Sr12In5Ge3Pt8

High-Entropy Materials HEA

MP-ID: mp-3295632 · Space group: Pm (#6)

Materials Project API

Basic Information

Formula

Sr12In5Ge3Pt8

MP-ID

mp-3295632

Elements

Sites

Density

7.5803

g/cm³

Volume

745.71

Å³

Cell a

6.0981

Cell b

8.5698

Cell c

14.2695

α Angle

90.00

β Angle

90.00

γ Angle

90.22

Space Group

Point Group

Crystal System

Monoclinic

Bravais Lattice

Stability

Yes

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
12.41	7.1347	37.6	(0,0,2)
14.53	6.0980	88.3	(1,0,0)
17.82	4.9777	1.1	(1,-1,0)
18.88	4.6999	32.6	(1,-1,1)
18.94	4.6846	36.7	(1,1,1)
19.15	4.6356	27.1	(1,0,2)
20.73	4.2849	29.5	(0,2,0)
21.66	4.1039	7.7	(0,2,1)
24.23	3.6733	5.5	(0,2,2)
24.96	3.5674	7.5	(0,0,4)
25.36	3.5123	1.3	(1,-2,0)
25.45	3.4995	2.5	(1,2,0)
25.91	3.4389	7.5	(1,-1,3)
25.96	3.4329	6.3	(1,1,3)
26.13	3.4105	6.1	(1,-2,1)
26.22	3.3988	5.4	(1,2,1)
28.03	3.1836	4.7	(0,2,3)
28.32	3.1512	3.9	(1,-2,2)
28.41	3.1419	2.6	(1,2,2)
29.29	3.0490	6.5	(2,0,0)
30.84	2.8996	27.7	(1,-1,4)
30.88	2.8960	28.5	(1,1,4)
31.10	2.8762	17.2	(2,-1,0)
31.17	2.8691	16.5	(2,1,0)

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Energy Properties

Formation Energy/atom

-0.85501

eV/atom

Energy/atom

-27.57496

eV/atom

Energy above Hull

0.0000

eV/atom

Uncorrected Energy

-27.5750

eV/atom

Volume/atom

26.63

Å³

c/a Ratio

2.3400

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Total Mag. Moment

0.0203

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.000030

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Sr · 0.429

Element Family

Alkali-AlkEarth

Solute Fraction

0.571

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.2680

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

10.5422

J/mol·K

Ω Parameter

4.2509

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

17.560%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.5804

smaller = more stable mixing

VEC

4.679

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-3.074

kJ/mol; negative = exothermic mixing

Entropy Norm

0.9147

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (1)

aaahfnfc

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-3295632

Reference Citation

The crystal structure and related material properties of Sr12In5Ge3Pt8 were obtained from the Materials Project database (MP-ID: mp-3295632, 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_Sr12In5Ge3Pt8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.09808366
_cell_length_b   8.56982241
_cell_length_c   14.26948498
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.22269908
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr12In5Ge3Pt8
_chemical_formula_sum   'Sr12 In5 Ge3 Pt8'
_cell_volume   745.71043175
_cell_formula_units_Z   1
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  0.14806053  0.60508420  0.10199837  1.0
  Sr  Sr1  1  0.14517201  0.89911088  0.90412696  1.0
  Sr  Sr2  1  0.85052631  0.10596378  0.39678187  1.0
  Sr  Sr3  1  0.84613888  0.39121163  0.59708645  1.0
  Sr  Sr4  1  0.84613888  0.39121163  0.90291355  1.0
  Sr  Sr5  1  0.85052631  0.10596378  0.10321813  1.0
  Sr  Sr6  1  0.14517201  0.89911088  0.59587304  1.0
  Sr  Sr7  1  0.14806053  0.60508420  0.39800163  1.0
  Sr  Sr8  1  0.34880598  0.25492875  0.25000000  1.0
  Sr  Sr9  1  0.35726268  0.24099125  0.75000000  1.0
  Sr  Sr10  1  0.65168340  0.75300215  0.25000000  1.0
  Sr  Sr11  1  0.64320813  0.75217868  0.75000000  1.0
  In  In12  1  0.36179595  0.24873116  0.00195383  1.0
  In  In13  1  0.63873978  0.75163913  0.49830799  1.0
  In  In14  1  0.63873978  0.75163913  0.00169201  1.0
  In  In15  1  0.36179595  0.24873116  0.49804617  1.0
  In  In16  1  0.15520181  0.59617264  0.75000000  1.0
  Ge  Ge17  1  0.83469189  0.40416452  0.25000000  1.0
  Ge  Ge18  1  0.83907302  0.09599181  0.75000000  1.0
  Ge  Ge19  1  0.16905237  0.90359946  0.25000000  1.0
  Pt  Pt20  1  0.63009907  0.46228518  0.09966521  1.0
  Pt  Pt21  1  0.63079805  0.03784299  0.90334597  1.0
  Pt  Pt22  1  0.37236894  0.96362412  0.40131741  1.0
  Pt  Pt23  1  0.37681134  0.53399231  0.58882014  1.0
  Pt  Pt24  1  0.37681134  0.53399231  0.91117986  1.0
  Pt  Pt25  1  0.37236894  0.96362412  0.09868259  1.0
  Pt  Pt26  1  0.63079805  0.03784299  0.59665403  1.0
  Pt  Pt27  1  0.63009907  0.46228518  0.40033479  1.0

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