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Th2B(PdRh2)2

High-Entropy Materials HEA

MP-ID: mp-3246298 · Space group: Imm2 (#44)

Basic Information

Formula
Th2B(PdRh2)2
MP-ID
mp-3246298
Elements
4
Sites
9
Density
12.3064
g/cm³
Volume
148.34
ų
Cell a
5.9566
Å
Cell b
5.9163
Å
Cell c
5.9566
Å
α Angle
60.22
°
β Angle
59.48
°
γ Angle
60.22
°
Space Group
Imm2
Point Group
mm2
Crystal System
Orthorhombic
Bravais Lattice
Orthorhombic I
Stability
Yes
Packing Fraction
0.6800

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
20.94 4.2425 12.3 (1,0,1)
21.25 4.1812 24.8 (1,1,0)
30.01 2.9780 19.8 (2,1,1)
30.01 2.9780 6.6 (0,1,-1)
30.21 2.9582 6.3 (1,2,1)
30.25 2.9550 6.2 (1,0,-1)
37.05 2.4265 75.4 (2,2,2)
37.05 2.4265 75.4 (0,2,0)
37.08 2.4248 75.2 (2,0,0)
37.08 2.4248 75.2 (0,0,2)
42.62 2.1212 52.5 (2,0,2)
43.28 2.0906 100.0 (2,2,0)
48.10 1.8917 1.7 (3,1,2)
48.10 1.8917 3.4 (2,-1,1)
48.10 1.8917 1.7 (1,-1,2)
48.55 1.8753 1.6 (3,2,1)
48.55 1.8753 4.9 (1,2,-1)
48.67 1.8707 3.4 (2,3,1)
48.72 1.8691 1.7 (2,1,-1)
48.72 1.8691 1.7 (1,-1,-2)
53.13 1.7238 1.4 (3,2,3)
53.13 1.7238 1.4 (1,-2,1)
53.15 1.7232 1.4 (3,0,1)
53.15 1.7232 1.4 (1,0,3)
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Energy Properties

Formation Energy/atom
-0.95678
eV/atom
Energy/atom
-33.93041
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-33.9304
eV/atom
Volume/atom
16.48
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
0.0000
μB
Mag. Ordering
NM
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
Rh · 0.444
Element Family
4d-TM
Solute Fraction
0.556
Interstitial Fraction
0.111

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.2730
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
10.5840
J/mol·K
Ω Parameter
1.5397
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
18.229%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3905
smaller = more stable mixing
VEC
7.000
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-14.652
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9183
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3246298
Reference Citation

The crystal structure and related material properties of Th2B(PdRh2)2 were obtained from the Materials Project database (MP-ID: mp-3246298, 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_Th2B(PdRh2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.95659847
_cell_length_b   5.91630386
_cell_length_c   5.95659688
_cell_angle_alpha   60.22350464
_cell_angle_beta   59.48312985
_cell_angle_gamma   60.22350679
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Th2B(PdRh2)2
_chemical_formula_sum   'Th2 B1 Pd2 Rh4'
_cell_volume   148.33870477
_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
  Th  Th0  1  0.75055069  0.74983297  0.74978437  1.0
  Th  Th1  1  0.25021563  0.25016703  0.24944931  1.0
  B  B2  1  0.48814890  0.50000000  0.51185110  1.0
  Pd  Pd3  1  0.75786741  0.75712687  0.24213259  1.0
  Pd  Pd4  1  0.75786741  0.24287313  0.24213259  1.0
  Rh  Rh5  1  0.25172718  0.74984527  0.24858228  1.0
  Rh  Rh6  1  0.24610303  0.24433374  0.75389697  1.0
  Rh  Rh7  1  0.75141772  0.25015473  0.74827282  1.0
  Rh  Rh8  1  0.24610303  0.75566626  0.75389697  1.0
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