MgCr2O5

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1048137 · Space group: Pmmn (#59)

Materials Project API

Basic Information

Formula

MgCr2O5

MP-ID

mp-1048137

Elements

Sites

Density

3.5981

g/cm³

Volume

192.26

Å³

Cell a

3.4477

Cell b

4.8237

Cell c

11.5604

α Angle

90.00

β Angle

90.00

γ Angle

90.00

Space Group

Pmmn

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
18.39	4.8237	100.0	(0,1,0)
19.94	4.4517	1.3	(0,1,1)
24.03	3.7035	35.8	(0,1,2)
26.99	3.3039	39.5	(1,0,1)
29.67	3.0107	38.5	(0,1,3)
30.94	2.8901	22.6	(0,0,4)
31.91	2.8049	52.9	(1,1,0)
32.86	2.7258	22.2	(1,1,1)
34.92	2.5694	38.3	(1,0,3)
36.23	2.4792	12.9	(0,1,4)
37.28	2.4118	15.8	(0,2,0)
38.12	2.3610	4.4	(0,2,1)
39.75	2.2678	1.6	(1,1,3)
40.53	2.2259	1.5	(0,2,2)
43.40	2.0850	5.9	(0,1,5)
44.31	2.0444	4.3	(0,2,3)
45.04	2.0128	9.1	(1,1,4)
45.92	1.9763	6.1	(1,2,0)
46.63	1.9480	9.6	(1,2,1)
47.17	1.9267	17.0	(0,0,6)
47.34	1.9203	6.6	(1,0,5)
48.69	1.8700	23.6	(1,2,2)
49.20	1.8518	6.2	(0,2,4)
51.04	1.7893	17.8	(0,1,6)

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Energy Properties

Formation Energy/atom

-2.09834

eV/atom

Energy/atom

-7.80789

eV/atom

Energy above Hull

0.2553

eV/atom

Uncorrected Energy

-6.8788

eV/atom

Volume/atom

12.02

Å³

c/a Ratio

3.3531

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

7.9990

μB

Mag. Ordering

FiM

Mag. Sites

Magnetization/Volume

0.041610

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

O · 0.625

Element Family

Metalloid-Nonmetal

Solute Fraction

0.375

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.9003

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

7.4847

J/mol·K

Ω Parameter

4.0481

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

43.786%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.9238

smaller = more stable mixing

VEC

4.250

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-1.284

kJ/mol; negative = exothermic mixing

Entropy Norm

0.8194

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.430

Family

O-rich Multi-Component

Matrix Element

O · 0.625

Related Tasks

Related computation task IDs (2)

aaachqoe aaaeajrv

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1048137

Reference Citation

The crystal structure and related material properties of MgCr2O5 were obtained from the Materials Project database (MP-ID: mp-1048137, 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_MgCr2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.44770500
_cell_length_b   4.82368600
_cell_length_c   11.56042300
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgCr2O5
_chemical_formula_sum   'Mg2 Cr4 O10'
_cell_volume   192.25730646
_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
  Mg  Mg0  1  0.75000000  0.85074400  0.25000000  1.0
  Mg  Mg1  1  0.24999900  0.14925500  0.75000000  1.0
  Cr  Cr2  1  0.24999900  0.41329500  0.09976900  1.0
  Cr  Cr3  1  0.75000000  0.58670400  0.90023100  1.0
  Cr  Cr4  1  0.75000000  0.58670400  0.59976900  1.0
  Cr  Cr5  1  0.24999900  0.41329500  0.40023100  1.0
  O  O6  1  0.75000000  0.41804500  0.75000000  1.0
  O  O7  1  0.24999900  0.58195400  0.25000000  1.0
  O  O8  1  0.75000000  0.56839900  0.07493400  1.0
  O  O9  1  0.24999900  0.43160200  0.92506500  1.0
  O  O10  1  0.75000000  0.56839900  0.42506500  1.0
  O  O11  1  0.24999900  0.43160200  0.57493500  1.0
  O  O12  1  0.24999900  0.06900000  0.35749900  1.0
  O  O13  1  0.75000000  0.93100100  0.64250100  1.0
  O  O14  1  0.75000000  0.93100100  0.85749800  1.0
  O  O15  1  0.24999900  0.06900000  0.14250200  1.0

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