Eu2Cr2O5

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1076286 · Space group: Ima2 (#46)

Materials Project API

Basic Information

Formula

Eu2Cr2O5

MP-ID

mp-1076286

Elements

Sites

Density

6.6763

g/cm³

Volume

242.71

Å³

Cell a

8.8005

Cell b

8.8005

Cell c

8.8005

α Angle

143.64

β Angle

142.82

γ Angle

52.98

Space Group

Ima2

Point Group

mm2

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
11.23	7.8764	13.2	(1,1,-1)
22.58	3.9382	12.1	(2,2,-2)
22.66	3.9248	29.8	(0,0,1)
23.20	3.8339	2.3	(2,1,-1)
25.35	3.5128	3.6	(1,1,0)
31.90	2.8054	33.8	(1,-1,1)
32.20	2.7800	100.0	(2,2,-1)
32.60	2.7471	1.3	(3,2,-2)
32.61	2.7460	34.6	(1,-1,-1)
34.15	2.6255	3.8	(3,3,-3)
39.44	2.2849	13.1	(3,1,-1)
40.03	2.2525	13.1	(1,3,-1)
40.40	2.2325	1.4	(1,2,0)
41.38	2.1822	14.0	(3,3,-2)
46.10	1.9691	11.9	(4,4,-4)
46.26	1.9624	30.5	(0,0,2)
47.43	1.9169	4.5	(4,2,-2)
47.76	1.9042	2.6	(1,1,1)
47.94	1.8977	4.8	(2,4,-2)
51.63	1.7704	4.0	(1,-1,2)
51.90	1.7618	2.2	(3,0,0)
51.96	1.7600	2.4	(4,4,-3)
52.07	1.7564	7.2	(2,2,0)
52.59	1.7404	3.5	(1,-1,-2)

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Energy Properties

Formation Energy/atom

-1.26142

eV/atom

Energy/atom

-8.44165

eV/atom

Energy above Hull

1.5291

eV/atom

Uncorrected Energy

-7.6158

eV/atom

Volume/atom

13.48

Å³

c/a Ratio

1.0000

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

2.2885

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.009430

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

O · 0.556

Element Family

Metalloid-Nonmetal

Solute Fraction

0.444

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.9950

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

8.2727

J/mol·K

Ω Parameter

0.0000

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

50.130%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

1.0105

smaller = more stable mixing

VEC

5.111

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

0.000

kJ/mol; negative = exothermic mixing

Entropy Norm

0.9057

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.303

Family

O-rich Multi-Component

Matrix Element

O · 0.556

Related Tasks

Related computation task IDs (2)

aaacjgfo aaacyosk

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1076286

Reference Citation

The crystal structure and related material properties of Eu2Cr2O5 were obtained from the Materials Project database (MP-ID: mp-1076286, 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_Eu2Cr2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.80050116
_cell_length_b   8.80050116
_cell_length_c   8.80050116
_cell_angle_alpha   143.63652400
_cell_angle_beta   142.82230764
_cell_angle_gamma   52.98406102
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu2Cr2O5
_chemical_formula_sum   'Eu4 Cr4 O10'
_cell_volume   242.70950247
_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  0.87594400  0.38432100  0.48011000  1.0
  Eu  Eu1  1  0.12405600  0.60416600  0.50837800  1.0
  Eu  Eu2  1  0.40421200  0.88432100  0.50837800  1.0
  Eu  Eu3  1  0.59578800  0.10416600  0.48011000  1.0
  Cr  Cr4  1  0.00000000  0.99028300  0.99028300  1.0
  Cr  Cr5  1  0.50000000  0.49028300  0.99028300  1.0
  Cr  Cr6  1  0.79544800  0.77440300  0.06985100  1.0
  Cr  Cr7  1  0.20455200  0.27440300  0.97895500  1.0
  O  O8  1  0.75897700  0.75613500  0.48901900  1.0
  O  O9  1  0.24102300  0.73004200  0.99715800  1.0
  O  O10  1  0.76711600  0.25613500  0.99715800  1.0
  O  O11  1  0.23288400  0.23004200  0.48901900  1.0
  O  O12  1  0.81816600  0.84764800  0.92492600  1.0
  O  O13  1  0.18183400  0.10676000  0.02948100  1.0
  O  O14  1  0.42272200  0.34764800  0.02948100  1.0
  O  O15  1  0.57727800  0.60676000  0.92492600  1.0
  O  O16  1  0.85786700  0.14224200  0.50010800  1.0
  O  O17  1  0.14213300  0.64224200  0.28437500  1.0

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