Mg14FeCuO16

High-Entropy Materials HEA

MP-ID: mp-1035796 · Space group: Pmmm (#47)

Materials Project API

Basic Information

Formula

Mg14FeCuO16

MP-ID

mp-1035796

Elements

Sites

Density

3.8317

g/cm³

Volume

310.14

Å³

Cell a

8.5386

Cell b

8.5666

Cell c

4.2400

α Angle

90.00

β Angle

90.00

γ Angle

90.00

Space Group

Pmmm

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
10.36	8.5386	30.1	(1,0,0)
20.74	4.2833	7.1	(0,2,0)
20.81	4.2693	7.0	(2,0,0)
20.95	4.2400	6.8	(0,0,1)
23.23	3.8286	10.1	(1,2,0)
23.43	3.7976	9.7	(1,0,1)
29.54	3.0238	5.9	(2,2,0)
29.65	3.0133	5.9	(0,2,1)
29.70	3.0084	5.8	(2,0,1)
31.43	2.8462	2.8	(3,0,0)
31.48	2.8416	9.6	(1,2,1)
36.50	2.4619	56.5	(2,2,1)
37.96	2.3706	3.5	(3,2,0)
38.08	2.3631	3.6	(3,0,1)
42.20	2.1417	100.0	(0,4,0)
42.34	2.1347	99.1	(4,0,0)
42.65	2.1200	97.0	(0,0,2)
43.57	2.0773	1.8	(1,4,0)
43.75	2.0691	4.3	(3,2,1)
44.01	2.0575	1.8	(1,0,2)
47.50	1.9143	1.4	(2,4,0)
47.57	1.9116	1.4	(0,4,1)
47.60	1.9105	1.5	(4,2,0)
47.70	1.9067	1.4	(4,0,1)

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Energy Properties

Formation Energy/atom

-2.78921

eV/atom

Energy/atom

-6.36931

eV/atom

Energy above Hull

0.0345

eV/atom

Uncorrected Energy

-5.9553

eV/atom

Volume/atom

9.69

Å³

c/a Ratio

0.4966

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

4.2056

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.013560

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

0.9249

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

7.6892

J/mol·K

Ω Parameter

14.7008

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

44.985%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

1.0385

smaller = more stable mixing

VEC

3.469

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-0.277

kJ/mol; negative = exothermic mixing

Entropy Norm

0.6671

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (2)

aaacgygi aaacgylr

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1035796

Reference Citation

The crystal structure and related material properties of Mg14FeCuO16 were obtained from the Materials Project database (MP-ID: mp-1035796, 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_Mg14FeCuO16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.53858852
_cell_length_b   8.56664449
_cell_length_c   4.24000573
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg14FeCuO16
_chemical_formula_sum   'Mg14 Fe1 Cu1 O16'
_cell_volume   310.14392087
_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  0.00000000  1.0
  Mg  Mg2  1  0.00000000  0.25260464  0.50000000  1.0
  Mg  Mg3  1  0.00000000  0.74739536  0.50000000  1.0
  Mg  Mg4  1  0.50000000  0.25051662  0.50000000  1.0
  Mg  Mg5  1  0.50000000  0.74948338  0.50000000  1.0
  Mg  Mg6  1  0.25073407  0.00000000  0.50000000  1.0
  Mg  Mg7  1  0.24879751  0.50000000  0.50000000  1.0
  Mg  Mg8  1  0.74926593  0.00000000  0.50000000  1.0
  Mg  Mg9  1  0.75120249  0.50000000  0.50000000  1.0
  Mg  Mg10  1  0.25010371  0.25167627  0.00000000  1.0
  Mg  Mg11  1  0.25010371  0.74832373  0.00000000  1.0
  Mg  Mg12  1  0.74989629  0.25167627  0.00000000  1.0
  Mg  Mg13  1  0.74989629  0.74832373  0.00000000  1.0
  Fe  Fe14  1  0.00000000  0.00000000  0.00000000  1.0
  Cu  Cu15  1  0.00000000  0.50000000  0.00000000  1.0
  O  O16  1  0.25483551  0.00000000  0.00000000  1.0
  O  O17  1  0.25473237  0.50000000  0.00000000  1.0
  O  O18  1  0.74516449  0.00000000  0.00000000  1.0
  O  O19  1  0.74526763  0.50000000  0.00000000  1.0
  O  O20  1  0.24876017  0.25030988  0.50000000  1.0
  O  O21  1  0.24876017  0.74969012  0.50000000  1.0
  O  O22  1  0.75123983  0.25030988  0.50000000  1.0
  O  O23  1  0.75123983  0.74969012  0.50000000  1.0
  O  O24  1  0.00000000  0.00000000  0.50000000  1.0
  O  O25  1  0.00000000  0.50000000  0.50000000  1.0
  O  O26  1  0.50000000  0.00000000  0.50000000  1.0
  O  O27  1  0.50000000  0.50000000  0.50000000  1.0
  O  O28  1  0.00000000  0.23926975  0.00000000  1.0
  O  O29  1  0.00000000  0.76073025  0.00000000  1.0
  O  O30  1  0.50000000  0.24996102  0.00000000  1.0
  O  O31  1  0.50000000  0.75003898  0.00000000  1.0

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