EuMgGe

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-867152 · Space group: Pnma (#62)

Materials Project API

Basic Information

Formula

EuMgGe

MP-ID

mp-867152

Elements

Sites

Density

5.6456

g/cm³

Volume

292.85

Å³

Cell a

4.5344

Cell b

7.6335

Cell c

8.4606

α Angle

90.00

β Angle

90.00

γ Angle

90.00

Space Group

Pnma

Point Group

mmm

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
15.64	5.6676	11.6	(0,1,-1)
15.64	5.6676	11.6	(0,1,1)
21.00	4.2303	20.6	(0,0,2)
22.24	3.9966	47.6	(1,0,1)
23.31	3.8168	16.5	(0,2,0)
24.05	3.7001	6.7	(0,1,-2)
24.05	3.7001	6.7	(0,1,2)
25.15	3.5407	11.6	(1,1,-1)
25.15	3.5407	11.6	(1,1,1)
25.60	3.4791	3.6	(0,2,-1)
25.60	3.4791	3.6	(0,2,1)
30.62	2.9200	4.3	(1,2,0)
31.20	2.8668	61.3	(1,1,-2)
31.20	2.8668	61.3	(1,1,2)
31.57	2.8338	21.0	(0,2,-2)
31.57	2.8338	21.0	(0,2,2)
32.44	2.7602	100.0	(1,2,-1)
32.44	2.7602	100.0	(1,2,1)
33.89	2.6454	27.4	(0,1,-3)
33.89	2.6454	27.4	(0,1,3)
36.89	2.4367	12.1	(0,3,-1)
36.89	2.4367	12.1	(0,3,1)
37.56	2.3948	36.0	(1,0,3)
39.44	2.2850	6.4	(1,1,-3)

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Energy Properties

Formation Energy/atom

-0.56231

eV/atom

Energy/atom

-6.07618

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-19.5136

eV/atom

Volume/atom

24.40

Å³

c/a Ratio

1.8659

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

28.0000

μB

Mag. Ordering

Unknown

Mag. Sites

Magnetization/Volume

0.095610

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

0.6751

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

15.707%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.3587

smaller = more stable mixing

VEC

4.333

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-14.583

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 (2)

aaadrkvw aaaektpk

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-867152

Reference Citation

The crystal structure and related material properties of EuMgGe were obtained from the Materials Project database (MP-ID: mp-867152, 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_EuMgGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.53434880
_cell_length_b   7.63350454
_cell_length_c   8.46055774
_cell_angle_alpha   90.00029168
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   EuMgGe
_chemical_formula_sum   'Eu4 Mg4 Ge4'
_cell_volume   292.84504943
_cell_formula_units_Z   4
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  0.25000000  0.98213071  0.68265663  1.0
  Eu  Eu1  1  0.25000000  0.48212725  0.81734571  1.0
  Eu  Eu2  1  0.75000000  0.51786886  0.18267413  1.0
  Eu  Eu3  1  0.75000000  0.01787084  0.31732441  1.0
  Mg  Mg4  1  0.75000000  0.64398056  0.56395942  1.0
  Mg  Mg5  1  0.75000000  0.14398151  0.93604017  1.0
  Mg  Mg6  1  0.25000000  0.85602164  0.06397147  1.0
  Mg  Mg7  1  0.25000000  0.35602226  0.43603035  1.0
  Ge  Ge8  1  0.75000000  0.27562572  0.61110967  1.0
  Ge  Ge9  1  0.75000000  0.77562471  0.88889131  1.0
  Ge  Ge10  1  0.25000000  0.22437505  0.11114916  1.0
  Ge  Ge11  1  0.25000000  0.72436890  0.38884658  1.0

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