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Sm4Si3Pd4

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-680578 · Space group: C2/c (#15)

Basic Information

Formula
Sm4Si3Pd4
MP-ID
mp-680578
Elements
3
Sites
22
Density
8.2346
g/cm³
Volume
448.23
ų
Cell a
11.0227
Å
Cell b
11.0227
Å
Cell c
7.9274
Å
α Angle
71.74
°
β Angle
71.74
°
γ Angle
29.46
°
Space Group
C2/c
Point Group
2/m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic C
Stability
No
Packing Fraction
0.5240

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
8.77 10.0855 2.1 (1,1,0)
16.41 5.4015 1.2 (1,0,0)
19.40 4.5753 3.2 (1,0,1)
20.63 4.3058 6.8 (2,1,0)
21.09 4.2132 12.3 (1,0,-1)
21.56 4.1216 6.7 (2,1,1)
22.46 3.9586 1.2 (1,1,2)
24.57 3.6232 39.8 (2,2,2)
25.91 3.4388 3.2 (2,1,-1)
26.51 3.3618 5.6 (3,3,0)
26.69 3.3403 4.6 (3,2,1)
27.76 3.2138 2.1 (1,0,2)
27.94 3.1932 2.9 (1,1,-2)
28.13 3.1725 15.3 (2,1,2)
29.38 3.0400 5.1 (3,3,2)
30.17 2.9624 51.1 (1,0,-2)
31.18 2.8683 1.7 (3,2,2)
31.93 2.8031 1.1 (1,-1,0)
32.59 2.7477 19.4 (3,2,-1)
33.54 2.6722 61.6 (4,3,1)
34.11 2.6289 74.4 (2,2,-2)
34.15 2.6257 100.0 (1,-1,1)
34.83 2.5756 6.3 (2,1,-2)
35.01 2.5629 13.9 (4,3,0)
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Energy Properties

Formation Energy/atom
-0.94153
eV/atom
Energy/atom
-22.49560
eV/atom
Energy above Hull
0.0479
eV/atom
Uncorrected Energy
-5.9720
eV/atom
Volume/atom
20.37
ų
c/a Ratio
-

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0054
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000010
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Sm · 0.364
Element Family
Lanthanide
Solute Fraction
0.636
Interstitial Fraction
0.273

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0901
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.0628
J/mol·K
Ω Parameter
2.0413
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
19.017%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4495
smaller = more stable mixing
VEC
6.909
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-7.165
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9922
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
C
Score
0.411
Family
Sm-rich Multi-Component
Matrix Element
Sm · 0.364

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-680578
Reference Citation

The crystal structure and related material properties of Sm4Si3Pd4 were obtained from the Materials Project database (MP-ID: mp-680578, 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_Sm4Si3Pd4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.02269471
_cell_length_b   11.02269471
_cell_length_c   7.92735281
_cell_angle_alpha   71.74316758
_cell_angle_beta   71.74316758
_cell_angle_gamma   29.46478853
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sm4Si3Pd4
_chemical_formula_sum   'Sm8 Si6 Pd8'
_cell_volume   448.22842728
_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  0.20532100  0.45451200  0.39694900  1.0
  Sm  Sm1  1  0.45451200  0.20532100  0.89694900  1.0
  Sm  Sm2  1  0.54548800  0.79467900  0.10305100  1.0
  Sm  Sm3  1  0.79829200  0.06587500  0.17109600  1.0
  Sm  Sm4  1  0.06587500  0.79829200  0.67109600  1.0
  Sm  Sm5  1  0.20170800  0.93412500  0.82890400  1.0
  Sm  Sm6  1  0.93412500  0.20170800  0.32890400  1.0
  Sm  Sm7  1  0.79467900  0.54548800  0.60305100  1.0
  Si  Si8  1  0.94889800  0.70808400  0.05087500  1.0
  Si  Si9  1  0.05110200  0.29191600  0.94912500  1.0
  Si  Si10  1  0.29191600  0.05110200  0.44912500  1.0
  Si  Si11  1  0.65197100  0.34802900  0.75000000  1.0
  Si  Si12  1  0.70808400  0.94889800  0.55087500  1.0
  Si  Si13  1  0.34802900  0.65197100  0.25000000  1.0
  Pd  Pd14  1  0.30222100  0.56461100  0.01873100  1.0
  Pd  Pd15  1  0.36307900  0.08484800  0.69474500  1.0
  Pd  Pd16  1  0.56461100  0.30222100  0.51873100  1.0
  Pd  Pd17  1  0.69777900  0.43538900  0.98126900  1.0
  Pd  Pd18  1  0.08484800  0.36307900  0.19474500  1.0
  Pd  Pd19  1  0.91515200  0.63692100  0.80525500  1.0
  Pd  Pd20  1  0.63692100  0.91515200  0.30525500  1.0
  Pd  Pd21  1  0.43538900  0.69777900  0.48126900  1.0
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