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Sc4Si4PdPt5

High-Entropy Materials HEA

MP-ID: mp-3291781 · Space group: P2/m (#10)

Basic Information

Formula
Sc4Si4PdPt5
MP-ID
mp-3291781
Elements
4
Sites
14
Density
10.1511
g/cm³
Volume
224.76
ų
Cell a
4.0574
Å
Cell b
6.3809
Å
Cell c
8.6815
Å
α Angle
90.18
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P2/m
Point Group
2/m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic P
Stability
Yes
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
10.19 8.6815 8.3 (0,0,1)
13.88 6.3808 4.0 (0,1,0)
17.22 5.1491 1.8 (0,1,-1)
17.27 5.1339 1.8 (0,1,1)
20.46 4.3408 78.1 (0,0,2)
21.91 4.0574 38.6 (1,0,0)
24.21 3.6758 2.6 (1,0,1)
24.77 3.5942 29.4 (0,1,-2)
24.84 3.5839 56.5 (0,1,2)
26.02 3.4239 2.2 (1,1,0)
27.97 3.1904 3.6 (0,2,0)
28.00 3.1869 42.8 (1,1,-1)
28.03 3.1833 43.2 (1,1,1)
29.81 2.9976 8.1 (0,2,-1)
29.87 2.9916 1.1 (0,2,1)
30.15 2.9641 3.1 (1,0,2)
33.30 2.6904 99.7 (1,1,-2)
33.36 2.6861 60.4 (1,1,2)
33.98 2.6385 10.4 (0,1,-3)
34.06 2.6324 10.2 (0,1,3)
35.80 2.5080 100.0 (1,2,0)
37.30 2.4110 20.8 (1,2,-1)
37.35 2.4079 40.8 (1,2,1)
40.79 2.2120 26.3 (1,1,-3)
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Energy Properties

Formation Energy/atom
-1.23669
eV/atom
Energy/atom
-27.02869
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-27.0287
eV/atom
Volume/atom
16.05
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
0.0014
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
Pt · 0.357
Element Family
5d-TM
Solute Fraction
0.643
Interstitial Fraction
0.286

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.2721
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
10.5762
J/mol·K
Ω Parameter
0.3283
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
12.232%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3759
smaller = more stable mixing
VEC
6.286
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-59.917
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9176
SS Former
0
Phase Tendency
AM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3291781
Reference Citation

The crystal structure and related material properties of Sc4Si4PdPt5 were obtained from the Materials Project database (MP-ID: mp-3291781, 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_Sc4Si4PdPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.05743237
_cell_length_b   6.38086716
_cell_length_c   8.68153960
_cell_angle_alpha   90.17688477
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sc4Si4PdPt5
_chemical_formula_sum   'Sc4 Si4 Pd1 Pt5'
_cell_volume   224.76344215
_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
  Sc  Sc0  1  0.00000000  0.89080906  0.33016093  1.0
  Sc  Sc1  1  0.00000000  0.10919094  0.66983907  1.0
  Sc  Sc2  1  0.00000000  0.39240392  0.16869580  1.0
  Sc  Sc3  1  0.00000000  0.60759608  0.83130420  1.0
  Si  Si4  1  0.50000000  0.57422379  0.35137013  1.0
  Si  Si5  1  0.50000000  0.42577621  0.64862987  1.0
  Si  Si6  1  0.50000000  0.07431045  0.14994217  1.0
  Si  Si7  1  0.50000000  0.92568955  0.85005783  1.0
  Pd  Pd8  1  0.00000000  0.50000000  0.50000000  1.0
  Pt  Pt9  1  0.50000000  0.69187391  0.08631778  1.0
  Pt  Pt10  1  0.50000000  0.30812609  0.91368222  1.0
  Pt  Pt11  1  0.50000000  0.19279374  0.41368274  1.0
  Pt  Pt12  1  0.50000000  0.80720626  0.58631726  1.0
  Pt  Pt13  1  0.00000000  0.00000000  0.00000000  1.0
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