Mg6CoBi

高熵材料 HEA 传统材料 TRA

MP-ID: mp-1022072 · Space group: Amm2 (#38)

Materials Project API

Basic Information

Formula

Mg6CoBi

MP-ID

mp-1022072

Elements

Sites

Density

4.0652

g/cm³

Volume

338.01

Å³

Cell a

4.8501

Cell b

6.2996

Cell c

11.0628

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
16.02	5.5314	26.3	(0,0,2)
16.19	5.4743	97.9	(0,1,1)
18.29	4.8501	21.0	(1,0,0)
24.41	3.6468	53.8	(1,0,2)
24.52	3.6303	68.5	(1,1,1)
28.04	3.1825	18.4	(0,1,3)
28.33	3.1498	17.9	(0,2,0)
32.37	2.7657	19.1	(0,0,4)
32.72	2.7371	28.0	(0,2,2)
33.68	2.6608	41.7	(1,1,3)
33.94	2.6416	9.8	(1,2,0)
37.07	2.4251	33.3	(2,0,0)
37.43	2.4025	42.6	(1,0,4)
37.74	2.3837	100.0	(1,2,2)
40.62	2.2210	5.8	(2,0,2)
40.69	2.2172	21.1	(2,1,1)
43.34	2.0876	14.0	(0,1,5)
43.55	2.0783	11.8	(0,2,4)
43.89	2.0630	9.4	(0,3,1)
47.12	1.9289	9.5	(2,1,3)
47.31	1.9215	9.1	(2,2,0)
47.41	1.9175	6.3	(1,1,5)
47.60	1.9103	10.1	(1,2,4)
47.92	1.8984	10.2	(1,3,1)

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Energy Properties

Formation Energy/atom

0.11712

eV/atom

Energy/atom

-2.48366

eV/atom

Energy above Hull

0.1742

eV/atom

Uncorrected Energy

-2.4837

eV/atom

Volume/atom

21.13

Å³

c/a Ratio

2.2810

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

1.8171

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.005380

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

0.3619

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

7.438%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.2793

smaller = more stable mixing

VEC

3.250

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-16.583

kJ/mol; negative = exothermic mixing

Entropy Norm

0.6696

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (1)

aaacgegj

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1022072

Reference Citation

The crystal structure and related material properties of Mg6CoBi were obtained from the Materials Project database (MP-ID: mp-1022072, 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_Mg6CoBi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.85010300
_cell_length_b   6.29960300
_cell_length_c   11.06283500
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg6CoBi
_chemical_formula_sum   'Mg12 Co2 Bi2'
_cell_volume   338.01080071
_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  0.23443900  0.07159100  1.0
  Mg  Mg1  1  0.00000000  0.76556100  0.07159100  1.0
  Mg  Mg2  1  0.00000000  0.00000000  0.33243700  1.0
  Mg  Mg3  1  0.50000000  0.73352400  0.40942900  1.0
  Mg  Mg4  1  0.50000000  0.26647600  0.40942900  1.0
  Mg  Mg5  1  0.50000000  0.00000000  0.16977800  1.0
  Mg  Mg6  1  0.00000000  0.73443900  0.57159100  1.0
  Mg  Mg7  1  0.00000000  0.26556100  0.57159100  1.0
  Mg  Mg8  1  0.00000000  0.50000000  0.83243700  1.0
  Mg  Mg9  1  0.50000000  0.23352400  0.90942900  1.0
  Mg  Mg10  1  0.50000000  0.76647600  0.90942900  1.0
  Mg  Mg11  1  0.50000000  0.50000000  0.66977800  1.0
  Co  Co12  1  0.00000000  0.50000000  0.36465700  1.0
  Co  Co13  1  0.00000000  0.00000000  0.86465700  1.0
  Bi  Bi14  1  0.50000000  0.50000000  0.17108800  1.0
  Bi  Bi15  1  0.50000000  0.00000000  0.67108800  1.0

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