EuGeAu

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-9293 · Space group: Imm2 (#44)

Materials Project API

Basic Information

Formula

EuGeAu

MP-ID

mp-9293

Elements

Sites

Density

10.4407

g/cm³

Volume

134.10

Å³

Cell a

5.8750

Cell b

5.8728

Cell c

5.8728

α Angle

133.89

β Angle

102.04

γ Angle

95.63

Space Group

Imm2

Point Group

mm2

Crystal System

Orthorhombic

Bravais Lattice

Stability

Yes

Packing Fraction

X-ray Diffraction

Diffraction Pattern

Target / Radiation

X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å

Diffraction Peaks (Top 24)

2θ	d (Å)	I	hkl
16.43	5.3945	1.8	(1,0,0)
16.44	5.3921	1.8	(0,1,-1)
22.37	3.9740	30.2	(0,1,0)
22.54	3.9446	15.2	(1,1,-1)
24.09	3.6950	7.9	(1,-1,1)
32.25	2.7756	18.4	(1,1,0)
32.26	2.7749	18.3	(0,2,-1)
33.10	2.7063	88.1	(1,0,1)
33.11	2.7057	88.1	(0,1,-2)
33.22	2.6973	39.7	(2,0,0)
33.23	2.6961	39.6	(0,2,-2)
36.25	2.4779	3.8	(2,1,-1)
36.26	2.4772	3.8	(1,2,-2)
38.27	2.3517	13.4	(2,-1,1)
38.28	2.3511	13.4	(1,-2,2)
39.17	2.3001	60.6	(1,-1,-1)
39.47	2.2830	100.0	(1,2,-1)
41.59	2.1716	1.1	(1,-1,2)
45.66	1.9870	5.1	(0,2,0)
46.02	1.9723	2.9	(2,2,-2)
46.51	1.9527	2.9	(0,0,2)
46.76	1.9425	5.7	(2,1,0)
46.78	1.9419	5.7	(0,3,-2)
47.80	1.9027	3.4	(2,0,1)

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Energy Properties

Formation Energy/atom

-0.73741

eV/atom

Energy/atom

-6.79908

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-35.1475

eV/atom

Volume/atom

22.35

Å³

c/a Ratio

0.9996

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

14.1395

μB

Mag. Ordering

Unknown

Mag. Sites

Magnetization/Volume

0.105440

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Eu · 0.333

Element Family

Lanthanide

Solute Fraction

0.667

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.0986

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

9.1339

J/mol·K

Ω Parameter

1.9339

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

16.545%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.5510

smaller = more stable mixing

VEC

7.333

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-5.742

kJ/mol; negative = exothermic mixing

Entropy Norm

1.0000

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.430

Family

Eu-rich Multi-Component

Matrix Element

Eu · 0.333

Related Tasks

Related computation task IDs (5)

aaadmiel aaaektwk aaaeunvw aaafawwc aaafwyfz

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-9293

Reference Citation

The crystal structure and related material properties of EuGeAu were obtained from the Materials Project database (MP-ID: mp-9293, database version v2026.04.13).

Literature Citation

Horton, M.K., Huck, P., Yang, R.X. et al. Accelerated data-driven materials science with the Materials Project. Nat. Mater. 24, 1522–1532 (2025). https://doi.org/10.1038/s41563-025-02272-0

3D Crystal Structure Rendering

Loading 3D structure…

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Raw CIF Data

# generated using pymatgen
data_EuGeAu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.87502280
_cell_length_b   5.87282467
_cell_length_c   5.87282467
_cell_angle_alpha   133.88528851
_cell_angle_beta   102.04018856
_cell_angle_gamma   95.62808297
_symmetry_Int_Tables_number   1
_chemical_formula_structural   EuGeAu
_chemical_formula_sum   'Eu2 Ge2 Au2'
_cell_volume   134.09707466
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Eu  Eu0  1  0.20391691  0.70395180  0.49996511  1.0
  Eu  Eu1  1  0.63089548  0.63087549  0.00001899  1.0
  Ge  Ge2  1  0.64602125  0.33356382  0.31245743  1.0
  Ge  Ge3  1  0.02119578  0.33364969  0.68754608  1.0
  Au  Au4  1  0.78414960  0.00186175  0.78228885  1.0
  Au  Au5  1  0.21948998  0.00176744  0.21772255  1.0

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