Ho–Ni system

149 accepted literature values from 3 paper(s) (experimental 41, model 94, unspecified 14); 2 calculated phase diagram(s). 4 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 (13) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence classValues
experimental41
model94
unspecified14
Accepted values by property group
Property groupValues
invariant reaction71
phase transition18
formation38
heat capacity / entropy / enthalpy22

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
HoNi-15Kar.tdbS. Kardellass, C. Servant, N. Selhaoui, J. Thermal Anal. Calorim., 119, 1225-34(2015). doi:10.1007/s10973-014-4189-1177f346c93bb88945400851e6f44de49db5f152086d2da69dc4ed49ef84fdb43viewer · TDB · JSON
HoNi-23Ye.tdbH. Ye, M. Rong, Q. Yao, Q. Chen, J. Wang, G. Rao, H. Zhou, J. Mater. Sci., 58, 1260-92(2023). doi:10.1007/s10853-022-08039-156caf76fef5f3fb037b7307e01e3b22123d7dfe940d6b4e814088c93527497f0viewer · TDB · JSON
Calculated three-phase invariants (model, mole fraction of the second component)
TDB fileT (K)Phases at the invariant
HoNi-15Kar.tdb1592.57LIQUID (x(Ni) 0.75724) + HO2NI7 (x(Ni) 0.77778) + HONI5_D2D (x(Ni) 0.83333)
HoNi-15Kar.tdb1592.56LIQUID (x(Ni) 0.7569) + HO2NI7 (x(Ni) 0.77778) + HONI5_D2D (x(Ni) 0.83333)
HoNi-15Kar.tdb1592.56LIQUID (x(Ni) 0.75672) + HO2NI7 (x(Ni) 0.77778) + HONI5_D2D (x(Ni) 0.83333)
HoNi-15Kar.tdb1560.42LIQUID (x(Ni) 0.71286) + HONI3 (x(Ni) 0.75) + HO2NI7 (x(Ni) 0.77778)
HoNi-15Kar.tdb1560.42LIQUID (x(Ni) 0.71311) + HONI3 (x(Ni) 0.75) + HO2NI7 (x(Ni) 0.77778)
HoNi-15Kar.tdb1560.42LIQUID (x(Ni) 0.71279) + HONI3 (x(Ni) 0.75) + HO2NI7 (x(Ni) 0.77778)
HoNi-15Kar.tdb1560.42LIQUID (x(Ni) 0.71278) + HONI3 (x(Ni) 0.75) + HO2NI7 (x(Ni) 0.77778)
HoNi-15Kar.tdb1559.09HONI5_D2D (x(Ni) 0.83333) + HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.92292)
HoNi-15Kar.tdb1559.09HONI5_D2D (x(Ni) 0.83333) + HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.92271)
HoNi-15Kar.tdb1551.96HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.93105) + FCC_A1 (x(Ni) 1)
HoNi-15Kar.tdb1551.96HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.93096) + FCC_A1 (x(Ni) 1)
HoNi-15Kar.tdb1551.96HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.93097) + FCC_A1 (x(Ni) 1)
HoNi-15Kar.tdb1551.96HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.93107) + FCC_A1 (x(Ni) 1)
HoNi-15Kar.tdb1469.69LIQUID (x(Ni) 0.63998) + HONI2_C15 (x(Ni) 0.66584) + HONI3 (x(Ni) 0.75)
HoNi-15Kar.tdb1469.69LIQUID (x(Ni) 0.64001) + HONI2_C15 (x(Ni) 0.66584) + HONI3 (x(Ni) 0.75)
HoNi-15Kar.tdb1325.05HONI_B27 (x(Ni) 0.5) + LIQUID (x(Ni) 0.53581) + HONI2_C15 (x(Ni) 0.65686)
HoNi-15Kar.tdb1325.05HONI_B27 (x(Ni) 0.5) + LIQUID (x(Ni) 0.5358) + HONI2_C15 (x(Ni) 0.65686)
HoNi-15Kar.tdb1240.64LIQUID (x(Ni) 0.39227) + HO3NI2_HT (x(Ni) 0.4) + HONI_B27 (x(Ni) 0.5)
HoNi-15Kar.tdb1240.64LIQUID (x(Ni) 0.39232) + HO3NI2_HT (x(Ni) 0.4) + HONI_B27 (x(Ni) 0.5)
HoNi-15Kar.tdb1031HO3NI2_HT (x(Ni) 0.4) + HO3NI2_LT (x(Ni) 0.4) + HONI_B27 (x(Ni) 0.5)
HoNi-15Kar.tdb1031LIQUID (x(Ni) 0.29286) + HO3NI2_LT (x(Ni) 0.4) + HO3NI2_HT (x(Ni) 0.4)
HoNi-15Kar.tdb1031LIQUID (x(Ni) 0.29272) + HO3NI2_HT (x(Ni) 0.4) + HO3NI2_LT (x(Ni) 0.4)
HoNi-15Kar.tdb1018.92HCP_A3 (x(Ni) 2.000e-5) + HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.25684)
HoNi-15Kar.tdb1018.92HCP_A3 (x(Ni) 2.000e-5) + HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.25676)
HoNi-15Kar.tdb1018.92HCP_A3 (x(Ni) 2.000e-5) + HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.25682)
HoNi-15Kar.tdb1010.67HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.28186) + HO3NI2_LT (x(Ni) 0.4)
HoNi-15Kar.tdb1010.67HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.28202) + HO3NI2_LT (x(Ni) 0.4)
HoNi-15Kar.tdb1010.67HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.28178) + HO3NI2_LT (x(Ni) 0.4)
HoNi-23Ye.tdb1592.49LIQUID (x(Ni) 0.76803) + HO2NI7 (x(Ni) 0.77778) + HONI5_D2D (x(Ni) 0.83333)
HoNi-23Ye.tdb1592.49LIQUID (x(Ni) 0.76818) + HO2NI7 (x(Ni) 0.77778) + HONI5_D2D (x(Ni) 0.83333)
HoNi-23Ye.tdb1592.49LIQUID (x(Ni) 0.768) + HO2NI7 (x(Ni) 0.77778) + HONI5_D2D (x(Ni) 0.83333)
HoNi-23Ye.tdb1561.5HONI5_D2D (x(Ni) 0.83333) + HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.91482)
HoNi-23Ye.tdb1561.5HONI5_D2D (x(Ni) 0.83333) + HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.91465)
HoNi-23Ye.tdb1558.25LIQUID (x(Ni) 0.72089) + HONI3 (x(Ni) 0.75) + HO2NI7 (x(Ni) 0.77778)
HoNi-23Ye.tdb1558.25LIQUID (x(Ni) 0.72117) + HONI3 (x(Ni) 0.75) + HO2NI7 (x(Ni) 0.77778)
HoNi-23Ye.tdb1558.25LIQUID (x(Ni) 0.72084) + HONI3 (x(Ni) 0.75) + HO2NI7 (x(Ni) 0.77778)
HoNi-23Ye.tdb1557.05HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.92132) + FCC_A1 (x(Ni) 0.99998)
HoNi-23Ye.tdb1557.05HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.92142) + FCC_A1 (x(Ni) 0.99998)
HoNi-23Ye.tdb1557.05HO2NI17 (x(Ni) 0.89474) + LIQUID (x(Ni) 0.92142) + FCC_A1 (x(Ni) 0.99998)
HoNi-23Ye.tdb1468.09LIQUID (x(Ni) 0.65761) + HONI2_C15 (x(Ni) 0.66605) + HONI3 (x(Ni) 0.75)
HoNi-23Ye.tdb1468.09LIQUID (x(Ni) 0.6577) + HONI2_C15 (x(Ni) 0.66605) + HONI3 (x(Ni) 0.75)
HoNi-23Ye.tdb1312.3HONI_B27 (x(Ni) 0.5) + LIQUID (x(Ni) 0.55349) + HONI2_C15 (x(Ni) 0.65825)
HoNi-23Ye.tdb1312.3HONI_B27 (x(Ni) 0.5) + LIQUID (x(Ni) 0.55347) + HONI2_C15 (x(Ni) 0.65825)
HoNi-23Ye.tdb1254.17HO3NI2_HT (x(Ni) 0.4) + LIQUID (x(Ni) 0.40513) + HONI_B27 (x(Ni) 0.5)
HoNi-23Ye.tdb1254.16HO3NI2_HT (x(Ni) 0.4) + LIQUID (x(Ni) 0.40497) + HONI_B27 (x(Ni) 0.5)
HoNi-23Ye.tdb1030.24HO3NI2_HT (x(Ni) 0.4) + HO3NI2_LT (x(Ni) 0.4) + HONI_B27 (x(Ni) 0.5)
HoNi-23Ye.tdb1030.24LIQUID (x(Ni) 0.31353) + HO3NI2_LT (x(Ni) 0.4) + HO3NI2_HT (x(Ni) 0.4)
HoNi-23Ye.tdb1027.44HCP_A3 (x(Ni) 3.000e-5) + HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.25145)
HoNi-23Ye.tdb1027.44HCP_A3 (x(Ni) 3.000e-5) + HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.25141)
HoNi-23Ye.tdb1002.77HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.29794) + HO3NI2_LT (x(Ni) 0.4)
HoNi-23Ye.tdb1002.77HO3NI_D011 (x(Ni) 0.25) + LIQUID (x(Ni) 0.29805) + HO3NI2_LT (x(Ni) 0.4)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull HoNi-15Kar

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ho–Ni system (71)
T (K)Reaction / phasesCompositions (mole fraction)ClassSourceLocationQuote
1747.15congruent melting: L -> (Ho)(Ho): Ho 1unspecified[1] Kardellass 2015Table 2, p. 3, row 1
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1728.15congruent melting: L -> (Ni)(Ni): Ho 0unspecified[1] Kardellass 2015Table 2, p. 3, row 14
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1703peritectic: L + bcc(Ho) -> hcp(Ho)L: Ni 0.02model[2] Ye 2023Table 10, p. 22, row 1
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1643.15congruent melting: L -> HoNi5HoNi5: Ho 0.167unspecified[1] Kardellass 2015Table 2, p. 3, row 11
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1593.15peritectic: L + HoNi5 -> Ho7Ni2L: Ho 0.26; HoNi5: Ho 0.167; Ho7Ni2: Ho 0.222unspecified[1] Kardellass 2015Table 2, p. 3, row 10
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1593.15peritecticexperimental[1] Kardellass 2015p. 2
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Six peritectic reactions included Ho3Ni, Ho2Ni3_HT, HoNi2, HoNi3, Ho2Ni7, and Ho2Ni17 at 750, 970, 1195, 1285, 1320, and 1290 C, respectively.
1593.15L + HoNi5 -> Ho7Ni2L: Ni 0.7587; HoNi5: Ni 0.833; Ho7Ni2: Ni 0.778model[1] Kardellass 2015Table 6, p. 7, row 22
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1593.15L + HoNi5 -> Ho7Ni2L: Ni 0.74; HoNi5: Ni 0.833; Ho7Ni2: Ni 0.778experimental[1] Kardellass 2015Table 6, p. 7, row 21
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1593peritectic: L + HoNi5 -> Ho2Ni7L: Ni 0.759; HoNi5: Ni 0.833333; Ho2Ni7: Ni 0.777778model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 26
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1593peritectic: L + HoNi5 -> Ho2Ni7HoNi5: Ni 0.833333; Ho2Ni7: Ni 0.777778experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 27
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1590.9peritectic: L + HoNi5 -> Ho2Ni7L: Ni 0.768; HoNi5: Ni 0.833333; Ho2Ni7: Ni 0.777778model[2] Ye 2023Table 10, p. 22, row 28
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1563.15peritecticexperimental[1] Kardellass 2015p. 2
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Six peritectic reactions included Ho3Ni, Ho2Ni3_HT, HoNi2, HoNi3, Ho2Ni7, and Ho2Ni17 at 750, 970, 1195, 1285, 1320, and 1290 C, respectively.
1563.15L + HoNi5 -> Ho17Ni2L: Ni 0.92; HoNi5: Ni 0.833; Ho17Ni2: Ni 0.895experimental[1] Kardellass 2015Table 6, p. 7, row 25
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1563.15L + HoNi5 -> Ho17Ni2L: Ni 0.9193; HoNi5: Ni 0.833; Ho17Ni2: Ni 0.895model[1] Kardellass 2015Table 6, p. 7, row 26
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1563.15peritectic: L + HoNi5 -> Ho17Ni2L: Ho 0.08; HoNi5: Ho 0.167; Ho17Ni2: Ho 0.105unspecified[1] Kardellass 2015Table 2, p. 3, row 12
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1563peritectic: L + HoNi5 -> Ho2Ni17HoNi5: Ni 0.833333; Ho2Ni17: Ni 0.894737experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 33
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1563peritectic: L + HoNi5 -> Ho2Ni17L: Ni 0.919; HoNi5: Ni 0.833333; Ho2Ni17: Ni 0.894737model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 32
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1560.3peritectic: L + HoNi5 -> Ho2Ni17L: Ni 0.915; HoNi5: Ni 0.833333; Ho2Ni17: Ni 0.894737model[2] Ye 2023Table 10, p. 22, row 34
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1558.15L + Ho7Ni2 -> HoNi3L: Ni 0.7; Ho7Ni2: Ni 0.778; HoNi3: Ni 0.75experimental[1] Kardellass 2015Table 6, p. 7, row 19
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1558.15peritecticexperimental[1] Kardellass 2015p. 2
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Six peritectic reactions included Ho3Ni, Ho2Ni3_HT, HoNi2, HoNi3, Ho2Ni7, and Ho2Ni17 at 750, 970, 1195, 1285, 1320, and 1290 C, respectively.
1558.15L + Ho7Ni2 -> HoNi3L: Ni 0.7019; Ho7Ni2: Ni 0.778; HoNi3: Ni 0.75model[1] Kardellass 2015Table 6, p. 7, row 20
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1558.15peritectic: L + Ho7Ni2 -> HoNi3L: Ho 0.3; Ho7Ni2: Ho 0.222; HoNi3: Ho 0.25unspecified[1] Kardellass 2015Table 2, p. 3, row 9
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1558peritectic: L + Ho2Ni7 -> HoNi3Ho2Ni7: Ni 0.777778; HoNi3: Ni 0.75experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 24
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1558peritectic: L + Ho2Ni7 -> HoNi3L: Ni 0.712; Ho2Ni7: Ni 0.777778; HoNi3: Ni 0.75model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 23
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1556eutectic: L -> fcc(Ni) + Ho2Ni17L: Ni 0.921; Ho2Ni17: Ni 0.894737model[2] Ye 2023Table 10, p. 22, row 37
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1555.8peritectic: L + Ho2Ni7 -> HoNi3L: Ni 0.72; Ho2Ni7: Ni 0.777778; HoNi3: Ni 0.75model[2] Ye 2023Table 10, p. 22, row 25
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1553.15eutecticexperimental[1] Kardellass 2015p. 2
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Three eutectic reactions formed between Ho3Ni and Ho2Ni3_LT at 720 C (30.0 at% Ni), between HoNi and HoNi2 at 975 C (54.0 at% Ni), and between Ho2Ni17 and Nickel at 1,280 C (93.0 at% Ni).
1553.15eutectic: L -> Ho17Ni2 + fcc_A1L: Ni 0.93; Ho17Ni2: Ni 0.895; fcc_A1: Ni 1experimental[1] Kardellass 2015Table 6, p. 7, row 27
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1553.15eutectic: L -> Ho17Ni2 + fcc_A1L: Ni 0.9314; Ho17Ni2: Ni 0.895; fcc_A1: Ni 1model[1] Kardellass 2015Table 6, p. 7, row 28
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1553.15eutectic: L -> Ho17Ni2 + fcc_A1L: Ho 0.07; Ho17Ni2: Ho 0.105; fcc_A1: Ho 0unspecified[1] Kardellass 2015Table 2, p. 3, row 13
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1553eutectic: L -> fcc(Ni) + Ho2Ni17L: Ni 0.931; Ho2Ni17: Ni 0.894737model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 35
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1553eutectic: L -> fcc(Ni) + Ho2Ni17L: Ni 0.93; Ho2Ni17: Ni 0.894737experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 36
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1468.15L + HoNi3 -> HoNi2L: Ni 0.63; HoNi3: Ni 0.75; HoNi2: Ni 0.667experimental[1] Kardellass 2015Table 6, p. 7, row 17
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1468.15peritectic: L + HoNi3 -> HoNi2L: Ho 0.37; HoNi3: Ho 0.25; HoNi2: Ho 0.333unspecified[1] Kardellass 2015Table 2, p. 3, row 8
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1468.15peritecticexperimental[1] Kardellass 2015p. 2
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Six peritectic reactions included Ho3Ni, Ho2Ni3_HT, HoNi2, HoNi3, Ho2Ni7, and Ho2Ni17 at 750, 970, 1195, 1285, 1320, and 1290 C, respectively.
1468.15L + HoNi3 -> HoNi2L: Ni 0.64; HoNi3: Ni 0.75; HoNi2: Ni 0.667model[1] Kardellass 2015Table 6, p. 7, row 18
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1468peritectic: L + HoNi3 -> HoNi2L: Ni 0.64; HoNi3: Ni 0.75; HoNi2: Ni 0.666667model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 20
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1468peritectic: L + HoNi3 -> HoNi2HoNi3: Ni 0.75; HoNi2: Ni 0.666667experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 21
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1465.2peritectic: L + HoNi3 -> HoNi2L: Ni 0.657; HoNi3: Ni 0.75; HoNi2: Ni 0.666667model[2] Ye 2023Table 10, p. 22, row 22
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1333.15congruent melting: L -> HoNiHoNi: Ho 0.5unspecified[1] Kardellass 2015Table 2, p. 3, row 6
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1322.15eutectic: L -> HoNi + HoNi2L: Ni 0.5355; HoNi: Ni 0.5; HoNi2: Ni 0.659model[1] Kardellass 2015Table 6, p. 7, row 16
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1322eutectic: L -> HoNi + HoNi2L: Ni 0.536; HoNi: Ni 0.5; HoNi2: Ni 0.666667model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 17
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1308.9eutectic: L -> HoNi + HoNi2L: Ni 0.553; HoNi: Ni 0.5; HoNi2: Ni 0.666667model[2] Ye 2023Table 10, p. 22, row 19
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1248.15eutecticexperimental[1] Kardellass 2015p. 2
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Three eutectic reactions formed between Ho3Ni and Ho2Ni3_LT at 720 C (30.0 at% Ni), between HoNi and HoNi2 at 975 C (54.0 at% Ni), and between Ho2Ni17 and Nickel at 1,280 C (93.0 at% Ni).
1248.15eutectic: L -> HoNi + HoNi2L: Ni 0.54; HoNi: Ni 0.5; HoNi2: Ni 0.656experimental[1] Kardellass 2015Table 6, p. 7, row 15
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1248.15eutectic: L -> HoNi + HoNi2L: Ho 0.46; HoNi: Ho 0.5; HoNi2: Ho 0.344unspecified[1] Kardellass 2015Table 2, p. 3, row 7
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1248eutectic: L -> HoNi + HoNi2L: Ni 0.54; HoNi: Ni 0.5; HoNi2: Ni 0.666667experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 18
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1243.15L + HoNi -> Ho3Ni2_HTL: Ni 0.38; HoNi: Ni 0.5; Ho3Ni2_HT: Ni 0.4experimental[1] Kardellass 2015Table 6, p. 7, row 11
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1243.15peritecticexperimental[1] Kardellass 2015p. 2
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Six peritectic reactions included Ho3Ni, Ho2Ni3_HT, HoNi2, HoNi3, Ho2Ni7, and Ho2Ni17 at 750, 970, 1195, 1285, 1320, and 1290 C, respectively.
1243.15peritectic: L + HoNi -> Ho3Ni2_HTL: Ho 0.62; HoNi: Ho 0.5; Ho3Ni2_HT: Ho 0.6unspecified[1] Kardellass 2015Table 2, p. 3, row 4
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1243peritectic: L + HoNi -> Ho3Ni2_HTHoNi: Ni 0.5; Ho3Ni2_HT: Ni 0.4experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 12
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1241.15L + HoNi -> Ho3Ni2_HTL: Ni 0.3944; HoNi: Ni 0.5; Ho3Ni2_HT: Ni 0.4model[1] Kardellass 2015Table 6, p. 7, row 12
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1241peritectic: L + HoNi -> Ho3Ni2_HTL: Ni 0.394; HoNi: Ni 0.5; Ho3Ni2_HT: Ni 0.4model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 11
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1240.4peritectic: L + HoNi -> Ho3Ni2_HTL: Ni 0.399; HoNi: Ni 0.5; Ho3Ni2_HT: Ni 0.4model[2] Ye 2023Table 10, p. 22, row 13
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1033.15L + HoNi -> Ho3Ni2_LTL: Ni 0.31; HoNi: Ni 0.5; Ho3Ni2_LT: Ni 0.4experimental[1] Kardellass 2015Table 6, p. 7, row 9
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1033.15polymorphic: Ho3Ni2_HT -> Ho3Ni2_LTHo3Ni2_HT: Ho 0.6; Ho3Ni2_LT: Ho 0.6, Ni 0.4unspecified[1] Kardellass 2015Table 2, p. 3, row 5
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1031.15L + HoNi -> Ho3Ni2_LTL: Ni 0.2951; HoNi: Ni 0.5; Ho3Ni2_LT: Ni 0.4model[1] Kardellass 2015Table 6, p. 7, row 10
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1023.15L + Ho -> Ho3NiL: Ni 0.29; Ho: Ni 0; Ho3Ni: Ni 0.25experimental[1] Kardellass 2015Table 6, p. 7, row 3
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1023.15peritecticexperimental[1] Kardellass 2015p. 2
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Six peritectic reactions included Ho3Ni, Ho2Ni3_HT, HoNi2, HoNi3, Ho2Ni7, and Ho2Ni17 at 750, 970, 1195, 1285, 1320, and 1290 C, respectively.
1023.15peritectic: L + Ho -> Ho3NiL: Ho 0.71; Ho: Ho 1; Ho3Ni: Ho 0.75unspecified[1] Kardellass 2015Table 2, p. 3, row 2
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1023peritectic: L + hcp(Ho) -> Ho3NiL: Ni 0.3; Ho3Ni: Ni 0.25experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 3
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1020.2peritectic: L + hcp(Ho) -> Ho3NiL: Ni 0.251; Ho3Ni: Ni 0.25model[2] Ye 2023Table 10, p. 22, row 4
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1014.15L + Ho -> Ho3NiL: Ni 0.2563; Ho: Ni 0; Ho3Ni: Ni 0.25model[1] Kardellass 2015Table 6, p. 7, row 4
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1014peritectic: L + hcp(Ho) -> Ho3NiL: Ni 0.256; Ho3Ni: Ni 0.25model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 2
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1006.15eutectic: L -> Ho3Ni + Ho3Ni2_LTL: Ni 0.2813; Ho3Ni: Ni 0.25; Ho3Ni2_LT: Ni 0.4model[1] Kardellass 2015Table 6, p. 7, row 6
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1006eutectic: L -> Ho3Ni + Ho3Ni2_LTL: Ni 0.281; Ho3Ni: Ni 0.25; Ho3Ni2_LT: Ni 0.4model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 5
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996.3eutectic: L -> Ho3Ni + Ho3Ni2_LTL: Ni 0.297; Ho3Ni: Ni 0.25; Ho3Ni2_LT: Ni 0.4model[2] Ye 2023Table 10, p. 22, row 7
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993.15eutectic: L -> Ho3Ni + Ho3Ni2_LTL: Ho 0.7; Ho3Ni: Ho 0.75; Ho3Ni2_LT: Ho 0.6unspecified[1] Kardellass 2015Table 2, p. 3, row 3
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993.15eutecticexperimental[1] Kardellass 2015p. 2
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Three eutectic reactions formed between Ho3Ni and Ho2Ni3_LT at 720 C (30.0 at% Ni), between HoNi and HoNi2 at 975 C (54.0 at% Ni), and between Ho2Ni17 and Nickel at 1,280 C (93.0 at% Ni).
993.15eutectic: L -> Ho3Ni + Ho3Ni2_LTL: Ni 0.3; Ho3Ni: Ni 0.25; Ho3Ni2_LT: Ni 0.4experimental[1] Kardellass 2015Table 6, p. 7, row 5
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993eutectic: L -> Ho3Ni + Ho3Ni2_LTHo3Ni: Ni 0.25; Ho3Ni2_LT: Ni 0.4experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 6
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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, Ho–Ni system (38)
PhaseCompoundValueT (K)ClassMP DFT (kJ/mol-atom)OQMD DFT (kJ/mol-atom)SourceLocationQuote
Ho2Ni17Ho2Ni17-23.1 kJ/mol-atom ± 0.3650experimental-19.799 (mp-aaacqkjz)-20.143 (oqmd-30551)[1] Kardellass 2015
cites Gozzi 2005 doi
Table 3, p. 4, row 32
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Ho2Ni17Ho2Ni17-21.33 kJ/mol-atom298.15model-19.799 (mp-aaacqkjz)-20.143 (oqmd-30551)[1] Kardellass 2015Table 3, p. 4, row 33
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Ho2Ni17Ho2Ni17-16 kJ/mol-atom298.15model-19.799 (mp-aaacqkjz)-20.143 (oqmd-30551)[1] Kardellass 2015
cites Kayzel 1995
Table 3, p. 4, row 34
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Ho2Ni17Ho2Ni17-16 kJ/mol-atom298.15model-19.799 (mp-aaacqkjz)-20.143 (oqmd-30551)[1] Kardellass 2015
cites de Boer FR 1989
Table 3, p. 4, row 31
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Ho2Ni7Ho2Ni7-40 kJ/mol-atom298.15model-38.648 (mp-aaacpsuu)-39.098 (oqmd-1483994)[1] Kardellass 2015Table 3, p. 4, row 24
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Ho2Ni7Ho2Ni7-39.92 kJ/mol-atom298.15model-38.648 (mp-aaacpsuu)-39.098 (oqmd-1483994)[1] Kardellass 2015Table 3, p. 4, row 25
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Ho2Ni7Ho2Ni7-35 kJ/mol-atom298.15model-38.648 (mp-aaacpsuu)-39.098 (oqmd-1483994)[1] Kardellass 2015
cites de Boer FR 1989
Table 3, p. 4, row 23
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Ho2Ni7Ho2Ni7-34 kJ/mol-atom298.15model-38.648 (mp-aaacpsuu)-39.098 (oqmd-1483994)[1] Kardellass 2015
cites Kayzel 1995
Table 3, p. 4, row 26
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Ho3NiHo3Ni-38 kJ/mol-atom298.15model-24.74 (mp-aaacprea)-25.183 (oqmd-30550)[1] Kardellass 2015Table 3, p. 4, row 2
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Ho3NiHo3Ni-25 kJ/mol-atom298.15model-24.74 (mp-aaacprea)-25.183 (oqmd-30550)[1] Kardellass 2015
cites de Boer FR 1989
Table 3, p. 4, row 1
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Ho3NiHo3Ni-24 kJ/mol-atom298.15model-24.74 (mp-aaacprea)-25.183 (oqmd-30550)[1] Kardellass 2015
cites Kayzel 1995
Table 3, p. 4, row 4
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Ho3NiHo3Ni-23.95 kJ/mol-atom298.15model-24.74 (mp-aaacprea)-25.183 (oqmd-30550)[1] Kardellass 2015Table 3, p. 4, row 3
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Ho3Ni2_HTHo3Ni2-28.34 kJ/mol-atom298.15model-36.512 (mp-aaacjmkp)-37.585 (oqmd-30549)[1] Kardellass 2015Table 3, p. 4, row 9
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Ho3Ni2_LTHo3Ni2-47 kJ/mol-atom298.15model-36.512 (mp-aaacjmkp)-37.585 (oqmd-30549)[1] Kardellass 2015Table 3, p. 4, row 6
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Ho3Ni2_LTHo3Ni2-40 kJ/mol-atom298.15model-36.512 (mp-aaacjmkp)-37.585 (oqmd-30549)[1] Kardellass 2015
cites de Boer FR 1989
Table 3, p. 4, row 5
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Ho3Ni2_LTHo3Ni2-38.45 kJ/mol-atom298.15model-36.512 (mp-aaacjmkp)-37.585 (oqmd-30549)[1] Kardellass 2015Table 3, p. 4, row 7
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Ho3Ni2_LTHo3Ni2-38 kJ/mol-atom298.15model-36.512 (mp-aaacjmkp)-37.585 (oqmd-30549)[1] Kardellass 2015
cites Kayzel 1995
Table 3, p. 4, row 8
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HoNiHoNi-48.8 kJ/mol-atom298.15model-45.179 (mp-aaaaarop)-45.907 (oqmd-18379)[1] Kardellass 2015Table 3, p. 4, row 13
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HoNiHoNi-48.6 kJ/mol-atom ± 0.771476experimental-45.179 (mp-aaaaarop)-45.907 (oqmd-18379)[1] Kardellass 2015
cites Gozzi 2005 doi
Table 3, p. 4, row 12
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HoNiHoNi-48.23 kJ/mol-atom298.15model-45.179 (mp-aaaaarop)-45.907 (oqmd-18379)[1] Kardellass 2015Table 3, p. 4, row 14
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HoNiHoNi-45 kJ/mol-atom298.15model-45.179 (mp-aaaaarop)-45.907 (oqmd-18379)[1] Kardellass 2015
cites de Boer FR 1989
Table 3, p. 4, row 10
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HoNiHoNi-41.7 kJ/mol-atom ± 1.41476experimental-45.179 (mp-aaaaarop)-45.907 (oqmd-18379)[1] Kardellass 2015
cites Guo 1998 doi
Table 3, p. 4, row 11
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HoNi2HoNi2-47.5 kJ/mol-atom298.15model-44.81 (mp-aaaaaazx)-44.977 (oqmd-17463)[1] Kardellass 2015Table 3, p. 4, row 16
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HoNi2HoNi2-45 kJ/mol-atom298.15model-44.81 (mp-aaaaaazx)-44.977 (oqmd-17463)[1] Kardellass 2015
cites de Boer FR 1989
Table 3, p. 4, row 15
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HoNi2HoNi2-45 kJ/mol-atom298.15model-44.81 (mp-aaaaaazx)-44.977 (oqmd-17463)[1] Kardellass 2015
cites Kayzel 1995
Table 3, p. 4, row 18
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HoNi2HoNi2-42.67 kJ/mol-atom298.15model-44.81 (mp-aaaaaazx)-44.977 (oqmd-17463)[1] Kardellass 2015Table 3, p. 4, row 17
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HoNi3HoNi3-42.5 kJ/mol-atom298.15model-41.055 (mp-aaaaadao)-41.425 (oqmd-19842)[1] Kardellass 2015Table 3, p. 4, row 20
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HoNi3HoNi3-40.01 kJ/mol-atom298.15model-41.055 (mp-aaaaadao)-41.425 (oqmd-19842)[1] Kardellass 2015Table 3, p. 4, row 21
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HoNi3HoNi3-37 kJ/mol-atom298.15model-41.055 (mp-aaaaadao)-41.425 (oqmd-19842)[1] Kardellass 2015
cites de Boer FR 1989
Table 3, p. 4, row 19
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HoNi3HoNi3-37 kJ/mol-atom298.15model-41.055 (mp-aaaaadao)-41.425 (oqmd-19842)[1] Kardellass 2015
cites Kayzel 1995
Table 3, p. 4, row 22
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HoNi5HoNi5-35.49 kJ/mol-atom ± 0.041476experimental-32.138 (mp-aaaaacht)-32.728 (oqmd-17464)[1] Kardellass 2015
cites Guo 1998 doi
Table 3, p. 4, row 29
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HoNi5HoNi5-34.04 kJ/mol-atom298.15model-32.138 (mp-aaaaacht)-32.728 (oqmd-17464)[1] Kardellass 2015Table 3, p. 4, row 30
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HoNi5HoNi5-29.9 kJ/mol-atom ± 0.81474experimental-32.138 (mp-aaaaacht)-32.728 (oqmd-17464)[1] Kardellass 2015
cites Pot 1993
Table 3, p. 4, row 28
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HoNi5HoNi5-26 kJ/mol-atom298.15model-32.138 (mp-aaaaacht)-32.728 (oqmd-17464)[1] Kardellass 2015
cites de Boer FR 1989
Table 3, p. 4, row 27
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Ni17Ho2Ho2Ni17-21.33 kJ/mol-atom298.15model-19.799 (mp-aaacqkjz)-20.143 (oqmd-30551)[3] Kardellass 2016
cites Kardellass 2015 doi
Table 4, p. 7, row 2
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Ni2HoHoNi2-42.67 kJ/mol-atom298.15model-44.81 (mp-aaaaaazx)-44.977 (oqmd-17463)[3] Kardellass 2016
cites Kardellass 2015 doi
Table 4, p. 7, row 9
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Ni5HoHoNi5-34.04 kJ/mol-atom298.15model-32.138 (mp-aaaaacht)-32.728 (oqmd-17464)[3] Kardellass 2016
cites Kardellass 2015 doi
Table 4, p. 7, row 5
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NiHoHoNi-48.23 kJ/mol-atom298.15model-45.179 (mp-aaaaarop)-45.907 (oqmd-18379)[3] Kardellass 2016
cites Kardellass 2015 doi
Table 4, p. 7, row 13
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Other properties

Phase transition (18)

Phase transition, Ho–Ni system
PropertyValueT (K)Phases / compositionClassSourceLocationQuote
Phase transition1030.2 K1030.2polymorphic: Ho3Ni2_HT -> Ho3Ni2_LT
Ho3Ni2_HT: Ni 0.4; Ho3Ni2_LT: Ni 0.4
model[2] Ye 2023Table 10, p. 22, row 10
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Phase transition1031 K1031polymorphic: Ho3Ni2_HT -> Ho3Ni2_LT
Ho3Ni2_HT: Ni 0.4; Ho3Ni2_LT: Ni 0.4
model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 8
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Phase transition1031.15 K1031.15Ho3Ni2_HT -> Ho3Ni2_LT
Ho3Ni2_HT: Ni 0.4; Ho3Ni2_LT: Ni 0.4
model[1] Kardellass 2015Table 6, p. 7, row 8
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Phase transition1033 K1033polymorphic: Ho3Ni2_HT -> Ho3Ni2_LT
Ho3Ni2_HT: Ni 0.4; Ho3Ni2_LT: Ni 0.4
experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 9
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Phase transition1033.15 K1033.15Ho3Ni2_HT -> Ho3Ni2_LT
Ho3Ni2_HT: Ni 0.4; Ho3Ni2_LT: Ni 0.4
experimental[1] Kardellass 2015Table 6, p. 7, row 7
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Phase transition1333 K1333congruent melting: L -> HoNi
L: Ni 0.5; HoNi: Ni 0.5
model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 14
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Phase transition1333 K1333congruent melting: L -> HoNi
L: Ni 0.5; HoNi: Ni 0.5
experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 15
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Phase transition1333.15 K1333.15L -> HoNi
L: Ni 0.5; HoNi: Ni 0.5
model[1] Kardellass 2015Table 6, p. 7, row 14
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Phase transition1333.15 K1333.15L -> HoNi
L: Ni 0.5; HoNi: Ni 0.5
experimental[1] Kardellass 2015Table 6, p. 7, row 13
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Phase transition1338 K1338congruent melting: L -> HoNi
L: Ni 0.5; HoNi: Ni 0.5
model[2] Ye 2023Table 10, p. 22, row 16
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Phase transition1638.2 K1638.2congruent melting: L -> HoNi5
L: Ni 0.833; HoNi5: Ni 0.833333
model[2] Ye 2023Table 10, p. 22, row 31
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Phase transition1643 K1643congruent melting: L -> HoNi5
L: Ni 0.833; HoNi5: Ni 0.833333
experimental[2] Ye 2023
cites ref. 45
Table 10, p. 22, row 30
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Phase transition1643 K1643congruent melting: L -> HoNi5
L: Ni 0.833; HoNi5: Ni 0.833333
model[2] Ye 2023
cites ref. 40
Table 10, p. 22, row 29
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Phase transition1643.15 K1643.15L -> HoNi5
L: Ni 0.833; HoNi5: Ni 0.833
experimental[1] Kardellass 2015Table 6, p. 7, row 23
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Phase transition1643.15 K1643.15L -> HoNi5
L: Ni 0.833; HoNi5: Ni 0.833
model[1] Kardellass 2015Table 6, p. 7, row 24
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Phase transition1643.15 K1643.15congruent transformationexperimental[1] Kardellass 2015p. 2
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Two congruent meltings for HoNi and HoNi5 at 1,060 and 1,370 C.
Phase transition1747.15 K1747.15L -> (Ho)
L: Ni 0; (Ho): Ni 0
model[1] Kardellass 2015Table 6, p. 7, row 2
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Phase transition1747.15 K1747.15L -> (Ho)
L: Ni 0; (Ho): Ni 0
experimental[1] Kardellass 2015Table 6, p. 7, row 1
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Heat capacity / entropy / enthalpy (22)

Heat capacity / entropy / enthalpy, Ho–Ni system
PropertyValueT (K)Phases / compositionClassSourceLocationQuote
Entropy
printed: Entropy of formation
33.56 J/mol-atom/K298.15Ho2Ni17
alloy: Ni 0.894737
model[1] Kardellass 2015Table 3, p. 4, row 33
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Entropy
printed: Entropy of formation
36.3 J/mol-atom/K298.15Ho2Ni7
alloy: Ni 0.777778
model[1] Kardellass 2015Table 3, p. 4, row 25
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Entropy
printed: Entropy of formation
59.24 J/mol-atom/K298.15Ho3Ni
alloy: Ni 0.25
model[1] Kardellass 2015Table 3, p. 4, row 3
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Entropy
printed: Entropy of formation
63.25 J/mol-atom/K298.15Ho3Ni2_HT
alloy: Ni 0.4
model[1] Kardellass 2015Table 3, p. 4, row 9
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Entropy
printed: Entropy of formation
53.31 J/mol-atom/K298.15Ho3Ni2_LT
alloy: Ni 0.4
model[1] Kardellass 2015Table 3, p. 4, row 7
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Entropy
printed: Entropy of formation
46.21 J/mol-atom/K298.15HoNi
alloy: Ni 0.5
model[1] Kardellass 2015Table 3, p. 4, row 14
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Entropy
printed: Entropy of formation
42.32 J/mol-atom/K298.15HoNi2
alloy: Ni 0.666667
model[1] Kardellass 2015Table 3, p. 4, row 17
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Entropy
printed: Entropy of formation
38.16 J/mol-atom/K298.15HoNi3
alloy: Ni 0.75
model[1] Kardellass 2015Table 3, p. 4, row 21
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Entropy
printed: Entropy of formation
34.27 J/mol-atom/K298.15HoNi5
alloy: Ni 0.833333
model[1] Kardellass 2015Table 3, p. 4, row 30
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Entropy
printed: Entropies of formation
33.56 J/mol-atom/K298.15Ni17Ho2
alloy: Ho 0.105263, Ni 0.894737
model[3] Kardellass 2016
cites Kardellass 2015 doi
Table 4, p. 7, row 2
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Entropy
printed: Entropies of formation
42.32 J/mol-atom/K298.15Ni2Ho
alloy: Ho 0.333333, Ni 0.666667
model[3] Kardellass 2016
cites Kardellass 2015 doi
Table 4, p. 7, row 9
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Entropy
printed: Entropies of formation
34.27 J/mol-atom/K298.15Ni5Ho
alloy: Ho 0.166667, Ni 0.833333
model[3] Kardellass 2016
cites Kardellass 2015 doi
Table 4, p. 7, row 5
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Entropy
printed: Entropies of formation
46.21 J/mol-atom/K298.15NiHo
alloy: Ho 0.5, Ni 0.5
model[3] Kardellass 2016
cites Kardellass 2015 doi
Table 4, p. 7, row 13
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Heat capacity25.21 J/mol-atom/K298.15Ho2Ni17
alloy: Ni 0.894737
model[1] Kardellass 2015Table 3, p. 4, row 33
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Heat capacity25.46 J/mol-atom/K298.15Ho2Ni7
alloy: Ni 0.777778
model[1] Kardellass 2015Table 3, p. 4, row 25
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Heat capacity26.61 J/mol-atom/K298.15Ho3Ni
alloy: Ni 0.25
model[1] Kardellass 2015Table 3, p. 4, row 3
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Heat capacity25.85 J/mol-atom/K298.15Ho3Ni2_HT
alloy: Ni 0.4
model[1] Kardellass 2015Table 3, p. 4, row 9
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Heat capacity26.28 J/mol-atom/K298.15Ho3Ni2_LT
alloy: Ni 0.4
model[1] Kardellass 2015Table 3, p. 4, row 7
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Heat capacity26.07 J/mol-atom/K298.15HoNi
alloy: Ni 0.5
model[1] Kardellass 2015Table 3, p. 4, row 14
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Heat capacity25.71 J/mol-atom/K298.15HoNi2
alloy: Ni 0.666667
model[1] Kardellass 2015Table 3, p. 4, row 17
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Heat capacity25.52 J/mol-atom/K298.15HoNi3
alloy: Ni 0.75
model[1] Kardellass 2015Table 3, p. 4, row 21
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Heat capacity25.34 J/mol-atom/K298.15HoNi5
alloy: Ni 0.833333
model[1] Kardellass 2015Table 3, p. 4, row 30
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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. S. Kardellass, C. Servant, N. Selhaoui, Thermodynamic description of the holmium–nickel system, J Therm Anal Calorim 119, 1225-1234 (2015). doi:10.1007/s10973-014-4189-1
  2. Hongjian Ye, Maohua Rong, Qingrong Yao, Qing Chen, Jiang Wang, Guanghui Rao et al., Phase equilibria and thermodynamic properties in the RE-Ni (RE = rare earth metals) binary systems, J Mater Sci 58, 1260-1292 (2023). doi:10.1007/s10853-022-08039-1
  3. Saïd Kardellass, Colette Servant, Najim Selhaoui, Thermodynamic description of the Ni–Yb and Ni–Eu binary systems, J Therm Anal Calorim 125, 255-269 (2016). doi:10.1007/s10973-016-5380-3