.98031)
SnU-21Wan.tdb1048.83SN4U5 (x(U) 0.55556) + BCC_A2 (x(U) 0.99991) + TETRAGONAL_U (x(U) 0.99999)
SnU-21Wan.tdb1048.83SN4U5 (x(U) 0.55556) + BCC_A2 (x(U) 0.99991) + TETRAGONAL_U (x(U) 0.99999)
SnU-21Wan.tdb942.02SN4U5 (x(U) 0.55556) + ORTHORHOMBIC_A20 (x(U) 1) + TETRAGONAL_U (x(U) 1)
SnU-21Wan.tdb505.08BCT_A5 (x(U) 0) + LIQUID (x(U) 0) + SN3U_L12 (x(U) 0.25)
SnU-87She.tdb1619.61SN5U3 (x(U) 0.375) + LIQUID (x(U) 0.37751) + SN2U3 (x(U) 0.6)
SnU-87She.tdb1619.61SN5U3 (x(U) 0.375) + LIQUID (x(U) 0.37785) + SN2U3 (x(U) 0.6)
SnU-87She.tdb1619.61SN5U3 (x(U) 0.375) + LIQUID (x(U) 0.37743) + SN2U3 (x(U) 0.6)
SnU-87She.tdb1603.15SN3U_L12 (x(U) 0.25) + LIQUID (x(U) 0.27789) + SN5U3 (x(U) 0.375)
SnU-87She.tdb1603.15SN3U_L12 (x(U) 0.25) + LIQUID (x(U) 0.27786) + SN5U3 (x(U) 0.375)
SnU-87She.tdb1353.59SN2U3 (x(U) 0.6) + LIQUID (x(U) 0.96209) + BCC_A2 (x(U) 0.99073)
SnU-87She.tdb1353.59SN2U3 (x(U) 0.6) + LIQUID (x(U) 0.9621) + BCC_A2 (x(U) 0.99073)
SnU-87She.tdb1047.33SN2U3 (x(U) 0.6) + BCC_A2 (x(U) 0.99914) + TETRAGONAL_U (x(U) 1)
SnU-87She.tdb1047.33SN2U3 (x(U) 0.6) + BCC_A2 (x(U) 0.99914) + TETRAGONAL_U (x(U) 1)
SnU-87She.tdb942.02SN2U3 (x(U) 0.6) + ORTHORHOMBIC_A20 (x(U) 1) + TETRAGONAL_U (x(U) 1)
SnU-87She.tdb505.08BCT_A5 (x(U) 0) + LIQUID (x(U) 0) + SN3U_L12 (x(U) 0.25)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull SnU-87She

Invariant reactions (literature)

Invariant reactions reported in the literature for the Sn–U system (38)
T (K)Reaction / phasesCompositions (mole fraction)ClassSourceLocationQuote
1773.15congruent melting: L -> Sn2U3L: Sn 0.4, U 0.6; Sn2U3: Sn 0.4, U 0.6model[1] Sheldon 1987Table 1, p. 2, row 8
report
1773.15congruent melting: L -> Sn2U3L: U 0.6; Sn2U3: U 0.6model[1] Sheldon 1987Table 1, p. 2, row 7
report
1666.15congruent melting: Liquid->U5Sn4Liquid: U 0.556; U5Sn4: U 0.556experimental[2] Wang 2021
cites Wang 2016 doi
Table 3, p. 7, row 3
report
1663.15congruent melting: Liquid->U5Sn4Liquid: U 0.556; U5Sn4: U 0.556model[2] Wang 2021Table 3, p. 7, row 1
report
1663.15congruent melting: Liquid->U5Sn4Liquid: U 0.556; U5Sn4: U 0.556experimental[2] Wang 2021
cites Palenzona 1995 doi
Table 3, p. 7, row 2
report
1661.15peritectic: Liquid+U5Sn4->USnLiquid: U 0.5; U5Sn4: U 0.556; USn: U 0.5model[2] Wang 2021Table 3, p. 7, row 4
report
1658.15peritectic: Liquid+U5Sn4->USnLiquid: U 0.5; U5Sn4: U 0.556; USn: U 0.5experimental[2] Wang 2021
cites Palenzona 1995 doi
Table 3, p. 7, row 5
report
1655.15peritectic: Liquid+U5Sn4->USnLiquid: U 0.5; U5Sn4: U 0.556; USn: U 0.5experimental[2] Wang 2021
cites Wang 2016 doi
Table 3, p. 7, row 6
report
1653.15peritectic: L + Sn2U3 -> Sn5U3L: U 0.333; Sn2U3: U 0.6; Sn5U3: U 0.375model[1] Sheldon 1987Table 1, p. 2, row 5
report
1653.15peritectic: L + Sn2U3 -> Sn5U3L: U 0.338; Sn2U3: U 0.6; Sn5U3: U 0.375model[1] Sheldon 1987Table 1, p. 2, row 6
report
1653.15peritecticexperimental[1] Sheldon 1987
cites ref. 45Tre
p. 3
report
B a s e d on m e t a l l o g r a p h i c a n d t h e r m a l a n a l y s i s data, the composition of t h i s compound was proposed by [45Tre] to be Sn~U3, with a peritectic decomposition a t 1380 ~
1633.15peritectic: Liquid+USn->USn2USn: U 0.5; USn2: U 0.3333experimental[2] Wang 2021
cites Palenzona 1995 doi
Table 3, p. 7, row 8
report
1633.15peritectic: Liquid+USn->USn2Liquid: U 0.2903; USn: U 0.5; USn2: U 0.3333model[2] Wang 2021Table 3, p. 7, row 7
report
1633.15peritectic: Liquid+USn->USn2Liquid: U 0.256; USn: U 0.5; USn2: U 0.3333experimental[2] Wang 2021
cites Wang 2016 doi
Table 3, p. 7, row 9
report
1623.15peritectic: Liquid+USn2->U3Sn7USn2: U 0.3333; U3Sn7: U 0.3experimental[2] Wang 2021
cites Palenzona 1995 doi
Table 3, p. 7, row 11
report
1623.15peritectic: Liquid+USn2->U3Sn7Liquid: U 0.235; USn2: U 0.3333; U3Sn7: U 0.3model[2] Wang 2021Table 3, p. 7, row 10
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1623.15peritectic: L + Sn5U3 -> Sn3UL: U 0.232; Sn5U3: U 0.375; Sn3U: U 0.25model[1] Sheldon 1987Table 1, p. 2, row 3
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1623.15peritectic: L + Sn5U3 -> Sn3UL: U 0.244; Sn5U3: U 0.375; Sn3U: U 0.25model[1] Sheldon 1987Table 1, p. 2, row 4
report
1623.15peritecticexperimental[1] Sheldon 1987
cites ref. 45Tre
p. 3
report
[45Tre| reported this compound decomposes peritectically at 1350 ~
1623.15peritectic: Liquid+USn2->U3Sn7Liquid: U 0.221; USn2: U 0.3333; U3Sn7: U 0.3experimental[2] Wang 2021
cites Wang 2016 doi
Table 3, p. 7, row 12
report
1613.15peritectic: Liquid+U3Sn7->USn3U3Sn7: U 0.3; USn3: U 0.25experimental[2] Wang 2021
cites Palenzona 1995 doi
Table 3, p. 7, row 14
report
1613.15peritectic: Liquid+U3Sn7->USn3Liquid: U 0.196; U3Sn7: U 0.3; USn3: U 0.25experimental[2] Wang 2021
cites Wang 2016 doi
Table 3, p. 7, row 15
report
1613.15peritectic: Liquid+U3Sn7->USn3Liquid: U 0.1982; U3Sn7: U 0.3; USn3: U 0.25model[2] Wang 2021Table 3, p. 7, row 13
report
1408.15eutectic: L -> Sn2U3 + γUL: U 0.999; Sn2U3: U 0.6; γU: U 1model[1] Sheldon 1987Table 1, p. 2, row 9
report
1402.15eutectic: Liquid->bcc_A2+U5Sn4Liquid: U 0.97; bcc_A2: U 0.984; U5Sn4: U 0.556experimental[2] Wang 2021
cites Wang 2016 doi
Table 3, p. 7, row 18
report
1393.15eutectic: Liquid->bcc_A2+U5Sn4Liquid: U 0.88; U5Sn4: U 0.556experimental[2] Wang 2021
cites Palenzona 1995 doi
Table 3, p. 7, row 17
report
1388.15eutectic: Liquid->bcc_A2+U5Sn4Liquid: U 0.9682; bcc_A2: U 0.9661; U5Sn4: U 0.556model[2] Wang 2021Table 3, p. 7, row 16
report
1354.15eutectic: L -> Sn2U3 + γUL: U 0.97; Sn2U3: U 0.6; γU: U 1model[1] Sheldon 1987Table 1, p. 2, row 10
report
1049.15eutectoid: bcc_U->U5Sn4+Tetragonal_Ubcc_U: U 0.9953; U5Sn4: U 0.556; Tetragonal_U: U 0.9954experimental[2] Wang 2021
cites Wang 2016 doi
Table 3, p. 7, row 21
report
1049.15eutectoid: bcc_U->U5Sn4+Tetragonal_UU5Sn4: U 0.556experimental[2] Wang 2021
cites Palenzona 1995 doi
Table 3, p. 7, row 20
report
1049.15eutectoid: bcc_U->U5Sn4+Tetragonal_Ubcc_U: U 0.9999; U5Sn4: U 0.556; Tetragonal_U: U 1model[2] Wang 2021Table 3, p. 7, row 19
report
942.15eutectoid: Tetragonal_U+U5Sn4->Orthorhombic_UTetragonal_U: U 1; U5Sn4: U 0.556; Orthorhombic_U: U 1model[2] Wang 2021Table 3, p. 7, row 22
report
941.15eutectoid: Tetragonal_U+U5Sn4->Orthorhombic_UTetragonal_U: U 0.9971; U5Sn4: U 0.556; Orthorhombic_U: U 0.9968experimental[2] Wang 2021
cites Wang 2016 doi
Table 3, p. 7, row 24
report
938.15eutectoid: Tetragonal_U+U5Sn4->Orthorhombic_UU5Sn4: U 0.556experimental[2] Wang 2021
cites Palenzona 1995 doi
Table 3, p. 7, row 23
report
505.15eutectic: Liquid->USn3+bct_SnLiquid: U 0; USn3: U 0.25; bct_Sn: U 0model[2] Wang 2021Table 3, p. 7, row 25
report
505.15eutectic: Liquid->USn3+bct_SnUSn3: U 0.25experimental[2] Wang 2021
cites Palenzona 1995 doi
Table 3, p. 7, row 26
report
505.15eutectic: Liquid->USn3+bct_SnLiquid: U 0; USn3: U 0.25; bct_Sn: U 0experimental[2] Wang 2021
cites Wang 2016 doi
Table 3, p. 7, row 27
report
505.15other: L -> βSnL: U 0; βSn: U 0model[1] Sheldon 1987Table 1, p. 2, row 1
report

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, Sn–U system (17)
PhaseCompoundValueT (K)ClassMP DFT (kJ/mol-atom)OQMD DFT (kJ/mol-atom)SourceLocationQuote
U3Sn7Sn7U3-52.78 kJ/mol-atom794.15unspecified-12.21 (mp-aaacqpmz)[2] Wang 2021
cites Palenzona 1995 doi
Table 1, p. 3, row 4
report
USnSnU-88.45 kJ/mol-atom794.15unspecified4.115 (mp-aaacdipr)-2.203 (oqmd-1231159)[2] Wang 2021
cites Palenzona 1995 doi
Table 1, p. 3, row 2
report
USn2Sn2U-58.3 kJ/mol-atom794.15unspecified-9.73 (mp-aaacqroo)[2] Wang 2021
cites Palenzona 1995 doi
Table 1, p. 3, row 3
report
USn3Sn3U-43.47 kJ/mol-atom794.15experimental-12.058 (mp-aaaabece)-19.098 (oqmd-18132)[2] Wang 2021
cites Colinet 1988 doi
Table 1, p. 3, row 10
report
USn3-43.47 kJ/mol (basis unstated)794.15experimental[2] Wang 2021
cites Colinet 1988 doi
p. 2
report
Colinet et al.[26] reported the enthalpy of formation of USn3 as - 35.3 kJ mol-1 at 25 C and - 43.47 kJ mol-1 at 521 C characterized by solution calorimetry analysis.
USn3Sn3U-43.2 kJ/mol-atom794.15experimental-12.058 (mp-aaaabece)-19.098 (oqmd-18132)[2] Wang 2021
cites Pattanaik 2013 doi
Table 1, p. 3, row 11
report
USn3Sn3U-42.9 kJ/mol-atom965.15experimental-12.058 (mp-aaaabece)-19.098 (oqmd-18132)[2] Wang 2021
cites Kadochnikov 1976
Table 1, p. 3, row 12
report
USn3-41.8 kJ/mol (basis unstated)794.15experimental[2] Wang 2021
cites Johnson 1962
p. 2
report
Johnson et al.[24] reported the enthalpy of formation of USn3 as - 36.5 kJ mol-1 at 25 C and - 41.8 kJ mol-1 at 521 C using emf measurements.
USn3Sn3U-41.8 kJ/mol-atom794.15unspecified-12.058 (mp-aaaabece)-19.098 (oqmd-18132)[2] Wang 2021
cites Sheldon 1987 doi
Table 1, p. 3, row 9
report
USn3-36.5 kJ/mol (basis unstated)298.15experimental[2] Wang 2021
cites Johnson 1962
p. 2
report
Johnson et al.[24] reported the enthalpy of formation of USn3 as - 36.5 kJ mol-1 at 25 C and - 41.8 kJ mol-1 at 521 C using emf measurements.
USn3Sn3U-36.5 kJ/mol-atom298.15experimental-12.058 (mp-aaaabece)-19.098 (oqmd-18132)[2] Wang 2021
cites Johnson 1962
Table 1, p. 3, row 6
report
USn3-35.3 kJ/mol (basis unstated)298.15experimental[2] Wang 2021
cites Colinet 1988 doi
p. 2
report
Colinet et al.[26] reported the enthalpy of formation of USn3 as - 35.3 kJ mol-1 at 25 C and - 43.47 kJ mol-1 at 521 C characterized by solution calorimetry analysis.
USn3Sn3U-35.3 kJ/mol-atom298.15experimental-12.058 (mp-aaaabece)-19.098 (oqmd-18132)[2] Wang 2021
cites Colinet 1988 doi
Table 1, p. 3, row 7
report
USn3-24.06 kJ/mol (basis unstated)794.15experimental[2] Wang 2021
cites Alcock 1962
p. 2
report
For the thermodynamic properties of U-Sn binary system, Alcock et al.[22] reported the enthalpy of formation of USn3 as - 22.59 kJ mol-1 at 25 C using acid dissociation calorimetry and - 24.06 kJ mol-1 at 521 C using vapor pressure.
USn3Sn3U-24.06 kJ/mol-atom794.15experimental-12.058 (mp-aaaabece)-19.098 (oqmd-18132)[2] Wang 2021
cites Alcock 1962
Table 1, p. 3, row 8
report
USn3-22.59 kJ/mol (basis unstated)298.15experimental[2] Wang 2021
cites Alcock 1962
p. 2
report
For the thermodynamic properties of U-Sn binary system, Alcock et al.[22] reported the enthalpy of formation of USn3 as - 22.59 kJ mol-1 at 25 C using acid dissociation calorimetry and - 24.06 kJ mol-1 at 521 C using vapor pressure.
USn3Sn3U-22.59 kJ/mol-atom298.15unspecified-12.058 (mp-aaaabece)-19.098 (oqmd-18132)[2] Wang 2021
cites Palenzona 1995 doi
Table 1, p. 3, row 5
report

Other properties

Crystal structure (2)

Crystal structure, Sn–U system
PropertyValueT (K)Phases / compositionClassSourceLocationQuote
Lattice a4.6089 Å298.15Sn3U
alloy: Sn 0.75, U 0.25
model[1] Sheldon 1987
cites Sari 1983
Table 3, p. 3, row 9
report
Lattice a4.626 Å298.15Sn3U
Sn3U: Sn 0.75, U 0.25
unspecified[1] Sheldon 1987Table 3, p. 3, row 3
report

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

  1. R. I. Sheldon, E. M. Foltyn, D. E. Peterson, The Sn-U (Tin-Uranium) system, Bulletin of Alloy Phase Diagrams 8, 347-352 (1987). doi:10.1007/bf02869271
  2. Jun Wang, Yuan Yuan, Xiongying Cheng, Qin Zhang, Rongjian Pan, Aitao Tang, Thermodynamic Assessment of the U-Sn System and Extension to the U-Zr-Sn System, J. Phase Equilib. Diffus. 42, 194-205 (2021). doi:10.1007/s11669-021-00872-2