Mg6NbCd

高熵材料 HEA 传统材料 TRA

MP-ID: mp-1016569 · Space group: Amm2 (#38)

Materials Project API

Basic Information

Formula

Mg6NbCd

MP-ID

mp-1016569

Elements

Sites

Density

3.4323

g/cm³

Volume

339.77

Å³

Cell a

4.9444

Cell b

6.2967

Cell c

10.9135

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
16.24	5.4567	16.5	(0,0,2)
16.25	5.4540	84.2	(0,1,1)
24.29	3.6640	29.3	(1,0,2)
24.30	3.6632	18.2	(1,1,1)
28.35	3.1484	14.1	(0,2,0)
32.83	2.7284	10.7	(0,0,4)
32.84	2.7270	27.3	(0,2,2)
33.74	2.6566	35.1	(1,1,3)
36.34	2.4722	38.0	(2,0,0)
37.66	2.3888	53.8	(1,0,4)
37.67	2.3879	100.0	(1,2,2)
40.04	2.2519	3.4	(2,0,2)
40.04	2.2517	17.4	(2,1,1)
43.90	2.0623	5.2	(0,1,5)
43.91	2.0619	1.5	(0,2,4)
43.93	2.0611	6.0	(0,3,1)
46.72	1.9444	7.0	(2,2,0)
47.79	1.9034	5.4	(1,1,5)
47.80	1.9030	11.2	(1,2,4)
47.81	1.9024	3.7	(1,3,1)
49.77	1.8320	6.4	(2,0,4)
49.78	1.8316	16.2	(2,2,2)
50.15	1.8189	2.9	(0,0,6)
53.72	1.7063	9.2	(1,3,3)

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Energy Properties

Formation Energy/atom

0.15155

eV/atom

Energy/atom

-2.45397

eV/atom

Energy above Hull

0.1770

eV/atom

Uncorrected Energy

-2.4540

eV/atom

Volume/atom

21.24

Å³

c/a Ratio

2.2073

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Total Mag. Moment

0.0062

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.000020

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Shared across all datasets

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

HEA

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

0.8807

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

3.268%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.1468

smaller = more stable mixing

VEC

3.625

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-7.710

kJ/mol; negative = exothermic mixing

Entropy Norm

0.6696

SS Former

Phase Tendency

Traditional Material Features

TRA

ROM Blended-Feature Radar

Rating & Classification

Related Tasks

Related computation task IDs (1)

aaacfvzr

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1016569

Reference Citation

The crystal structure and related material properties of Mg6NbCd were obtained from the Materials Project database (MP-ID: mp-1016569, 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_Mg6NbCd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.94435200
_cell_length_b   6.29669600
_cell_length_c   10.91346500
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg6NbCd
_chemical_formula_sum   'Mg12 Nb2 Cd2'
_cell_volume   339.76979487
_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  0.25149800  0.08187400  1.0
  Mg  Mg1  1  0.00000000  0.74850200  0.08187400  1.0
  Mg  Mg2  1  0.00000000  0.00000000  0.33445900  1.0
  Mg  Mg3  1  0.50000000  0.74085500  0.41359900  1.0
  Mg  Mg4  1  0.50000000  0.25914500  0.41359900  1.0
  Mg  Mg5  1  0.50000000  0.00000000  0.16694000  1.0
  Mg  Mg6  1  0.00000000  0.75149800  0.58187400  1.0
  Mg  Mg7  1  0.00000000  0.24850200  0.58187400  1.0
  Mg  Mg8  1  0.00000000  0.50000000  0.83445900  1.0
  Mg  Mg9  1  0.50000000  0.24085500  0.91359900  1.0
  Mg  Mg10  1  0.50000000  0.75914500  0.91359900  1.0
  Mg  Mg11  1  0.50000000  0.50000000  0.66694000  1.0
  Nb  Nb12  1  0.00000000  0.50000000  0.33374100  1.0
  Nb  Nb13  1  0.00000000  0.00000000  0.83374100  1.0
  Cd  Cd14  1  0.50000000  0.50000000  0.17391400  1.0
  Cd  Cd15  1  0.50000000  0.00000000  0.67391400  1.0

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