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SmCdPd

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1079744 · Space group: P-62m (#189)

Basic Information

Formula
SmCdPd
MP-ID
mp-1079744
Elements
3
Sites
9
Density
9.1260
g/cm³
Volume
201.53
ų
Cell a
7.6277
Å
Cell b
7.6277
Å
Cell c
3.9997
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
120.00
°
Space Group
P-62m
Point Group
-6m2
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
23.32 3.8138 1.4 (2,-1,-1,0)
27.00 3.3029 2.0 (2,-2,0,0)
27.00 3.3029 4.0 (2,0,-2,0)
32.44 2.7602 78.3 (2,-1,-1,1)
32.44 2.7602 39.1 (1,1,-2,1)
35.24 2.5468 100.0 (2,0,-2,1)
35.97 2.4967 36.4 (3,-1,-2,0)
35.97 2.4967 18.2 (2,1,-3,0)
40.99 2.2019 14.2 (3,-3,0,0)
40.99 2.2019 28.3 (3,0,-3,0)
42.69 2.1180 18.7 (3,-1,-2,1)
42.69 2.1180 9.4 (2,1,-3,1)
45.35 1.9999 29.2 (0,0,0,2)
47.69 1.9069 2.7 (4,-2,-2,0)
47.69 1.9069 1.4 (2,2,-4,0)
49.77 1.8321 9.0 (4,-1,-3,0)
49.77 1.8321 4.5 (3,1,-4,0)
53.21 1.7213 2.3 (4,-2,-2,1)
53.21 1.7213 1.2 (2,2,-4,1)
53.57 1.7107 1.9 (2,0,-2,2)
55.14 1.6657 6.0 (4,-3,-1,1)
55.14 1.6657 12.1 (4,-1,-3,1)
55.66 1.6514 1.8 (4,0,-4,0)
59.19 1.5609 24.9 (3,-1,-2,2)
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Energy Properties

Formation Energy/atom
-0.66438
eV/atom
Energy/atom
-4.28388
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-24.9862
eV/atom
Volume/atom
22.39
ų
c/a Ratio
0.5244

Electronic Properties

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

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
0.0000
μB
Mag. Ordering
Unknown
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Sm · 0.333
Element Family
Lanthanide
Solute Fraction
0.667
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0986
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.1339
J/mol·K
Ω Parameter
1.3386
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
12.783%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4205
smaller = more stable mixing
VEC
9.333
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-8.569
kJ/mol; negative = exothermic mixing
Entropy Norm
1.0000
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
C
Score
0.390
Family
Sm-rich Multi-Component
Matrix Element
Sm · 0.333

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1079744
Reference Citation

The crystal structure and related material properties of SmCdPd were obtained from the Materials Project database (MP-ID: mp-1079744, 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_SmCdPd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.62766687
_cell_length_b   7.62766687
_cell_length_c   3.99971428
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   120.00001642
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SmCdPd
_chemical_formula_sum   'Sm3 Cd3 Pd3'
_cell_volume   201.53151220
_cell_formula_units_Z   3
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  0.40486655  0.40486655  0.50000000  1.0
  Sm  Sm1  1  0.59513345  -0.00000000  0.50000000  1.0
  Sm  Sm2  1  -0.00000000  0.59513345  0.50000000  1.0
  Cd  Cd3  1  0.74599816  0.74599816  -0.00000000  1.0
  Cd  Cd4  1  0.25400184  0.00000000  -0.00000000  1.0
  Cd  Cd5  1  0.00000000  0.25400184  0.00000000  1.0
  Pd  Pd6  1  0.66666700  0.33333300  0.00000000  1.0
  Pd  Pd7  1  0.33333300  0.66666700  0.00000000  1.0
  Pd  Pd8  1  0.00000000  0.00000000  0.50000000  1.0
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