Eu3(GaNi)4

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-636287 · Space group: I-43m (#217)

Materials Project API

Basic Information

Formula

Eu3(GaNi)4

MP-ID

mp-636287

Elements

Sites

Density

7.8841

g/cm³

Volume

204.21

Å³

Cell a

6.4254

Cell b

6.4254

Cell c

6.4254

α Angle

109.47

β Angle

109.47

γ Angle

109.47

Space Group

I-43m

Point Group

-43m

Crystal System

Cubic

Bravais Lattice

Stability

Yes

Packing Fraction

0.6802

X-ray Diffraction

Diffraction Pattern

Target / Radiation

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

Diffraction Peaks (Top 20)

2θ	d (Å)	I	hkl
23.99	3.7097	17.4	(1,1,-1)
29.49	3.0290	22.7	(1,1,0)
34.18	2.6232	100.0	(2,0,0)
38.37	2.3462	47.0	(2,1,-1)
42.19	2.1418	12.7	(1,1,1)
45.76	1.9829	25.7	(2,1,0)
49.12	1.8549	3.0	(2,2,-2)
52.31	1.7488	23.7	(2,2,-1)
55.38	1.6590	19.9	(3,1,-1)
58.33	1.5818	11.2	(2,1,1)
61.20	1.5145	23.9	(2,2,0)
63.99	1.4551	6.1	(3,1,0)
69.38	1.3546	7.7	(3,2,-1)
72.00	1.3116	14.4	(4,0,0)
74.58	1.2724	6.5	(2,2,1)
77.14	1.2366	15.0	(3,1,1)
79.66	1.2036	7.4	(3,2,0)
82.17	1.1731	5.1	(4,2,-2)
87.14	1.1185	14.1	(3,3,-1)
89.61	1.0939	2.1	(4,2,-1)

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Energy Properties

Formation Energy/atom

-0.49800

eV/atom

Energy/atom

-19.52169

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-19.5217

eV/atom

Volume/atom

18.56

Å³

c/a Ratio

1.0000

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

21.0195

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.102930

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Ga · 0.364

Element Family

PostTransition-Noble

Solute Fraction

0.636

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.0901

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

9.0628

J/mol·K

Ω Parameter

0.8895

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

17.394%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.2970

smaller = more stable mixing

VEC

6.636

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-10.579

kJ/mol; negative = exothermic mixing

Entropy Norm

0.9922

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.409

Family

Ga-rich Multi-Component

Matrix Element

Ga · 0.364

Related Tasks

Related computation task IDs (5)

aaadmxao aaadrkae aaaetzyx aaafcscn aaagabig

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-636287

Reference Citation

The crystal structure and related material properties of Eu3(GaNi)4 were obtained from the Materials Project database (MP-ID: mp-636287, 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_Eu3(GaNi)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.42537367
_cell_length_b   6.42537367
_cell_length_c   6.42537367
_cell_angle_alpha   109.47122063
_cell_angle_beta   109.47122063
_cell_angle_gamma   109.47122063
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu3(GaNi)4
_chemical_formula_sum   'Eu3 Ga4 Ni4'
_cell_volume   204.20824730
_cell_formula_units_Z   1
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  0.50000000  0.00000000  0.50000000  1.0
  Eu  Eu1  1  -0.00000000  0.50000000  0.50000000  1.0
  Eu  Eu2  1  0.50000000  0.50000000  -0.00000000  1.0
  Ga  Ga3  1  0.00000000  -0.00000000  0.60885766  1.0
  Ga  Ga4  1  0.39114234  0.39114234  0.39114234  1.0
  Ga  Ga5  1  0.00000000  0.60885766  -0.00000000  1.0
  Ga  Ga6  1  0.60885766  -0.00000000  0.00000000  1.0
  Ni  Ni7  1  -0.00000000  0.00000000  0.24280942  1.0
  Ni  Ni8  1  0.75719058  0.75719058  0.75719058  1.0
  Ni  Ni9  1  0.24280942  0.00000000  0.00000000  1.0
  Ni  Ni10  1  -0.00000000  0.24280942  -0.00000000  1.0

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