SrHfMg6

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1016401 · Space group: Amm2 (#38)

Materials Project API

Basic Information

Formula

SrHfMg6

MP-ID

mp-1016401

Elements

Sites

Density

3.3587

g/cm³

Volume

407.33

Å³

Cell a

4.7500

Cell b

8.9676

Cell c

9.5625

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
13.54	6.5412	24.5	(0,1,1)
18.56	4.7812	27.3	(0,0,2)
18.68	4.7500	26.6	(1,0,0)
19.80	4.4838	23.7	(0,2,0)
23.14	3.8436	7.6	(1,1,1)
26.45	3.3698	23.1	(1,0,2)
27.27	3.2706	22.4	(0,2,2)
27.35	3.2606	21.1	(1,2,0)
29.75	3.0034	2.3	(0,1,3)
31.35	2.8531	1.7	(0,3,1)
33.26	2.6938	100.0	(1,2,2)
35.36	2.5385	4.7	(1,1,3)
36.75	2.4458	4.7	(1,3,1)
37.63	2.3906	17.6	(0,0,4)
37.88	2.3750	17.8	(2,0,0)
40.23	2.2419	14.4	(0,4,0)
40.40	2.2324	3.5	(2,1,1)
42.33	2.1354	7.1	(1,0,4)
42.50	2.1271	6.8	(2,0,2)
42.87	2.1095	6.3	(0,2,4)
43.10	2.0988	6.5	(2,2,0)
44.64	2.0298	5.5	(0,4,2)
44.70	2.0274	6.2	(1,4,0)
45.79	1.9816	3.9	(1,3,3)

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Energy Properties

Formation Energy/atom

0.14036

eV/atom

Energy/atom

-2.53870

eV/atom

Energy above Hull

0.1694

eV/atom

Uncorrected Energy

-2.5387

eV/atom

Volume/atom

25.46

Å³

c/a Ratio

2.0131

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Total Mag. Moment

0.0038

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.000010

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

1.7692

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

8.055%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.1186

smaller = more stable mixing

VEC

2.250

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-3.930

kJ/mol; negative = exothermic mixing

Entropy Norm

0.6696

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.676

Family

Mg-based Alloy

Matrix Element

Mg · 0.750

Related Tasks

Related computation task IDs (1)

aaacfvtr

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1016401

Reference Citation

The crystal structure and related material properties of SrHfMg6 were obtained from the Materials Project database (MP-ID: mp-1016401, 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_SrHfMg6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.75004400
_cell_length_b   8.96760000
_cell_length_c   9.56244800
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrHfMg6
_chemical_formula_sum   'Sr2 Hf2 Mg12'
_cell_volume   407.32676435
_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
  Sr  Sr0  1  0.00000000  0.00000000  0.12789000  1.0
  Sr  Sr1  1  0.00000000  0.50000000  0.62789000  1.0
  Hf  Hf2  1  0.00000000  0.00000000  0.62449100  1.0
  Hf  Hf3  1  0.00000000  0.50000000  0.12449100  1.0
  Mg  Mg4  1  0.00000000  0.25085600  0.37798400  1.0
  Mg  Mg5  1  0.00000000  0.74914400  0.37798400  1.0
  Mg  Mg6  1  0.50000000  0.22752500  0.62223400  1.0
  Mg  Mg7  1  0.50000000  0.77247500  0.62223400  1.0
  Mg  Mg8  1  0.50000000  0.00000000  0.39240000  1.0
  Mg  Mg9  1  0.50000000  0.00000000  0.85477900  1.0
  Mg  Mg10  1  0.00000000  0.75085600  0.87798400  1.0
  Mg  Mg11  1  0.00000000  0.24914400  0.87798400  1.0
  Mg  Mg12  1  0.50000000  0.72752500  0.12223400  1.0
  Mg  Mg13  1  0.50000000  0.27247500  0.12223400  1.0
  Mg  Mg14  1  0.50000000  0.50000000  0.89240000  1.0
  Mg  Mg15  1  0.50000000  0.50000000  0.35477900  1.0

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