Ge–Y system

60 accepted literature values from 1 paper(s) (experimental 26, model 34); 1 calculated phase diagram(s). 2 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 (14) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence classValues
experimental26
model34
Accepted values by property group
Property groupValues
invariant reaction28
phase transition9
formation23

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
GeY-13Idb.tdbM. Idbenali, C. Servant, J. Therm. Anal. Calorim., 111, 911-16(2013). doi:10.1007/s10973-012-2271-006a372a4f32faf120821f330a7702cab696f4e92fb451f414368f8042f13493aviewer · TDB · JSON
Calculated three-phase invariants (model, mole fraction of the second component)
TDB fileT (K)Phases at the invariant
GeY-13Idb.tdb2215.33GE4Y5 (x(Y) 0.55556) + LIQUID (x(Y) 0.57356) + GE3Y5_D88 (x(Y) 0.625)
GeY-13Idb.tdb2215.33GE4Y5 (x(Y) 0.55556) + LIQUID (x(Y) 0.57339) + GE3Y5_D88 (x(Y) 0.625)
GeY-13Idb.tdb2215.33GE4Y5 (x(Y) 0.55556) + LIQUID (x(Y) 0.57394) + GE3Y5_D88 (x(Y) 0.625)
GeY-13Idb.tdb2157.47LIQUID (x(Y) 0.47799) + GE10Y11 (x(Y) 0.52381) + GE4Y5 (x(Y) 0.55556)
GeY-13Idb.tdb2157.46LIQUID (x(Y) 0.47776) + GE10Y11 (x(Y) 0.52381) + GE4Y5 (x(Y) 0.55556)
GeY-13Idb.tdb2008.97LIQUID (x(Y) 0.39879) + GEY_B33 (x(Y) 0.5) + GE10Y11 (x(Y) 0.52381)
GeY-13Idb.tdb2008.97LIQUID (x(Y) 0.39871) + GEY_B33 (x(Y) 0.5) + GE10Y11 (x(Y) 0.52381)
GeY-13Idb.tdb2008.97LIQUID (x(Y) 0.39892) + GEY_B33 (x(Y) 0.5) + GE10Y11 (x(Y) 0.52381)
GeY-13Idb.tdb1735.74LIQUID (x(Y) 0.97305) + BCC_A2 (x(Y) 0.99709) + HCP_A3 (x(Y) 1)
GeY-13Idb.tdb1732.57LIQUID (x(Y) 0.31451) + GE3Y2_HT (x(Y) 0.4) + GEY_B33 (x(Y) 0.5)
GeY-13Idb.tdb1732.57LIQUID (x(Y) 0.31445) + GE3Y2_HT (x(Y) 0.4) + GEY_B33 (x(Y) 0.5)
GeY-13Idb.tdb1732.57LIQUID (x(Y) 0.31467) + GE3Y2_HT (x(Y) 0.4) + GEY_B33 (x(Y) 0.5)
GeY-13Idb.tdb1707.4GE3Y2_HT (x(Y) 0.4) + GE3Y2_C32 (x(Y) 0.4) + GEY_B33 (x(Y) 0.5)
GeY-13Idb.tdb1707.4LIQUID (x(Y) 0.30352) + GE3Y2_C32 (x(Y) 0.4) + GE3Y2_HT (x(Y) 0.4)
GeY-13Idb.tdb1707.4LIQUID (x(Y) 0.30331) + GE3Y2_HT (x(Y) 0.4) + GE3Y2_C32 (x(Y) 0.4)
GeY-13Idb.tdb1549.61GE3Y5_D88 (x(Y) 0.625) + LIQUID (x(Y) 0.90517) + HCP_A3 (x(Y) 1)
GeY-13Idb.tdb1177.32LIQUID (x(Y) 0.16179) + GE5Y3_CC (x(Y) 0.375) + GE3Y2_C32 (x(Y) 0.4)
GeY-13Idb.tdb1177.32LIQUID (x(Y) 0.16176) + GE5Y3_CC (x(Y) 0.375) + GE3Y2_C32 (x(Y) 0.4)
GeY-13Idb.tdb1132.58LIQUID (x(Y) 0.15153) + GE2Y (x(Y) 0.33333) + GE5Y3_CC (x(Y) 0.375)
GeY-13Idb.tdb1130.45LIQUID (x(Y) 0.15093) + GE7Y2 (x(Y) 0.22222) + GE2Y (x(Y) 0.33333)
GeY-13Idb.tdb1112.3DIAMOND_A4 (x(Y) 0) + LIQUID (x(Y) 0.13854) + GE7Y2 (x(Y) 0.22222)
GeY-13Idb.tdb1112.3DIAMOND_A4 (x(Y) 0) + LIQUID (x(Y) 0.13839) + GE7Y2 (x(Y) 0.22222)
GeY-13Idb.tdb1112.3DIAMOND_A4 (x(Y) 0) + LIQUID (x(Y) 0.13853) + GE7Y2 (x(Y) 0.22222)
GeY-13Idb.tdb1031.26DIAMOND_A4 (x(Y) 0) + GE7Y2 (x(Y) 0.22222) + GE2Y (x(Y) 0.33333)
GeY-13Idb.tdb1028.66DIAMOND_A4 (x(Y) 0) + GE2Y (x(Y) 0.33333) + GE5Y3_CC (x(Y) 0.375)
GeY-13Idb.tdb510.28GEY_B33 (x(Y) 0.5) + GE10Y11 (x(Y) 0.52381) + GE4Y5 (x(Y) 0.55556)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ge–Y system (28)
T (K)Reaction / phasesCompositions (mole fraction)ClassSourceLocationQuote
2218Ge4Y5 -> Liq + Ge3Y5Ge4Y5: Y 0.555556; L: Y 0.552; Ge3Y5: Y 0.625experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 19
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2214Ge4Y5 -> Liq + Ge3Y5Ge4Y5: Y 0.555556; L: Y 0.572; Ge3Y5: Y 0.625model[1] Idbenali 2013Table 3, p. 4, row 20
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2173Ge10Y11 -> Liq + Ge4Y5Ge10Y11: Y 0.52381; L: Y 0.498; Ge4Y5: Y 0.555556experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 17
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2157Ge10Y11 -> Liq + Ge4Y5Ge10Y11: Y 0.52381; L: Y 0.477; Ge4Y5: Y 0.555556model[1] Idbenali 2013Table 3, p. 4, row 18
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2003GeY -> Liq + Ge10Y11GeY: Y 0.5; L: Y 0.396; Ge10Y11: Y 0.52381model[1] Idbenali 2013Table 3, p. 4, row 16
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2003GeY -> Liq + Ge10Y11GeY: Y 0.5; L: Y 0.44; Ge10Y11: Y 0.52381experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 15
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1736HCP -> BCC + LiqL: Y 0.973model[1] Idbenali 2013Table 3, p. 4, row 26
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1733Ge1.5Y-HT -> GeY + LiqGe1.5Y-HT: Y 0.4; GeY: Y 0.5; L: Y 0.314model[1] Idbenali 2013Table 3, p. 4, row 14
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1733HCP -> BCC + LiqL: Y 0.97experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 25
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1732Ge1.5Y-HT -> GeY + LiqGe1.5Y-HT: Y 0.4; GeY: Y 0.5; L: Y 0.384experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 13
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1707Ge1.5Y-HT + Liq -> Ge1.5Y-LTGe1.5Y-HT: Y 0.4; L: Y 0.491; Ge1.5Y-LT: Y 0.4model[1] Idbenali 2013Table 3, p. 4, row 28
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1707Ge1.5Y-HT + GeY -> Ge1.5Y-LTGe1.5Y-HT: Y 0.303; GeY: Y 0.5; Ge1.5Y-LT: Y 0.4model[1] Idbenali 2013Table 3, p. 4, row 30
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1703Ge1.5Y-HT + Liq -> Ge1.5Y-LTGe1.5Y-HT: Y 0.4; L: Y 0.366; Ge1.5Y-LT: Y 0.4experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 27
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1703Ge1.5Y-HT + GeY -> Ge1.5Y-LTGe1.5Y-HT: Y 0.384; GeY: Y 0.5; Ge1.5Y-LT: Y 0.4experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 29
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1553eutectic: Liq -> HCP + Ge3Y5L: Y 0.88; Ge3Y5: Y 0.625experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 23
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1550eutectic: Liq -> HCP + Ge3Y5L: Y 0.905; Ge3Y5: Y 0.625model[1] Idbenali 2013Table 3, p. 4, row 24
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1181Ge5Y3 -> Liq + Ge1.5Y-LTGe5Y3: Y 0.375; L: Y 0.164; Ge1.5Y-LT: Y 0.4experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 11
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1177Ge5Y3 -> Liq + Ge1.5Y-LTGe5Y3: Y 0.375; L: Y 0.161; Ge1.5Y-LT: Y 0.4model[1] Idbenali 2013Table 3, p. 4, row 12
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1163Ge2Y -> Liq + Ge5Y3Ge2Y: Y 0.333333; L: Y 0.152; Ge5Y3: Y 0.375experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 9
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1150Ge2Y -> Liq + Ge5Y3Ge2Y: Y 0.333333; L: Y 0.155; Ge5Y3: Y 0.375model[1] Idbenali 2013Table 3, p. 4, row 10
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1133Ge7Y2 -> Ge2Y + LiqGe7Y2: Y 0.222222; Ge2Y: Y 0.333333; L: Y 0.142experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 7
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1132Ge7Y2 -> Ge2Y + LiqGe7Y2: Y 0.222222; Ge2Y: Y 0.333333; L: Y 0.15model[1] Idbenali 2013Table 3, p. 4, row 8
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1113(Ge) + Ge7Y2 -> Liq(Ge): Y 0; Ge7Y2: Y 0.222222; L: Y 0.137model[1] Idbenali 2013Table 3, p. 4, row 2
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1093(Ge) + Ge7Y2 -> Liq(Ge): Y 0; Ge7Y2: Y 0.222222; L: Y 0.119experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 1
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1033Ge7Y2 -> Ge2Y + (Ge)Ge7Y2: Y 0.222222; Ge2Y: Y 0.333333; (Ge): Y 0experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 5
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1031Ge7Y2 -> Ge2Y + (Ge)Ge7Y2: Y 0.222222; Ge2Y: Y 0.333333; (Ge): Y 0model[1] Idbenali 2013Table 3, p. 4, row 6
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985(Ge) + Ge5Y3 -> Ge2Y(Ge): Y 0; Ge5Y3: Y 0.375; Ge2Y: Y 0.333333experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 3
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982(Ge) + Ge5Y3 -> Ge2Y(Ge): Y 0; Ge5Y3: Y 0.375; Ge2Y: Y 0.333333model[1] Idbenali 2013Table 3, p. 4, row 4
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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, Ge–Y system (23)
PhaseCompoundValueT (K)ClassMP DFT (kJ/mol-atom)OQMD DFT (kJ/mol-atom)SourceLocationQuote
Ge1.5Y-HTGe3Y2-84.1 kJ/mol-atom ± 3.7870experimental-48.013 (mp-aaacreze)[1] Idbenali 2013
cites Polotskaya 1996 doi
Table 4, p. 5, row 7
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Ge1.5Y-HTGe3Y2-83.025 kJ/mol-atom2985model-48.013 (mp-aaacreze)[1] Idbenali 2013Table 4, p. 5, row 9
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Ge1.5Y-HTGe3Y2-67.903 kJ/mol-atom870model-48.013 (mp-aaacreze)[1] Idbenali 2013Table 4, p. 5, row 8
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Ge1.5Y-LTGe3Y2-84.785 kJ/mol-atom298.15model-48.013 (mp-aaacreze)[1] Idbenali 2013Table 4, p. 5, row 6
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Ge1.5Y-LTGe3Y2-77.8 kJ/mol-atom ± 3.4870experimental-48.013 (mp-aaacreze)[1] Idbenali 2013
cites Polotskaya 1996 doi
Table 4, p. 5, row 4
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Ge1.5Y-LTGe3Y2-69.664 kJ/mol-atom870model-48.013 (mp-aaacreze)[1] Idbenali 2013Table 4, p. 5, row 5
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Ge10Y11Ge10Y11-104.82 kJ/mol-atom298.15model-84.382 (mp-aaacqssw)[1] Idbenali 2013Table 4, p. 5, row 16
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Ge10Y11Ge10Y11-100.5 kJ/mol-atom ± 5.2870experimental-84.382 (mp-aaacqssw)[1] Idbenali 2013
cites Polotskaya 1996 doi
Table 4, p. 5, row 14
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Ge10Y11Ge10Y11-89.461 kJ/mol-atom870model-84.382 (mp-aaacqssw)[1] Idbenali 2013Table 4, p. 5, row 15
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Ge2YGe2Y-69.577 kJ/mol-atom298.15model-51.377 (mp-aaaaapcv)-59.996 (oqmd-1795069)[1] Idbenali 2013Table 4, p. 5, row 2
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Ge3Y5Ge3Y5-109.7 kJ/mol-atom ± 5.7298.15experimental-80.391 (mp-aaaabagt)-80.471 (oqmd-10313)[1] Idbenali 2013
cites Jung 1991 doi
Table 4, p. 5, row 20
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Ge3Y5Ge3Y5-107.41 kJ/mol-atom298.15model-80.391 (mp-aaaabagt)-80.471 (oqmd-10313)[1] Idbenali 2013Table 4, p. 5, row 23
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Ge3Y5Ge3Y5-91.861 kJ/mol-atom870model-80.391 (mp-aaaabagt)-80.471 (oqmd-10313)[1] Idbenali 2013Table 4, p. 5, row 22
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Ge3Y5Ge3Y5-89.8 kJ/mol-atom ± 5298.15experimental-80.391 (mp-aaaabagt)-80.471 (oqmd-10313)[1] Idbenali 2013
cites Safonov 1985
Table 4, p. 5, row 21
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Ge4Y5Ge4Y5-109.55 kJ/mol-atom298.15model-84.954 (mp-aaaaattw)-85.431 (oqmd-124138)[1] Idbenali 2013Table 4, p. 5, row 19
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Ge4Y5Ge4Y5-102.5 kJ/mol-atom ± 5.5870experimental-84.954 (mp-aaaaattw)-85.431 (oqmd-124138)[1] Idbenali 2013
cites Polotskaya 1996 doi
Table 4, p. 5, row 17
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Ge4Y5Ge4Y5-94.131 kJ/mol-atom870model-84.954 (mp-aaaaattw)-85.431 (oqmd-124138)[1] Idbenali 2013Table 4, p. 5, row 18
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Ge5Y3Ge5Y3-79.834 kJ/mol-atom298.15model-69.583 (mp-aaaaazik)-69.416 (oqmd-1795285)[1] Idbenali 2013Table 4, p. 5, row 3
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Ge7Y2-42.349 kJ/mol-atom298.15model[1] Idbenali 2013Table 4, p. 5, row 1
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GeYGeY-108.8 kJ/mol-atommodel-86.308 (mp-aaaaaotn)-86.397 (oqmd-7938)[1] Idbenali 2013
cites Miedema 1976 doi
Table 4, p. 5, row 24
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GeYGeY-101.53 kJ/mol-atom298.15model-86.308 (mp-aaaaaotn)-86.397 (oqmd-7938)[1] Idbenali 2013Table 4, p. 5, row 13
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GeYGeY-98 kJ/mol-atom ± 4.9870experimental-86.308 (mp-aaaaaotn)-86.397 (oqmd-7938)[1] Idbenali 2013
cites Polotskaya 1996 doi
Table 4, p. 5, row 10
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GeYGeY-86.218 kJ/mol-atom870model-86.308 (mp-aaaaaotn)-86.397 (oqmd-7938)[1] Idbenali 2013Table 4, p. 5, row 12
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Other properties

Phase transition (9)

Phase transition, Ge–Y system
PropertyValueT (K)Phases / compositionClassSourceLocationQuote
Phase transition1093 K1093(Ge) ? Ge7Y2 , Liqexperimental[1] Idbenali 2013
cites Schmidt 1972 doi
p. 4
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The temperature of invariant reactions fits well the experiments [1] except both the temperature of the invariant reaction: (Ge) ? Ge7Y2 , Liq (calculated 1113 K, measured 1093 K) and Ge10Y11 , Liq ? Ge4Y5 (calculated 2157 K, measured 2173 K).
Phase transition1113 K1113(Ge) ? Ge7Y2 , Liqmodel[1] Idbenali 2013p. 4
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The temperature of invariant reactions fits well the experiments [1] except both the temperature of the invariant reaction: (Ge) ? Ge7Y2 , Liq (calculated 1113 K, measured 1093 K) and Ge10Y11 , Liq ? Ge4Y5 (calculated 2157 K, measured 2173 K).
Phase transition1703 K1703polymorphicexperimental[1] Idbenali 2013
cites Schmidt 1972 doi
p. 1
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A polymorphic transition (Ge1.5Y_LT , Ge1.5Y_HT) was determined at 1703 K for Ge1.5Y in [1].
Phase transition1710 K1710polymorphicmodel[1] Idbenali 2013p. 4
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It is necessary to use all the digits of the optimized parameters listed in Table 3 for the calculation of the polymorphic transition temperature between the polytypes at T = 1710 K.
Phase transition2157 K2157Ge10Y11 , Liq ? Ge4Y5model[1] Idbenali 2013p. 4
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The temperature of invariant reactions fits well the experiments [1] except both the temperature of the invariant reaction: (Ge) ? Ge7Y2 , Liq (calculated 1113 K, measured 1093 K) and Ge10Y11 , Liq ? Ge4Y5 (calculated 2157 K, measured 2173 K).
Phase transition2173 K2173Ge10Y11 , Liq ? Ge4Y5experimental[1] Idbenali 2013
cites Schmidt 1972 doi
p. 4
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The temperature of invariant reactions fits well the experiments [1] except both the temperature of the invariant reaction: (Ge) ? Ge7Y2 , Liq (calculated 1113 K, measured 1093 K) and Ge10Y11 , Liq ? Ge4Y5 (calculated 2157 K, measured 2173 K).
Phase transition2238 K2238Ge3Y5 -> Liq
Ge3Y5: Y 0.625; L: Y 0.625
experimental[1] Idbenali 2013
cites Schmidt 1972 doi
Table 3, p. 4, row 21
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Phase transition2238 K2238congruent meltingexperimental[1] Idbenali 2013p. 1
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For the Ge3Y5 compound, a congruent melting was determined at 2238 K; for the Ge4Y5, Ge10Y11, GeY, Ge1.5Y-LT, Ge1.5Y-HT, Ge5Y3, Ge2Y and Ge7Y2 compounds, a peritectic formation was reported, respectively, at 2218, 2173, 2003, 1733, 1183, 1153, and 1133 K see Fig. 1.
Phase transition2241 K2241Ge3Y5 -> Liq
Ge3Y5: Y 0.625; L: Y 0.625
model[1] Idbenali 2013Table 3, p. 4, row 22
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Sources

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

  1. Mohamed Idbenali, Colette Servant, Thermodynamic optimization of the germanium–yttrium system, J Therm Anal Calorim 111, 911-916 (2013). doi:10.1007/s10973-012-2271-0