Mg6CoNi

高熵材料 HEA 传统材料 TRA

MP-ID: mp-1022201 · Space group: Amm2 (#38)

Materials Project API

Basic Information

Formula

Mg6CoNi

MP-ID

mp-1022201

Elements

Sites

Density

3.1022

g/cm³

Volume

282.05

Å³

Cell a

4.5309

Cell b

6.5903

Cell c

9.4457

α Angle

90.00

β Angle

90.00

γ Angle

90.00

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
16.40	5.4048	18.9	(0,1,1)
18.79	4.7228	1.8	(0,0,2)
25.66	3.4722	11.6	(1,1,1)
27.06	3.2951	6.3	(0,2,0)
27.28	3.2696	9.2	(1,0,2)
31.49	2.8410	9.4	(0,1,3)
33.15	2.7024	4.1	(0,2,2)
38.11	2.3614	23.2	(0,0,4)
38.80	2.3209	100.0	(1,2,2)
39.79	2.2655	25.7	(2,0,0)
43.20	2.0941	7.4	(1,0,4)
43.31	2.0893	3.1	(2,1,1)
46.96	1.9348	7.4	(1,3,1)
47.36	1.9194	1.5	(0,2,4)
48.78	1.8668	2.3	(2,2,0)
51.60	1.7713	4.3	(2,1,3)
51.72	1.7674	1.8	(1,2,4)
52.73	1.7361	2.1	(2,2,2)
54.43	1.6856	2.6	(1,1,5)
54.84	1.6741	1.6	(1,3,3)
55.80	1.6476	7.6	(0,4,0)
56.27	1.6348	14.0	(2,0,4)
63.20	1.4713	2.7	(1,4,2)
63.53	1.4645	1.1	(2,2,4)

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Energy Properties

Formation Energy/atom

0.09388

eV/atom

Energy/atom

-2.74317

eV/atom

Energy above Hull

0.1525

eV/atom

Uncorrected Energy

-2.7432

eV/atom

Volume/atom

17.63

Å³

c/a Ratio

2.0847

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

1.5023

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.005330

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Mg · 0.750

Element Family

Alkali-AlkEarth

Solute Fraction

0.250

Interstitial Fraction

0.000

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.7356

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

6.1160

J/mol·K

Ω Parameter

0.3691

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

10.173%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.2534

smaller = more stable mixing

VEC

3.875

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-18.709

kJ/mol; negative = exothermic mixing

Entropy Norm

0.6696

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (1)

aaacgepa

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1022201

Reference Citation

The crystal structure and related material properties of Mg6CoNi were obtained from the Materials Project database (MP-ID: mp-1022201, 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

Loading 3D structure…

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Raw CIF Data

# generated using pymatgen
data_Mg6CoNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.53091700
_cell_length_b   6.59026900
_cell_length_c   9.44565200
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg6CoNi
_chemical_formula_sum   'Mg12 Co2 Ni2'
_cell_volume   282.04680834
_cell_formula_units_Z   2
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  0.00000000  0.27756100  0.13833600  1.0
  Mg  Mg1  1  0.00000000  0.72243900  0.13833600  1.0
  Mg  Mg2  1  0.00000000  0.50000000  0.88516900  1.0
  Mg  Mg3  1  0.50000000  0.22187000  0.86188100  1.0
  Mg  Mg4  1  0.50000000  0.77813000  0.86188100  1.0
  Mg  Mg5  1  0.50000000  0.50000000  0.61268100  1.0
  Mg  Mg6  1  0.00000000  0.77756100  0.63833600  1.0
  Mg  Mg7  1  0.00000000  0.22243900  0.63833600  1.0
  Mg  Mg8  1  0.00000000  0.00000000  0.38516900  1.0
  Mg  Mg9  1  0.50000000  0.72187000  0.36188100  1.0
  Mg  Mg10  1  0.50000000  0.27813000  0.36188100  1.0
  Mg  Mg11  1  0.50000000  0.00000000  0.11268100  1.0
  Co  Co12  1  0.00000000  0.50000000  0.40005900  1.0
  Co  Co13  1  0.00000000  0.00000000  0.90005900  1.0
  Ni  Ni14  1  0.50000000  0.50000000  0.10165600  1.0
  Ni  Ni15  1  0.50000000  0.00000000  0.60165600  1.0

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