LaMg14Co

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1026886 · Space group: Amm2 (#38)

Materials Project API

Basic Information

Formula

LaMg14Co

MP-ID

mp-1026886

Elements

Sites

Density

2.4414

g/cm³

Volume

366.00

Å³

Cell a

6.5800

Cell b

6.0544

Cell c

10.3473

α Angle

90.00

β Angle

90.00

γ Angle

117.39

Space Group

Amm2

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
8.55	10.3473	100.0	(0,0,1)
15.17	5.8422	28.9	(1,0,0)
16.49	5.3756	10.6	(1,-1,0)
17.14	5.1736	23.1	(0,0,2)
17.43	5.0874	38.9	(1,0,1)
18.60	4.7703	6.5	(1,-1,1)
18.60	4.7703	6.5	(0,1,1)
22.96	3.8732	18.4	(1,0,2)
23.87	3.7277	11.4	(1,-1,2)
25.83	3.4491	6.7	(0,0,3)
27.23	3.2756	2.0	(2,-1,0)
27.23	3.2756	2.0	(1,1,0)
28.58	3.1228	12.7	(2,-1,1)
29.51	3.0272	5.8	(1,-2,0)
30.09	2.9701	10.8	(1,0,3)
30.60	2.9211	9.3	(2,0,0)
30.77	2.9054	11.4	(1,-2,1)
30.80	2.9029	14.1	(1,-1,3)
31.83	2.8112	7.0	(2,0,1)
32.35	2.7675	5.0	(2,-1,2)
32.35	2.7675	5.0	(1,1,2)
33.34	2.6878	46.6	(2,-2,0)
34.32	2.6128	8.4	(1,-2,2)
34.48	2.6015	14.6	(2,-2,1)

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Energy Properties

Formation Energy/atom

0.08914

eV/atom

Energy/atom

-2.09186

eV/atom

Energy above Hull

0.1172

eV/atom

Uncorrected Energy

-2.0919

eV/atom

Volume/atom

22.87

Å³

c/a Ratio

1.5726

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

0.4406

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.001200

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Mg · 0.875

Element Family

Alkali-AlkEarth

Solute Fraction

0.125

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.4634

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

3.8528

J/mol·K

Ω Parameter

0.3688

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

7.734%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.1502

smaller = more stable mixing

VEC

2.500

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-10.370

kJ/mol; negative = exothermic mixing

Entropy Norm

0.4218

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.784

Family

Mg-based Alloy

Matrix Element

Mg · 0.875

Related Tasks

Related computation task IDs (1)

aaacglbq

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1026886

Reference Citation

The crystal structure and related material properties of LaMg14Co were obtained from the Materials Project database (MP-ID: mp-1026886, 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_LaMg14Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.57995019
_cell_length_b   6.05440708
_cell_length_c   10.34726947
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   117.39129522
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaMg14Co
_chemical_formula_sum   'La1 Mg14 Co1'
_cell_volume   365.99642702
_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
  La  La0  1  0.12562684  0.81281292  0.12500000  1.0
  Mg  Mg1  1  0.15501777  0.32750838  0.62500000  1.0
  Mg  Mg2  1  0.16616496  0.83308198  0.62500000  1.0
  Mg  Mg3  1  0.61658763  0.31936414  0.12500000  1.0
  Mg  Mg4  1  0.65992455  0.32743113  0.62500000  1.0
  Mg  Mg5  1  0.61658763  0.79722248  0.12500000  1.0
  Mg  Mg6  1  0.65992455  0.83249242  0.62500000  1.0
  Mg  Mg7  1  0.34585973  0.17769781  0.37717282  1.0
  Mg  Mg8  1  0.34585973  0.17769781  0.87282718  1.0
  Mg  Mg9  1  0.34585973  0.66816292  0.37717282  1.0
  Mg  Mg10  1  0.34585973  0.66816292  0.87282718  1.0
  Mg  Mg11  1  0.87664142  0.18832121  0.33814053  1.0
  Mg  Mg12  1  0.87664142  0.18832121  0.91185947  1.0
  Mg  Mg13  1  0.83328368  0.66664234  0.39209968  1.0
  Mg  Mg14  1  0.83328368  0.66664234  0.85790032  1.0
  Co  Co15  1  0.19687697  0.34843798  0.12500000  1.0

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