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Sm3MnAlS7

High-Entropy Materials HEA

MP-ID: mp-867965 · Space group: P6_3 (#173)

Basic Information

Formula
Sm3MnAlS7
MP-ID
mp-867965
Elements
4
Sites
24
Density
4.8568
g/cm³
Volume
517.95
ų
Cell a
9.8662
Å
Cell b
9.8662
Å
Cell c
6.1441
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
120.00
°
Space Group
P6_3
Point Group
6
Crystal System
Hexagonal
Bravais Lattice
Hexagonal P
Stability
Yes
Packing Fraction
0.7400

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
10.35 8.5444 8.4 (1,0,-1,0)
17.78 4.9883 49.6 (1,0,-1,1)
17.98 4.9331 1.4 (2,-1,-1,0)
20.79 4.2722 14.2 (2,0,-2,0)
23.12 3.8467 25.1 (2,-1,-1,1)
25.39 3.5076 100.0 (2,0,-2,1)
27.62 3.2295 40.2 (3,-1,-2,0)
29.07 3.0721 17.8 (0,0,0,2)
30.93 2.8909 1.5 (1,0,-1,2)
31.29 2.8586 13.0 (3,-1,-2,1)
31.41 2.8481 1.8 (3,0,-3,0)
34.39 2.6077 23.3 (2,-1,-1,2)
34.72 2.5840 28.8 (3,0,-3,1)
34.72 2.5840 14.4 (3,-3,0,1)
36.01 2.4942 30.7 (2,0,-2,2)
36.01 2.4942 15.3 (2,-2,0,2)
36.43 2.4665 37.9 (4,-2,-2,0)
37.97 2.3698 17.1 (4,-1,-3,0)
40.53 2.2258 34.7 (3,-1,-2,2)
40.81 2.2110 32.4 (4,-1,-3,1)
42.31 2.1361 2.2 (4,0,-4,0)
42.31 2.1361 1.1 (4,-4,0,0)
43.32 2.0886 8.5 (3,0,-3,2)
44.93 2.0176 5.6 (4,0,-4,1)
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Energy Properties

Formation Energy/atom
-1.91586
eV/atom
Energy/atom
-6.58463
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-6.2912
eV/atom
Volume/atom
21.58
ų
c/a Ratio
0.6227

Electronic Properties

Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
10.0019
μB
Mag. Ordering
FM
Mag. Sites
2
Magnetization/Volume
0.019310
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
S · 0.583
Element Family
Metalloid-Nonmetal
Solute Fraction
0.417
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0751
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.9387
J/mol·K
Ω Parameter
0.4117
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
26.832%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.6279
smaller = more stable mixing
VEC
5.833
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-16.656
kJ/mol; negative = exothermic mixing
Entropy Norm
0.7755
SS Former
0
Phase Tendency
AM

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-867965
Reference Citation

The crystal structure and related material properties of Sm3MnAlS7 were obtained from the Materials Project database (MP-ID: mp-867965, 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

BibTeX
@article{Horton2025,
  author  = {Horton, Matthew K. and Huck, Patrick and Yang, Ruo Xi and Munro, Jason M. and Dwaraknath, Shyam and Ganose, Alex M. and Kingsbury, Ryan S. and Wen, Mingjian and Shen, Jimmy X. and Mathis, Tyler S. and Kaplan, Aaron D. and Berket, Karlo and Riebesell, Janosh and George, Janine and Rosen, Andrew S. and Spotte-Smith, Evan W. C. and McDermott, Matthew J. and Cohen, Orion A. and Dunn, Alex and Kuner, Matthew C. and Rignanese, Gian-Marco and Petretto, Guido and Waroquiers, David and Griffin, Sinead M. and Neaton, Jeffrey B. and Chrzan, Daryl C. and Asta, Mark and Hautier, Geoffroy and Cholia, Shreyas and Ceder, Gerbrand and Ong, Shyue Ping and Jain, Anubhav and Persson, Kristin A.},
  title   = {Accelerated data-driven materials science with the Materials Project},
  journal = {Nature Materials},
  year    = {2025},
  volume  = {24},
  number  = {10},
  pages   = {1522--1532},
  month   = {oct},
  doi     = {10.1038/s41563-025-02272-0},
  issn    = {1476-4660},
  url     = {https://doi.org/10.1038/s41563-025-02272-0},
  abstract = {The Materials Project was launched formally in 2011 to drive materials discovery forwards through high-throughput computation and open data. More than a decade later, the Materials Project has become an indispensable tool used by more than 600,000 materials researchers around the world. This Perspective describes how the Materials Project, as a data platform and a software ecosystem, has helped to shape research in data-driven materials science. We cover how sustainable software and computational methods have accelerated materials design while becoming more open source and collaborative in nature. Next, we present cases where the Materials Project was used to understand and discover functional materials. We then describe our efforts to meet the needs of an expanding user base, through technical infrastructure updates ranging from data architecture and cloud resources to interactive web applications. Finally, we discuss opportunities to better aid the research community, with the vision that more accessible and easy-to-understand materials data will result in democratized materials knowledge and an increasingly collaborative community.}
}

3D Crystal Structure Rendering

Loading 3D structure…

Style: Ball & Stick
Raw CIF Data
# generated using pymatgen
data_Sm3MnAlS7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.86617149
_cell_length_b   9.86617149
_cell_length_c   6.14412800
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   119.99999657
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sm3MnAlS7
_chemical_formula_sum   'Sm6 Mn2 Al2 S14'
_cell_volume   517.95045772
_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
  Sm  Sm0  1  0.14918700  0.37763100  0.23720600  1.0
  Sm  Sm1  1  0.85081300  0.62236900  0.73720600  1.0
  Sm  Sm2  1  0.62236900  0.77155700  0.23720600  1.0
  Sm  Sm3  1  0.22844300  0.85081300  0.23720600  1.0
  Sm  Sm4  1  0.77155700  0.14918700  0.73720600  1.0
  Sm  Sm5  1  0.37763100  0.22844300  0.73720600  1.0
  Mn  Mn6  1  0.00000000  0.00000000  0.02951200  1.0
  Mn  Mn7  1  0.00000000  0.00000000  0.52951200  1.0
  Al  Al8  1  0.33333300  0.66666700  0.65991500  1.0
  Al  Al9  1  0.66666700  0.33333300  0.15991500  1.0
  S  S10  1  0.33333300  0.66666700  0.02455800  1.0
  S  S11  1  0.66666700  0.33333300  0.52455800  1.0
  S  S12  1  0.09867700  0.24159200  0.80416000  1.0
  S  S13  1  0.90132300  0.75840800  0.30416000  1.0
  S  S14  1  0.75840800  0.85708600  0.80416000  1.0
  S  S15  1  0.14291400  0.90132300  0.80416000  1.0
  S  S16  1  0.85708600  0.09867700  0.30416000  1.0
  S  S17  1  0.24159200  0.14291400  0.30416000  1.0
  S  S18  1  0.42558000  0.52066200  0.50865900  1.0
  S  S19  1  0.57442000  0.47933800  0.00865900  1.0
  S  S20  1  0.47933800  0.90491700  0.50865900  1.0
  S  S21  1  0.09508300  0.57442000  0.50865900  1.0
  S  S22  1  0.90491700  0.42558000  0.00865900  1.0
  S  S23  1  0.52066200  0.09508300  0.00865900  1.0
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