Mg6ZnCrO8

High-Entropy Materials HEA

MP-ID: mp-1032533 · Space group: P4/mmm (#123)

Materials Project API

Basic Information

Formula

Mg6ZnCrO8

MP-ID

mp-1032533

Elements

Sites

Density

4.0749

g/cm³

Volume

159.43

Å³

Cell a

8.4633

Cell b

4.3403

Cell c

4.3403

α Angle

90.00

β Angle

90.00

γ Angle

90.00

Space Group

P4/mmm

Point Group

4/mmm

Crystal System

Tetragonal

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
10.45	8.4633	45.0	(1,0,0)
20.99	4.2316	10.1	(2,0,0)
23.03	3.8620	1.3	(1,1,0)
29.10	3.0690	9.0	(0,1,1)
31.00	2.8852	14.7	(1,1,1)
31.72	2.8211	3.7	(3,0,0)
36.16	2.4844	39.6	(2,1,1)
41.62	2.1701	100.0	(0,2,0)
42.74	2.1158	45.9	(4,0,0)
43.03	2.1021	5.8	(1,2,0)
43.58	2.0769	6.3	(3,1,1)
47.06	1.9310	4.5	(2,2,0)
52.53	1.7420	3.1	(4,1,1)
53.26	1.7201	3.1	(3,2,0)
60.32	1.5345	28.6	(0,2,2)
61.18	1.5150	54.4	(4,2,0)
61.40	1.5099	1.8	(1,2,2)
62.68	1.4822	1.5	(5,1,1)
64.61	1.4426	1.6	(2,2,2)
68.35	1.3725	1.3	(0,3,1)
69.36	1.3548	2.4	(1,3,1)
69.77	1.3480	1.2	(3,2,2)
70.57	1.3347	1.1	(5,2,0)
72.38	1.3056	13.3	(2,3,1)

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Energy Properties

Formation Energy/atom

-2.68629

eV/atom

Energy/atom

-6.45374

eV/atom

Energy above Hull

0.0906

eV/atom

Uncorrected Energy

-5.9853

eV/atom

Volume/atom

9.96

Å³

c/a Ratio

0.5128

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

3.8945

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.024430

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

O · 0.500

Element Family

Metalloid-Nonmetal

Solute Fraction

0.500

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.0610

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

8.8208

J/mol·K

Ω Parameter

3.4425

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

44.399%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

1.0273

smaller = more stable mixing

VEC

3.875

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-1.417

kJ/mol; negative = exothermic mixing

Entropy Norm

0.7653

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (2)

aaacgtkv aaacgtou

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1032533

Reference Citation

The crystal structure and related material properties of Mg6ZnCrO8 were obtained from the Materials Project database (MP-ID: mp-1032533, 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_Mg6ZnCrO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.46327872
_cell_length_b   4.34025705
_cell_length_c   4.34025705
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg6ZnCrO8
_chemical_formula_sum   'Mg6 Zn1 Cr1 O8'
_cell_volume   159.42981643
_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
  Mg  Mg0  1  0.50000000  0.00000000  0.00000000  1.0
  Mg  Mg1  1  0.50000000  0.50000000  0.50000000  1.0
  Mg  Mg2  1  0.24943427  0.00000000  0.50000000  1.0
  Mg  Mg3  1  0.75056573  0.00000000  0.50000000  1.0
  Mg  Mg4  1  0.24943427  0.50000000  0.00000000  1.0
  Mg  Mg5  1  0.75056573  0.50000000  0.00000000  1.0
  Zn  Zn6  1  0.00000000  0.00000000  0.00000000  1.0
  Cr  Cr7  1  0.00000000  0.50000000  0.50000000  1.0
  O  O8  1  0.25477563  0.00000000  0.00000000  1.0
  O  O9  1  0.74522437  0.00000000  0.00000000  1.0
  O  O10  1  0.24949051  0.50000000  0.50000000  1.0
  O  O11  1  0.75050949  0.50000000  0.50000000  1.0
  O  O12  1  0.00000000  0.00000000  0.50000000  1.0
  O  O13  1  0.50000000  0.00000000  0.50000000  1.0
  O  O14  1  0.00000000  0.50000000  0.00000000  1.0
  O  O15  1  0.50000000  0.50000000  0.00000000  1.0

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