Mg6NbGa

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1016680 · Space group: Amm2 (#38)

Materials Project API

Basic Information

Formula

Mg6NbGa

MP-ID

mp-1016680

Elements

Sites

Density

3.1510

g/cm³

Volume

325.11

Å³

Cell a

4.9685

Cell b

5.9514

Cell c

10.9947

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
16.12	5.4974	43.7	(0,0,2)
16.94	5.2338	3.6	(0,1,1)
17.85	4.9685	32.1	(1,0,0)
24.14	3.6861	29.0	(1,0,2)
24.71	3.6034	2.0	(1,1,1)
30.03	2.9757	9.1	(0,2,0)
32.58	2.7487	15.0	(0,0,4)
33.92	2.6426	1.1	(1,1,3)
34.27	2.6169	37.9	(0,2,2)
35.15	2.5529	11.8	(1,2,0)
36.16	2.4843	41.7	(2,0,0)
37.39	2.4052	64.9	(1,0,4)
38.90	2.3154	100.0	(1,2,2)
39.82	2.2638	9.0	(2,0,2)
44.89	2.0191	5.2	(0,2,4)
47.69	1.9070	5.0	(2,2,0)
48.68	1.8706	10.5	(1,2,4)
49.45	1.8431	9.0	(2,0,4)
49.76	1.8325	2.0	(0,0,6)
50.67	1.8017	24.2	(2,2,2)
53.28	1.7193	3.8	(1,0,6)
55.48	1.6562	1.6	(3,0,0)
58.18	1.5858	2.5	(3,0,2)
58.95	1.5669	4.5	(2,2,4)

Get direct link

Energy Properties

Formation Energy/atom

0.10918

eV/atom

Energy/atom

-2.75485

eV/atom

Energy above Hull

0.2005

eV/atom

Uncorrected Energy

-2.7549

eV/atom

Volume/atom

20.32

Å³

c/a Ratio

2.2129

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

0.7070

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.002170

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Mg · 0.750

Element Family

Alkali-AlkEarth

Solute Fraction

0.250

Interstitial Fraction

0.000

High-Entropy Alloy Features

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

1.1321

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

5.725%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.1789

smaller = more stable mixing

VEC

2.500

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-5.802

kJ/mol; negative = exothermic mixing

Entropy Norm

0.6696

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.695

Family

Mg-based Alloy

Matrix Element

Mg · 0.750

Related Tasks

Related computation task IDs (1)

aaacfwdh

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1016680

Reference Citation

The crystal structure and related material properties of Mg6NbGa were obtained from the Materials Project database (MP-ID: mp-1016680, 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…

Style: Ball & Stick | Drag to rotate · Scroll to zoom · Right-click to pan

Raw CIF Data

# generated using pymatgen
data_Mg6NbGa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.96852100
_cell_length_b   5.95137900
_cell_length_c   10.99473900
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg6NbGa
_chemical_formula_sum   'Mg12 Nb2 Ga2'
_cell_volume   325.10950153
_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  0.24905500  0.42180300  1.0
  Mg  Mg1  1  0.50000000  0.75094500  0.42180300  1.0
  Mg  Mg2  1  0.00000000  0.75777000  0.08275400  1.0
  Mg  Mg3  1  0.00000000  0.24223000  0.08275400  1.0
  Mg  Mg4  1  0.00000000  0.00000000  0.32494800  1.0
  Mg  Mg5  1  0.00000000  0.50000000  0.32493000  1.0
  Mg  Mg6  1  0.50000000  0.74905500  0.92180300  1.0
  Mg  Mg7  1  0.50000000  0.25094500  0.92180300  1.0
  Mg  Mg8  1  0.00000000  0.25777000  0.58275400  1.0
  Mg  Mg9  1  0.00000000  0.74223000  0.58275400  1.0
  Mg  Mg10  1  0.00000000  0.50000000  0.82494800  1.0
  Mg  Mg11  1  0.00000000  0.00000000  0.82493000  1.0
  Nb  Nb12  1  0.50000000  0.00000000  0.17306400  1.0
  Nb  Nb13  1  0.50000000  0.50000000  0.67306400  1.0
  Ga  Ga14  1  0.50000000  0.50000000  0.16794000  1.0
  Ga  Ga15  1  0.50000000  0.00000000  0.66794000  1.0

Get direct link