SrMg14Co

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1028418 · Space group: Amm2 (#38)

Materials Project API

Basic Information

Formula

SrMg14Co

MP-ID

mp-1028418

Elements

Sites

Density

2.1731

g/cm³

Volume

371.99

Å³

Cell a

6.5405

Cell b

6.2812

Cell c

10.3229

α Angle

90.00

β Angle

90.00

γ Angle

118.70

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
8.57	10.3229	71.0	(0,0,1)
15.44	5.7371	20.1	(1,0,0)
16.09	5.5097	3.2	(1,-1,0)
17.18	5.1614	16.8	(0,0,2)
17.69	5.0147	26.5	(1,0,1)
18.25	4.8607	2.0	(1,-1,1)
23.18	3.8371	12.7	(1,0,2)
23.62	3.7668	1.8	(1,-1,2)
23.62	3.7668	1.8	(0,1,2)
25.89	3.4410	5.2	(0,0,3)
27.30	3.2668	1.9	(2,-1,0)
28.42	3.1406	4.7	(1,-2,0)
28.66	3.1145	7.2	(2,-1,1)
29.73	3.0046	9.2	(1,-2,1)
30.29	2.9509	8.2	(1,0,3)
30.63	2.9185	10.0	(1,-1,3)
31.18	2.8686	14.5	(2,0,0)
32.39	2.7638	4.0	(2,0,1)
32.44	2.7603	5.9	(2,-1,2)
32.50	2.7549	27.8	(2,-2,0)
32.50	2.7549	27.8	(0,2,0)
33.40	2.6830	6.6	(1,-2,2)
33.67	2.6617	10.7	(2,-2,1)
34.76	2.5807	65.7	(0,0,4)

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Energy Properties

Formation Energy/atom

0.10492

eV/atom

Energy/atom

-5.31697

eV/atom

Energy above Hull

0.1284

eV/atom

Uncorrected Energy

-1.8461

eV/atom

Volume/atom

23.25

Å³

c/a Ratio

1.5783

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

1.1143

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.003000

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

0.5797

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

8.286%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.1680

smaller = more stable mixing

VEC

2.438

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-6.539

kJ/mol; negative = exothermic mixing

Entropy Norm

0.4218

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.737

Family

Mg-based Alloy

Matrix Element

Mg · 0.875

Related Tasks

Related computation task IDs (1)

aaacgnio

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1028418

Reference Citation

The crystal structure and related material properties of SrMg14Co were obtained from the Materials Project database (MP-ID: mp-1028418, 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_SrMg14Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.54047498
_cell_length_b   6.28122413
_cell_length_c   10.32285585
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   118.69723204
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrMg14Co
_chemical_formula_sum   'Sr1 Mg14 Co1'
_cell_volume   371.99482303
_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
  Sr  Sr0  1  0.13157406  0.81578653  0.12500000  1.0
  Mg  Mg1  1  0.16050914  0.33025407  0.62500000  1.0
  Mg  Mg2  1  0.17032722  0.83516311  0.62500000  1.0
  Mg  Mg3  1  0.62391332  0.32517362  0.12500000  1.0
  Mg  Mg4  1  0.66257734  0.32557658  0.62500000  1.0
  Mg  Mg5  1  0.62391332  0.79873870  0.12500000  1.0
  Mg  Mg6  1  0.66257734  0.83699975  0.62500000  1.0
  Mg  Mg7  1  0.34139684  0.17970107  0.37780416  1.0
  Mg  Mg8  1  0.34139684  0.17970107  0.87219584  1.0
  Mg  Mg9  1  0.34139684  0.66169677  0.37780416  1.0
  Mg  Mg10  1  0.34139684  0.66169677  0.87219584  1.0
  Mg  Mg11  1  0.86679920  0.18340010  0.34410652  1.0
  Mg  Mg12  1  0.86679920  0.18340010  0.90589348  1.0
  Mg  Mg13  1  0.82881896  0.66440998  0.39351705  1.0
  Mg  Mg14  1  0.82881896  0.66440998  0.85648295  1.0
  Co  Co15  1  0.20778460  0.35389180  0.12500000  1.0

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