Eu(GaSb)2

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-945228 · Space group: Pnma (#62)

Materials Project API

Basic Information

Formula

Eu(GaSb)2

MP-ID

mp-945228

Elements

Sites

Density

6.6639

g/cm³

Volume

533.18

Å³

Cell a

4.3483

Cell b

6.7156

Cell c

18.2586

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
14.05	6.3028	3.6	(0,1,1)
16.39	5.4096	10.1	(0,1,2)
19.45	4.5647	1.4	(0,0,4)
19.69	4.5097	3.4	(0,1,3)
22.65	3.9258	3.5	(1,0,2)
24.39	3.6500	19.3	(1,1,0)
26.30	3.3892	38.9	(1,1,2)
26.55	3.3578	1.7	(0,2,0)
27.81	3.2081	5.1	(0,1,5)
28.32	3.1514	50.5	(0,2,2)
28.35	3.1484	40.6	(1,0,4)
28.52	3.1302	29.7	(1,1,3)
29.35	3.0431	3.2	(0,0,6)
30.40	2.9400	6.3	(0,2,3)
31.38	2.8507	61.8	(1,1,4)
32.30	2.7718	70.5	(0,1,6)
33.12	2.7048	11.4	(0,2,4)
34.09	2.6299	2.0	(1,2,1)
35.17	2.5517	100.0	(1,2,2)
36.02	2.4932	33.9	(1,0,6)
36.91	2.4356	4.9	(1,2,3)
38.52	2.3373	14.6	(1,1,6)
39.23	2.2967	1.1	(1,2,4)
39.98	2.2549	1.4	(0,2,6)

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Energy Properties

Formation Energy/atom

-0.56887

eV/atom

Energy/atom

-5.48933

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-23.1662

eV/atom

Volume/atom

26.66

Å³

c/a Ratio

4.1990

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

27.9406

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.052400

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Ga · 0.400

Element Family

PostTransition-Noble

Solute Fraction

0.600

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.0549

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

8.7706

J/mol·K

Ω Parameter

0.6991

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

12.448%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.3111

smaller = more stable mixing

VEC

4.600

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-8.813

kJ/mol; negative = exothermic mixing

Entropy Norm

0.9602

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.441

Family

Ga-rich Multi-Component

Matrix Element

Ga · 0.400

Related Tasks

Related computation task IDs (4)

aaadnqnv aaadwozx aaaetueh aaagaksi

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-945228

Reference Citation

The crystal structure and related material properties of Eu(GaSb)2 were obtained from the Materials Project database (MP-ID: mp-945228, 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_Eu(GaSb)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.34833245
_cell_length_b   6.71559364
_cell_length_c   18.25863421
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu(GaSb)2
_chemical_formula_sum   'Eu4 Ga8 Sb8'
_cell_volume   533.18194890
_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  0.75000000  0.73182108  0.38421300  1.0
  Eu  Eu1  1  0.75000000  0.76817892  0.88421300  1.0
  Eu  Eu2  1  0.25000000  0.26817892  0.61578700  1.0
  Eu  Eu3  1  0.25000000  0.23182108  0.11578700  1.0
  Ga  Ga4  1  0.75000000  0.54840402  0.20796110  1.0
  Ga  Ga5  1  0.75000000  0.95159598  0.70796110  1.0
  Ga  Ga6  1  0.25000000  0.45159598  0.79203890  1.0
  Ga  Ga7  1  0.25000000  0.04840402  0.29203890  1.0
  Ga  Ga8  1  0.75000000  0.93905650  0.57072780  1.0
  Ga  Ga9  1  0.75000000  0.56094350  0.07072780  1.0
  Ga  Ga10  1  0.25000000  0.06094350  0.42927220  1.0
  Ga  Ga11  1  0.25000000  0.43905650  0.92927220  1.0
  Sb  Sb12  1  0.75000000  0.94813033  0.21277926  1.0
  Sb  Sb13  1  0.75000000  0.55186967  0.71277926  1.0
  Sb  Sb14  1  0.25000000  0.05186967  0.78722074  1.0
  Sb  Sb15  1  0.25000000  0.44813033  0.28722074  1.0
  Sb  Sb16  1  0.75000000  0.26854314  0.46985110  1.0
  Sb  Sb17  1  0.75000000  0.23145686  0.96985110  1.0
  Sb  Sb18  1  0.25000000  0.73145686  0.53014890  1.0
  Sb  Sb19  1  0.25000000  0.76854314  0.03014890  1.0

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