LaMg14Co

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1027741 · Space group: P-6m2 (#187)

Materials Project API

Basic Information

Formula

LaMg14Co

MP-ID

mp-1027741

Elements

Sites

Density

2.4083

g/cm³

Volume

371.04

Å³

Cell a

6.4852

Cell b

6.4852

Cell c

10.1867

α Angle

90.00

β Angle

90.00

γ Angle

120.00

Space Group

P-6m2

Point Group

-6m2

Crystal System

Hexagonal

Bravais Lattice

Stability

Packing Fraction

0.7405

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
8.68	10.1867	6.1	(0,0,0,1)
15.78	5.6164	38.5	(1,0,-1,0)
17.41	5.0934	10.4	(0,0,0,2)
18.04	4.9184	11.5	(1,0,-1,1)
23.58	3.7729	27.3	(1,0,-1,2)
26.25	3.3956	2.5	(0,0,0,3)
27.51	3.2426	9.9	(2,-1,-1,0)
28.90	3.0899	5.5	(2,-1,-1,1)
30.77	2.9058	5.9	(1,0,-1,3)
31.87	2.8082	19.4	(2,0,-2,0)
31.87	2.8082	9.7	(0,2,-2,0)
32.74	2.7353	4.1	(2,-1,-1,2)
32.74	2.7353	8.2	(1,1,-2,2)
33.09	2.7072	3.8	(2,0,-2,1)
35.24	2.5467	22.8	(0,0,0,4)
36.54	2.4592	100.0	(2,0,-2,2)
38.83	2.3194	5.3	(1,0,-1,4)
38.83	2.3194	2.6	(0,1,-1,4)
41.74	2.1640	1.2	(2,0,-2,3)
42.59	2.1228	1.8	(3,-1,-2,0)
42.59	2.1228	3.5	(2,1,-3,0)
43.55	2.0782	2.9	(3,-1,-2,1)
45.28	2.0028	5.4	(2,-1,-1,4)
46.34	1.9594	10.6	(3,-1,-2,2)

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Energy Properties

Formation Energy/atom

0.13028

eV/atom

Energy/atom

-2.05072

eV/atom

Energy above Hull

0.1583

eV/atom

Uncorrected Energy

-2.0507

eV/atom

Volume/atom

23.19

Å³

c/a Ratio

1.5708

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

1.8856

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.005080

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

0.757

Family

Mg-based Alloy

Matrix Element

Mg · 0.875

Related Tasks

Related computation task IDs (1)

aaacgmin

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1027741

Reference Citation

The crystal structure and related material properties of LaMg14Co were obtained from the Materials Project database (MP-ID: mp-1027741, 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   6.48523412
_cell_length_b   6.48523358
_cell_length_c   10.18669141
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   120.00000277
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaMg14Co
_chemical_formula_sum   'La1 Mg14 Co1'
_cell_volume   371.03514718
_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  0.16666700  0.33333300  0.62500000  1.0
  Mg  Mg1  1  0.16079956  0.83039928  0.12500000  1.0
  Mg  Mg2  1  0.17950036  0.83974968  0.62500000  1.0
  Mg  Mg3  1  0.66960072  0.33920044  0.12500000  1.0
  Mg  Mg4  1  0.66025032  0.32049964  0.62500000  1.0
  Mg  Mg5  1  0.66960072  0.83039928  0.12500000  1.0
  Mg  Mg6  1  0.66025032  0.83974968  0.62500000  1.0
  Mg  Mg7  1  0.32946674  0.17053326  0.35542643  1.0
  Mg  Mg8  1  0.32946674  0.17053326  0.89457357  1.0
  Mg  Mg9  1  0.32946674  0.65893448  0.35542643  1.0
  Mg  Mg10  1  0.32946674  0.65893448  0.89457357  1.0
  Mg  Mg11  1  0.84106552  0.17053326  0.35542643  1.0
  Mg  Mg12  1  0.84106552  0.17053326  0.89457357  1.0
  Mg  Mg13  1  0.83333300  0.66666700  0.38365381  1.0
  Mg  Mg14  1  0.83333300  0.66666700  0.86634619  1.0
  Co  Co15  1  0.16666700  0.33333300  0.12500000  1.0

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