Mg6CrGa

高熵材料 HEA 传统材料 TRA

MP-ID: mp-1016637 · Space group: Amm2 (#38)

Materials Project API

Basic Information

Formula

Mg6CrGa

MP-ID

mp-1016637

Elements

Sites

Density

2.6987

g/cm³

Volume

329.26

Å³

Cell a

4.9872

Cell b

6.1532

Cell c

10.7295

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
16.52	5.3647	20.8	(0,0,2)
16.61	5.3377	1.8	(0,1,1)
17.78	4.9872	16.4	(1,0,0)
24.37	3.6527	14.6	(1,0,2)
24.43	3.6441	2.0	(1,1,1)
29.02	3.0766	5.0	(0,2,0)
33.41	2.6824	14.5	(0,0,4)
33.58	2.6689	28.7	(0,2,2)
34.25	2.6184	6.5	(1,2,0)
36.02	2.4936	38.7	(2,0,0)
38.09	2.3624	50.6	(1,0,4)
38.25	2.3531	100.0	(1,2,2)
39.87	2.2613	4.5	(2,0,2)
44.83	2.0218	2.5	(0,2,4)
46.90	1.9372	2.5	(2,2,0)
48.59	1.8737	5.2	(1,2,4)
49.94	1.8263	8.8	(2,0,4)
50.06	1.8221	17.6	(2,2,2)
54.51	1.6833	1.6	(1,0,6)
58.09	1.5879	1.2	(3,0,2)
58.80	1.5705	2.1	(2,2,4)
59.82	1.5461	16.4	(0,2,6)
60.15	1.5383	8.1	(0,4,0)
62.85	1.4787	1.1	(0,4,2)

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Energy Properties

Formation Energy/atom

0.12114

eV/atom

Energy/atom

-2.68686

eV/atom

Energy above Hull

0.1680

eV/atom

Uncorrected Energy

-2.6869

eV/atom

Volume/atom

20.58

Å³

c/a Ratio

2.1514

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

8.1351

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.024710

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

0.7819

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

8.153%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.1878

smaller = more stable mixing

VEC

2.625

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-7.842

kJ/mol; negative = exothermic mixing

Entropy Norm

0.6696

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (1)

aaacfwbc

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1016637

Reference Citation

The crystal structure and related material properties of Mg6CrGa were obtained from the Materials Project database (MP-ID: mp-1016637, 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_Mg6CrGa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.98719900
_cell_length_b   6.15321000
_cell_length_c   10.72945300
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg6CrGa
_chemical_formula_sum   'Mg12 Cr2 Ga2'
_cell_volume   329.25775806
_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  0.50000000  0.24900700  0.41649600  1.0
  Mg  Mg1  1  0.50000000  0.75099300  0.41649600  1.0
  Mg  Mg2  1  0.00000000  0.75241000  0.08572400  1.0
  Mg  Mg3  1  0.00000000  0.24759000  0.08572400  1.0
  Mg  Mg4  1  0.00000000  0.00000000  0.33015500  1.0
  Mg  Mg5  1  0.00000000  0.50000000  0.33166500  1.0
  Mg  Mg6  1  0.50000000  0.74900700  0.91649600  1.0
  Mg  Mg7  1  0.50000000  0.25099300  0.91649600  1.0
  Mg  Mg8  1  0.00000000  0.25241000  0.58572400  1.0
  Mg  Mg9  1  0.00000000  0.74759000  0.58572400  1.0
  Mg  Mg10  1  0.00000000  0.50000000  0.83015500  1.0
  Mg  Mg11  1  0.00000000  0.00000000  0.83166500  1.0
  Cr  Cr12  1  0.50000000  0.00000000  0.16708500  1.0
  Cr  Cr13  1  0.50000000  0.50000000  0.66708500  1.0
  Ga  Ga14  1  0.50000000  0.50000000  0.16665000  1.0
  Ga  Ga15  1  0.50000000  0.00000000  0.66665000  1.0

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