EuDy2Ga8Ag3

High-Entropy Materials HEA

MP-ID: mp-3294489 · Space group: Immm (#71)

Materials Project API

Basic Information

Formula

EuDy2Ga8Ag3

MP-ID

mp-3294489

Elements

Sites

Density

8.4308

g/cm³

Volume

267.54

Å³

Cell a

4.2923

Cell b

8.3683

Cell c

8.3683

α Angle

69.54

β Angle

75.14

γ Angle

75.14

Space Group

Immm

Point Group

mmm

Crystal System

Orthorhombic

Bravais Lattice

Stability

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
11.48	7.7062	4.0	(0,1,0)
18.59	4.7722	1.6	(0,1,-1)
22.45	3.9611	1.1	(0,2,1)
22.72	3.9146	5.5	(1,1,0)
23.08	3.8531	1.2	(0,2,0)
27.31	3.2653	1.1	(0,2,2)
28.80	3.1001	6.6	(1,2,0)
28.88	3.0911	1.1	(0,2,-1)
29.22	3.0566	4.9	(1,2,2)
29.22	3.0566	4.9	(1,-1,-1)
33.25	2.6949	12.3	(0,3,1)
34.86	2.5739	100.0	(1,3,1)
34.93	2.5687	19.6	(0,3,0)
35.11	2.5559	18.1	(1,2,-1)
35.63	2.5196	4.2	(0,3,2)
35.81	2.5075	7.5	(1,3,2)
35.81	2.5075	7.5	(1,-1,-2)
37.70	2.3861	7.0	(0,2,-2)
37.80	2.3801	28.4	(1,3,0)
40.42	2.2315	3.5	(1,3,3)
40.42	2.2315	3.5	(1,-2,-2)
41.48	2.1769	21.6	(0,3,3)
42.10	2.1461	33.5	(2,1,1)
43.97	2.0594	9.6	(1,3,-1)

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Energy Properties

Formation Energy/atom

-0.23516

eV/atom

Energy/atom

-18.67047

eV/atom

Energy above Hull

0.2747

eV/atom

Uncorrected Energy

-18.6705

eV/atom

Volume/atom

19.11

Å³

c/a Ratio

1.9496

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

3.4706

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.012970

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Ga · 0.571

Element Family

PostTransition-Noble

Solute Fraction

0.429

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.1164

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

9.2815

J/mol·K

Ω Parameter

0.9998

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

11.821%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.2626

smaller = more stable mixing

VEC

6.000

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-7.020

kJ/mol; negative = exothermic mixing

Entropy Norm

0.8053

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (1)

aaahflnd

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-3294489

Reference Citation

The crystal structure and related material properties of EuDy2Ga8Ag3 were obtained from the Materials Project database (MP-ID: mp-3294489, 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

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Raw CIF Data

# generated using pymatgen
data_EuDy2Ga8Ag3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.29226404
_cell_length_b   8.36831254
_cell_length_c   8.36831291
_cell_angle_alpha   69.53886466
_cell_angle_beta   75.13991606
_cell_angle_gamma   75.13991610
_symmetry_Int_Tables_number   1
_chemical_formula_structural   EuDy2Ga8Ag3
_chemical_formula_sum   'Eu1 Dy2 Ga8 Ag3'
_cell_volume   267.54120659
_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  0.50000000  0.50000000  1.0
  Dy  Dy1  1  0.80163856  0.19836144  0.19836144  1.0
  Dy  Dy2  1  0.19836144  0.80163856  0.80163856  1.0
  Ga  Ga3  1  0.64521229  0.07366902  0.63590640  1.0
  Ga  Ga4  1  0.35478771  0.92633098  0.36409360  1.0
  Ga  Ga5  1  0.64521229  0.63590640  0.07366902  1.0
  Ga  Ga6  1  0.35478771  0.36409360  0.92633098  1.0
  Ga  Ga7  1  0.83830644  0.79387400  0.52951312  1.0
  Ga  Ga8  1  0.16169356  0.20612600  0.47048688  1.0
  Ga  Ga9  1  0.83830644  0.52951312  0.79387400  1.0
  Ga  Ga10  1  0.16169356  0.47048688  0.20612600  1.0
  Ag  Ag11  1  0.50000000  0.00000000  0.00000000  1.0
  Ag  Ag12  1  0.00000000  0.80488869  0.19511131  1.0
  Ag  Ag13  1  1.00000000  0.19511131  0.80488869  1.0

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