Ge–Hf system

100 accepted literature values from 1 paper(s) (experimental 57, model 20, DFT 7, unspecified 16); 1 calculated phase diagram(s). 7 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 (11) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	57
model	20
DFT	7
unspecified	16

Accepted values by property group
Property group	Values
invariant reaction	21
phase transition	1
phase equilibrium	15
formation	20
crystal structure	43

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 file	Assessment	SHA-256	Links
GeHf-14Tan.tdb	Y. Tang, B. Hu, J. Wang, Y. Du, K. Cheng, D. Liu, M. Yin, P. Nash, J. Mater. Sci., 49, 1306-16(2014). doi:10.1007/s10853-013-7814-7	`574342ac8bd9d16bdf547613289ee641bba41ebbdc478a520ca5e900102b2a75`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GeHf-14Tan.tdb	2433.25	LIQUID (x(Hf) 0.55811) + GE2HF3_D5A (x(Hf) 0.6) + GE3HF5_D88 (x(Hf) 0.625)
GeHf-14Tan.tdb	2433.25	LIQUID (x(Hf) 0.558) + GE2HF3_D5A (x(Hf) 0.6) + GE3HF5_D88 (x(Hf) 0.625)
GeHf-14Tan.tdb	2433.25	LIQUID (x(Hf) 0.55857) + GE2HF3_D5A (x(Hf) 0.6) + GE3HF5_D88 (x(Hf) 0.625)
GeHf-14Tan.tdb	2415.3	LIQUID (x(Hf) 0.5348) + GE4HF5 (x(Hf) 0.55556) + GE2HF3_D5A (x(Hf) 0.6)
GeHf-14Tan.tdb	2415.3	LIQUID (x(Hf) 0.53444) + GE4HF5 (x(Hf) 0.55556) + GE2HF3_D5A (x(Hf) 0.6)
GeHf-14Tan.tdb	2415.3	LIQUID (x(Hf) 0.5342) + GE4HF5 (x(Hf) 0.55556) + GE2HF3_D5A (x(Hf) 0.6)
GeHf-14Tan.tdb	2294.83	GE3HF5_D88 (x(Hf) 0.625) + GEHF2_C16 (x(Hf) 0.66667) + LIQUID (x(Hf) 0.76988)
GeHf-14Tan.tdb	2294.83	GE3HF5_D88 (x(Hf) 0.625) + GEHF2_C16 (x(Hf) 0.66667) + LIQUID (x(Hf) 0.76974)
GeHf-14Tan.tdb	2257.18	GEHF2_C16 (x(Hf) 0.66667) + GEHF3 (x(Hf) 0.75) + LIQUID (x(Hf) 0.78973)
GeHf-14Tan.tdb	2257.18	GEHF2_C16 (x(Hf) 0.66667) + GEHF3 (x(Hf) 0.75) + LIQUID (x(Hf) 0.78957)
GeHf-14Tan.tdb	2257.18	GEHF2_C16 (x(Hf) 0.66667) + GEHF3 (x(Hf) 0.75) + LIQUID (x(Hf) 0.78984)
GeHf-14Tan.tdb	2046.83	GEHF3 (x(Hf) 0.75) + LIQUID (x(Hf) 0.88208) + BCC_A2 (x(Hf) 0.99993)
GeHf-14Tan.tdb	2046.83	GEHF3 (x(Hf) 0.75) + LIQUID (x(Hf) 0.8821) + BCC_A2 (x(Hf) 0.99993)
GeHf-14Tan.tdb	2022.59	LIQUID (x(Hf) 0.29961) + GE2HF_C49 (x(Hf) 0.33333) + GE4HF5 (x(Hf) 0.55556)
GeHf-14Tan.tdb	2022.59	LIQUID (x(Hf) 0.29983) + GE2HF_C49 (x(Hf) 0.33333) + GE4HF5 (x(Hf) 0.55556)
GeHf-14Tan.tdb	2022.59	LIQUID (x(Hf) 0.29959) + GE2HF_C49 (x(Hf) 0.33333) + GE4HF5 (x(Hf) 0.55556)
GeHf-14Tan.tdb	2015.94	GEHF3 (x(Hf) 0.75) + BCC_A2 (x(Hf) 0.99994) + HCP_A3 (x(Hf) 0.99996)
GeHf-14Tan.tdb	1514.4	GE4HF5 (x(Hf) 0.55556) + GE2HF3_D5A (x(Hf) 0.6) + GE3HF5_D88 (x(Hf) 0.625)
GeHf-14Tan.tdb	1206.82	DIAMOND_A4 (x(Hf) 0) + LIQUID (x(Hf) 0.01249) + GE2HF_C49 (x(Hf) 0.33333)
GeHf-14Tan.tdb	1206.82	DIAMOND_A4 (x(Hf) 0) + LIQUID (x(Hf) 0.01244) + GE2HF_C49 (x(Hf) 0.33333)
GeHf-14Tan.tdb	1206.82	DIAMOND_A4 (x(Hf) 0) + LIQUID (x(Hf) 0.01241) + GE2HF_C49 (x(Hf) 0.33333)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ge–Hf system (21)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2473.15	congruent melting: Liquid -> Hf5Ge3	Liquid: Ge 0.375, Hf 0.625; Hf5Ge3: Ge 0.375, Hf 0.625	experimental	[1] Tang 2014 cites Nowotny 1960	Table 6, p. 9, row 9 report
2466.35	congruent melting: Liquid -> Hf5Ge3	Liquid: Ge 0.375, Hf 0.625; Hf5Ge3: Ge 0.375, Hf 0.625	model	[1] Tang 2014	Table 6, p. 9, row 10 report
2436.35	peritectic: Liquid + Hf5Ge3 -> Hf3Ge2	Hf5Ge3: Ge 0.375, Hf 0.625; Hf3Ge2: Ge 0.4, Hf 0.6	model	[1] Tang 2014 cites Gokhale 1990 doi	Table 6, p. 9, row 11 report
2433.75	peritectic: Liquid + Hf5Ge3 -> Hf3Ge2	Hf5Ge3: Ge 0.375, Hf 0.625; Hf3Ge2: Ge 0.4, Hf 0.6	model	[1] Tang 2014	Table 6, p. 9, row 12 report
2415.35	peritectic: Liquid + Hf3Ge2 -> Hf5Ge4	Hf3Ge2: Ge 0.4, Hf 0.6; Hf5Ge4: Ge 0.444444, Hf 0.555556	model	[1] Tang 2014	Table 6, p. 9, row 14 report
2412.55	peritectic: Liquid + Hf3Ge2 -> Hf5Ge4	Hf3Ge2: Ge 0.4, Hf 0.6; Hf5Ge4: Ge 0.444444, Hf 0.555556	model	[1] Tang 2014 cites Nowotny 1960	Table 6, p. 9, row 13 report
2299.15	peritectic: Liquid + Hf5Ge3 -> Hf2Ge	Hf5Ge3: Ge 0.375, Hf 0.625; Hf2Ge: Ge 0.333333, Hf 0.666667	experimental	[1] Tang 2014 cites Nowotny 1960	Table 6, p. 9, row 7 report
2295.55	peritectic: Liquid + Hf5Ge3 -> Hf2Ge	Hf5Ge3: Ge 0.375, Hf 0.625; Hf2Ge: Ge 0.333333, Hf 0.666667	model	[1] Tang 2014	Table 6, p. 9, row 8 report
2256.15	peritectic: Liquid + Hf2Ge -> Hf3Ge	Hf2Ge: Ge 0.333333, Hf 0.666667; Hf3Ge: Ge 0.25, Hf 0.75	model	[1] Tang 2014	Table 6, p. 9, row 6 report
2251.35	peritectic: Liquid + Hf2Ge -> Hf3Ge	Hf2Ge: Ge 0.333333, Hf 0.666667; Hf3Ge: Ge 0.25, Hf 0.75	model	[1] Tang 2014 cites Gokhale 1990 doi	Table 6, p. 9, row 5 report
2048.15	eutectic: Liquid -> (βHf) + Hf3Ge	Hf3Ge: Ge 0.25, Hf 0.75	experimental	[1] Tang 2014 cites Nowotny 1960	Table 6, p. 9, row 1 report
2047.05	eutectic: Liquid -> (βHf) + Hf3Ge	Hf3Ge: Ge 0.25, Hf 0.75	model	[1] Tang 2014	Table 6, p. 9, row 2 report
2022.85	peritectic: Liquid + Hf5Ge4 -> HfGe2	Hf5Ge4: Ge 0.444444, Hf 0.555556; HfGe2: Ge 0.666667, Hf 0.333333	model	[1] Tang 2014	Table 6, p. 9, row 16 report
2018.15	peritectoid: (βHf) + Hf3Ge -> (αHf)	Hf3Ge: Ge 0.25, Hf 0.75	experimental	[1] Tang 2014 cites Nowotny 1960	Table 6, p. 9, row 3 report
2017.35	peritectoid: (βHf) + Hf3Ge -> (αHf)	Hf3Ge: Ge 0.25, Hf 0.75	model	[1] Tang 2014	Table 6, p. 9, row 4 report
2017.15	peritectic: Liquid + Hf5Ge4 -> HfGe2	Hf5Ge4: Ge 0.444444, Hf 0.555556; HfGe2: Ge 0.666667, Hf 0.333333	experimental	[1] Tang 2014 cites Nowotny 1960	Table 6, p. 9, row 15 report
1512.05	eutectoid: Hf3Ge2 -> Hf5Ge3 + Hf5Ge4	Hf3Ge2: Ge 0.4, Hf 0.6; Hf5Ge3: Ge 0.375, Hf 0.625; Hf5Ge4: Ge 0.444444, Hf 0.555556	model	[1] Tang 2014	Table 6, p. 9, row 21 report
1373.15	eutectoid: Hf3Ge2 -> Hf5Ge3 + Hf5Ge4	Hf3Ge2: Ge 0.4, Hf 0.6; Hf5Ge3: Ge 0.375, Hf 0.625; Hf5Ge4: Ge 0.444444, Hf 0.555556	experimental	[1] Tang 2014	Table 6, p. 9, row 20 report
1206.45	eutectic: Liquid -> HfGe2 + (Ge)	HfGe2: Ge 0.666667, Hf 0.333333	model	[1] Tang 2014	Table 6, p. 9, row 19 report
1205.75	eutectic: Liquid -> HfGe2 + (Ge)	HfGe2: Ge 0.666667, Hf 0.333333	experimental	[1] Tang 2014	Table 6, p. 9, row 17 report
1203.15	eutectic: Liquid -> HfGe2 + (Ge)	HfGe2: Ge 0.666667, Hf 0.333333	experimental	[1] Tang 2014 cites Nowotny 1960	Table 6, p. 9, row 18 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, Ge–Hf system (20)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Hf2Ge	GeHf2	-98.47 kJ/mol-atom ± 10.8	298.15	experimental	-63.356 (mp-aaaaaosh)	-63.208 (oqmd-7794)	[1] Tang 2014 cites Golutvin 1979	Table 2, p. 3, row 4 report
Hf2Ge		-63.009 kJ/mol-atom	0	DFT			[1] Tang 2014	Table 2, p. 3, row 5 report
Hf2Ge	GeHf2	-62.62 kJ/mol-atom	298.15	model	-63.356 (mp-aaaaaosh)	-63.208 (oqmd-7794)	[1] Tang 2014	Table 2, p. 3, row 6 report
Hf3Ge	GeHf3	-56.392 kJ/mol-atom	298.15	model	-45.349 (mp-aaacqlam)	-45.623 (oqmd-2052547)	[1] Tang 2014	Table 2, p. 3, row 3 report
Hf3Ge		-45.435 kJ/mol-atom	0	DFT			[1] Tang 2014	Table 2, p. 3, row 2 report
Hf3Ge	GeHf3	-28.4 kJ/mol-atom ± 8.2	298.15	experimental	-45.349 (mp-aaacqlam)	-45.623 (oqmd-2052547)	[1] Tang 2014 cites Golutvin 1979	Table 2, p. 3, row 1 report
Hf3Ge2	Ge2Hf3	-74.6 kJ/mol-atom ± 7.9	1473	unspecified	-67.002 (mp-aaacdoez)	-67.277 (oqmd-30438)	[1] Tang 2014 cites Jung 1991 doi	Table 2, p. 3, row 11 report
Hf3Ge2		-67.105 kJ/mol-atom	0	DFT			[1] Tang 2014	Table 2, p. 3, row 12 report
Hf3Ge2	Ge2Hf3	-30.16 kJ/mol-atom ± 6.4	298.15	experimental	-67.002 (mp-aaacdoez)	-67.277 (oqmd-30438)	[1] Tang 2014 cites Golutvin 1979	Table 2, p. 3, row 10 report
Hf5Ge3		-65.588 kJ/mol-atom	0	DFT			[1] Tang 2014	Table 2, p. 3, row 8 report
Hf5Ge3	Ge3Hf5	-64.448 kJ/mol-atom	298.15	model	-65.411 (mp-aaaaacox)	-65.437 (oqmd-1340141)	[1] Tang 2014	Table 2, p. 3, row 9 report
Hf5Ge3	Ge3Hf5	-42.31 kJ/mol-atom ± 4.1	298.15	experimental	-65.411 (mp-aaaaacox)	-65.437 (oqmd-1340141)	[1] Tang 2014 cites Golutvin 1979	Table 2, p. 3, row 7 report
Hf5Ge4	Ge4Hf5	-67.927 kJ/mol-atom	298.15	model	-68.037 (mp-aaaaabcj)	-68.008 (oqmd-13721)	[1] Tang 2014	Table 2, p. 3, row 15 report
Hf5Ge4		-67.91 kJ/mol-atom	0	DFT			[1] Tang 2014 cites Ponweiser 2009 doi	Table 2, p. 3, row 13 report
Hf5Ge4		-67.87 kJ/mol-atom	0	DFT			[1] Tang 2014	Table 2, p. 3, row 14 report
HfGe2	Ge2Hf	-69.666 kJ/mol-atom	298.15	model	-45.563 (mp-aaaaaugh)	-45.659 (oqmd-3543)	[1] Tang 2014 cites Smith 1957 doi	Table 2, p. 3, row 16 report
HfGe2	Ge2Hf	-67.069 kJ/mol-atom ± 3.37	298.15	experimental	-45.563 (mp-aaaaaugh)	-45.659 (oqmd-3543)	[1] Tang 2014	Table 2, p. 3, row 17 report
HfGe2	Ge2Hf	-64.907 kJ/mol-atom	298.15	model	-45.563 (mp-aaaaaugh)	-45.659 (oqmd-3543)	[1] Tang 2014	Table 2, p. 3, row 19 report
HfGe2	Ge2Hf	-55.666 kJ/mol-atom	298.15	model	-45.563 (mp-aaaaaugh)	-45.659 (oqmd-3543)	[1] Tang 2014 cites Smith 1957 doi	Table 2, p. 3, row 16 report
HfGe2		-46.03 kJ/mol-atom	298.15	DFT			[1] Tang 2014	Table 2, p. 3, row 18 report

Other properties

Phase transition (1)

Phase transition, Ge–Hf system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1205.75 K	1205.75	Liquid $ HfGe2 ? (Ge)	experimental	[1] Tang 2014	p. 8 report	Therefore, the temperature for Liquid $ HfGe2 ? (Ge) is at 932.6 ± 2.3 °C according to the average value of these five temperatures.

Phase equilibrium (15)

Phase equilibrium, Ge–Hf system
Property	T (K)	Phases / composition	Class	Source	Location
Phase assemblage		(Hf) + Hf3Ge alloy: Ge 0.1, Hf 0.9	experimental	[1] Tang 2014	Table 3, p. 4, row 1 report
Phase assemblage		Hf2Ge + Hf3Ge alloy: Ge 0.29, Hf 0.71	experimental	[1] Tang 2014	Table 3, p. 4, row 3 report
Phase assemblage		Hf5Ge3 + Hf5Ge4 alloy: Ge 0.42, Hf 0.58	experimental	[1] Tang 2014	Table 3, p. 4, row 6 report
Phase assemblage		HfGe2 + Hf5Ge4 alloy: Ge 0.5, Hf 0.5	experimental	[1] Tang 2014	Table 3, p. 4, row 8 report
Phase assemblage	1073.15	HfGe2 + (Ge) alloy: Ge 0.8, Hf 0.2	experimental	[1] Tang 2014	Table 3, p. 4, row 11 report
Phase assemblage	1073.15	HfGe2 + (Ge) alloy: Ge 0.98, Hf 0.02	experimental	[1] Tang 2014	Table 3, p. 4, row 15 report
Phase assemblage	1073.15	HfGe2 + (Ge) alloy: Ge 0.95, Hf 0.05	experimental	[1] Tang 2014	Table 3, p. 4, row 14 report
Phase assemblage	1073.15	HfGe2 + (Ge) alloy: Ge 0.9, Hf 0.1	experimental	[1] Tang 2014	Table 3, p. 4, row 13 report
Phase assemblage	1073.15	HfGe2 + (Ge) alloy: Ge 0.85, Hf 0.15	experimental	[1] Tang 2014	Table 3, p. 4, row 12 report
Phase assemblage	1073.15	HfGe2 + Hf5Ge4 alloy: Ge 0.6, Hf 0.4	experimental	[1] Tang 2014	Table 3, p. 4, row 9 report
Phase assemblage	1173.15	Hf3Ge alloy: Ge 0.25, Hf 0.75	experimental	[1] Tang 2014	Table 3, p. 4, row 2 report
Phase assemblage	1173.15	HfGe2 alloy: Ge 0.667, Hf 0.333	experimental	[1] Tang 2014	Table 3, p. 4, row 10 report
Phase assemblage	1373.15	Hf2Ge + Hf5Ge3 alloy: Ge 0.365, Hf 0.635	experimental	[1] Tang 2014	Table 3, p. 4, row 4 report
Phase assemblage	1373.15	Hf5Ge3 + Hf5Ge4 alloy: Ge 0.385, Hf 0.615	experimental	[1] Tang 2014	Table 3, p. 4, row 5 report
Phase assemblage	1373.15	HfGe2 + Hf5Ge4 alloy: Ge 0.465, Hf 0.535	experimental	[1] Tang 2014	Table 3, p. 4, row 7 report

Crystal structure (43)

Crystal structure, Ge–Hf system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	5.651 Å		(Ge) alloy: Hf 0	unspecified	[1] Tang 2014	Table 4, p. 5, row 8 report
Lattice a	6.609 Å		Hf2Ge alloy: Hf 0.666667	unspecified	[1] Tang 2014	Table 4, p. 5, row 14 report
Lattice a	10.953 Å		Hf3Ge alloy: Hf 0.75	unspecified	[1] Tang 2014	Table 4, p. 5, row 11 report
Lattice a	7.156 Å		Hf3Ge2 alloy: Hf 0.6	unspecified	[1] Tang 2014	Table 4, p. 5, row 19 report
Lattice a	7.991 Å		Hf5Ge3 alloy: Hf 0.625	unspecified	[1] Tang 2014	Table 4, p. 5, row 17 report
Lattice a	7.056 Å		Hf5Ge4 alloy: Hf 0.555556	unspecified	[1] Tang 2014	Table 4, p. 5, row 22 report
Lattice a	3.833 Å		HfGe2 alloy: Hf 0.333333	unspecified	[1] Tang 2014	Table 4, p. 5, row 25 report
Lattice a	5.651 Å	298.15	(Ge) alloy: Hf 0	experimental	[1] Tang 2014 cites Qadri 1983 doi	Table 4, p. 5, row 6 report
Lattice a	6.577 Å	298.15	Hf2Ge alloy: Hf 0.666667	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 12 report
Lattice a	10.901 Å	298.15	Hf3Ge alloy: Hf 0.75	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 9 report
Lattice a	7.06 Å	298.15	Hf3Ge2 alloy: Hf 0.6	experimental	[1] Tang 2014 cites Rossteutscher 1965	Table 4, p. 5, row 18 report
Lattice a	7.938 Å	298.15	Hf5Ge3 alloy: Hf 0.625	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 15 report
Lattice a	6.995 Å	298.15	Hf5Ge4 alloy: Hf 0.555556	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 20 report
Lattice a	3.791 Å	298.15	HfGe2 alloy: Hf 0.333333	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 23 report
Lattice a	5.663 Å	1073.15	(Ge) alloy: Hf 0	experimental	[1] Tang 2014	Table 4, p. 5, row 7 report
Lattice a	6.592 Å	1373.15	Hf2Ge alloy: Hf 0.666667	experimental	[1] Tang 2014	Table 4, p. 5, row 13 report
Lattice a	10.908 Å	1373.15	Hf3Ge alloy: Hf 0.75	experimental	[1] Tang 2014	Table 4, p. 5, row 10 report
Lattice a	7.912 Å	1373.15	Hf5Ge3 alloy: Hf 0.625	experimental	[1] Tang 2014	Table 4, p. 5, row 16 report
Lattice a	7.003 Å	1373.15	Hf5Ge4 alloy: Hf 0.555556	experimental	[1] Tang 2014	Table 4, p. 5, row 21 report
Lattice a	3.841 Å	1373.15	HfGe2 alloy: Hf 0.333333	experimental	[1] Tang 2014	Table 4, p. 5, row 24 report
Lattice b	13.475 Å		Hf5Ge4 alloy: Hf 0.555556	unspecified	[1] Tang 2014	Table 4, p. 5, row 22 report
Lattice b	14.927 Å		HfGe2 alloy: Hf 0.333333	unspecified	[1] Tang 2014	Table 4, p. 5, row 25 report
Lattice b	13.389 Å	298.15	Hf5Ge4 alloy: Hf 0.555556	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 20 report
Lattice b	14.863 Å	298.15	HfGe2 alloy: Hf 0.333333	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 23 report
Lattice b	13.389 Å	1373.15	Hf5Ge4 alloy: Hf 0.555556	experimental	[1] Tang 2014	Table 4, p. 5, row 21 report
Lattice b	14.905 Å	1373.15	HfGe2 alloy: Hf 0.333333	experimental	[1] Tang 2014	Table 4, p. 5, row 24 report
Lattice c	5.316 Å		Hf2Ge alloy: Hf 0.666667	unspecified	[1] Tang 2014	Table 4, p. 5, row 14 report
Lattice c	5.421 Å		Hf3Ge alloy: Hf 0.75	unspecified	[1] Tang 2014	Table 4, p. 5, row 11 report
Lattice c	3.697 Å		Hf3Ge2 alloy: Hf 0.6	unspecified	[1] Tang 2014	Table 4, p. 5, row 19 report
Lattice c	5.541 Å		Hf5Ge3 alloy: Hf 0.625	unspecified	[1] Tang 2014	Table 4, p. 5, row 17 report
Lattice c	7.128 Å		Hf5Ge4 alloy: Hf 0.555556	unspecified	[1] Tang 2014	Table 4, p. 5, row 22 report
Lattice c	3.799 Å		HfGe2 alloy: Hf 0.333333	unspecified	[1] Tang 2014	Table 4, p. 5, row 25 report
Lattice c	5.274 Å	298.15	Hf2Ge alloy: Hf 0.666667	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 12 report
Lattice c	5.41 Å	298.15	Hf3Ge alloy: Hf 0.75	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 9 report
Lattice c	3.72 Å	298.15	Hf3Ge2 alloy: Hf 0.6	experimental	[1] Tang 2014 cites Rossteutscher 1965	Table 4, p. 5, row 18 report
Lattice c	5.549 Å	298.15	Hf5Ge3 alloy: Hf 0.625	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 15 report
Lattice c	7.077 Å	298.15	Hf5Ge4 alloy: Hf 0.555556	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 20 report
Lattice c	3.754 Å	298.15	HfGe2 alloy: Hf 0.333333	experimental	[1] Tang 2014 cites Kotur 1991	Table 4, p. 5, row 23 report
Lattice c	5.306 Å	1373.15	Hf2Ge alloy: Hf 0.666667	experimental	[1] Tang 2014	Table 4, p. 5, row 13 report
Lattice c	5.401 Å	1373.15	Hf3Ge alloy: Hf 0.75	experimental	[1] Tang 2014	Table 4, p. 5, row 10 report
Lattice c	5.545 Å	1373.15	Hf5Ge3 alloy: Hf 0.625	experimental	[1] Tang 2014	Table 4, p. 5, row 16 report
Lattice c	7.091 Å	1373.15	Hf5Ge4 alloy: Hf 0.555556	experimental	[1] Tang 2014	Table 4, p. 5, row 21 report
Lattice c	3.798 Å	1373.15	HfGe2 alloy: Hf 0.333333	experimental	[1] Tang 2014	Table 4, p. 5, row 24 report

Sources

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

Ying Tang, Biao Hu, Jiong Wang, Yong Du, Kaiming Cheng, Dandan Liu et al., Experimental investigation and thermodynamic assessment of the Hf–Ge system, J Mater Sci 49, 1306-1316 (2014). doi:10.1007/s10853-013-7814-7

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
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 the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); 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). 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_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@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}
}