Eu2(Ga3Rh)3

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-645591 · Space group: Cmcm (#63)

Materials Project API

Basic Information

Formula

Eu2(Ga3Rh)3

MP-ID

mp-645591

Elements

Sites

Density

8.5663

g/cm³

Volume

480.80

Å³

Cell a

7.5135

Cell b

7.5135

Cell c

9.7783

α Angle

90.00

β Angle

90.00

γ Angle

119.43

Space Group

Cmcm

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
18.14	4.8892	2.8	(0,0,0,2)
25.21	3.5332	5.7	(1,1,-2,1)
25.40	3.5067	11.2	(2,-1,-1,1)
27.25	3.2721	2.1	(2,0,-2,0)
27.49	3.2440	5.6	(2,-2,0,0)
28.77	3.1030	12.3	(2,0,-2,1)
29.83	2.9950	9.3	(1,1,-2,2)
30.00	2.9788	19.6	(2,-1,-1,2)
30.64	2.9176	1.1	(1,0,-1,3)
32.94	2.7193	3.4	(2,0,-2,2)
33.14	2.7031	9.3	(2,-2,0,2)
36.23	2.4796	8.0	(2,1,-3,0)
36.36	2.4710	49.1	(1,1,-2,3)
36.50	2.4619	100.0	(2,-1,-1,3)
36.60	2.4553	5.1	(3,-2,-1,0)
36.76	2.4446	35.0	(0,0,0,4)
37.42	2.4035	4.2	(2,1,-3,1)
37.64	2.3896	18.3	(3,-1,-2,1)
37.78	2.3813	2.6	(3,-2,-1,1)
39.00	2.3092	5.5	(2,0,-2,3)
40.80	2.2115	13.4	(2,1,-3,2)
41.14	2.1941	14.2	(3,-2,-1,2)
41.39	2.1814	84.5	(3,0,-3,0)
41.77	2.1627	41.2	(3,-3,0,0)

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Energy Properties

Formation Energy/atom

-0.63386

eV/atom

Energy/atom

-5.62829

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-18.7118

eV/atom

Volume/atom

17.17

Å³

c/a Ratio

1.3014

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

28.1477

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.058540

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Ga · 0.643

Element Family

PostTransition-Noble

Solute Fraction

0.357

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.8921

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

7.4171

J/mol·K

Ω Parameter

1.7288

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

12.392%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.3167

smaller = more stable mixing

VEC

4.857

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-3.566

kJ/mol; negative = exothermic mixing

Entropy Norm

0.8120

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.577

Family

Ga-rich Multi-Component

Matrix Element

Ga · 0.643

Related Tasks

Related computation task IDs (2)

aaadvzcn aaagacac

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-645591

Reference Citation

The crystal structure and related material properties of Eu2(Ga3Rh)3 were obtained from the Materials Project database (MP-ID: mp-645591, 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_Eu2(Ga3Rh)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.51353140
_cell_length_b   7.51353140
_cell_length_c   9.77832706
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   119.42746483
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu2(Ga3Rh)3
_chemical_formula_sum   'Eu4 Ga18 Rh6'
_cell_volume   480.79523266
_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  0.66979171  0.99843605  0.25000000  1.0
  Eu  Eu1  1  0.00156395  0.33020829  0.75000000  1.0
  Eu  Eu2  1  0.99843605  0.66979171  0.25000000  1.0
  Eu  Eu3  1  0.33020829  0.00156395  0.75000000  1.0
  Ga  Ga4  1  0.66495942  0.99358466  0.92845700  1.0
  Ga  Ga5  1  0.13110335  0.13110335  0.25000000  1.0
  Ga  Ga6  1  0.00641534  0.33504058  0.42845700  1.0
  Ga  Ga7  1  0.33737933  0.33737933  0.55870830  1.0
  Ga  Ga8  1  0.33585193  0.54350092  0.25000000  1.0
  Ga  Ga9  1  0.45649908  0.66414807  0.75000000  1.0
  Ga  Ga10  1  0.86889665  0.86889665  0.75000000  1.0
  Ga  Ga11  1  0.66262067  0.66262067  0.05870830  1.0
  Ga  Ga12  1  0.66262067  0.66262067  0.44129170  1.0
  Ga  Ga13  1  0.99358466  0.66495942  0.57154300  1.0
  Ga  Ga14  1  0.99358466  0.66495942  0.92845700  1.0
  Ga  Ga15  1  0.33504058  0.00641534  0.42845700  1.0
  Ga  Ga16  1  0.66414807  0.45649908  0.75000000  1.0
  Ga  Ga17  1  0.54350092  0.33585193  0.25000000  1.0
  Ga  Ga18  1  0.33737933  0.33737933  0.94129170  1.0
  Ga  Ga19  1  0.33504058  0.00641534  0.07154300  1.0
  Ga  Ga20  1  0.66495942  0.99358466  0.57154300  1.0
  Ga  Ga21  1  0.00641534  0.33504058  0.07154300  1.0
  Rh  Rh22  1  0.32896386  0.67103614  0.50000000  1.0
  Rh  Rh23  1  0.32896386  0.67103614  -0.00000000  1.0
  Rh  Rh24  1  0.67103614  0.32896386  0.50000000  1.0
  Rh  Rh25  1  -0.00000000  -0.00000000  -0.00000000  1.0
  Rh  Rh26  1  -0.00000000  -0.00000000  0.50000000  1.0
  Rh  Rh27  1  0.67103614  0.32896386  -0.00000000  1.0

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