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Ho20Cd3Ag3Ru2

High-Entropy Materials HEA

MP-ID: mp-3291266 · Space group: P-6m2 (#187)

Basic Information

Formula
Ho20Cd3Ag3Ru2
MP-ID
mp-3291266
Elements
4
Sites
28
Density
9.2374
g/cm³
Volume
748.10
ų
Cell a
9.4609
Å
Cell b
9.4609
Å
Cell c
9.6509
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
120.00
°
Space Group
P-6m2
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
14.18 6.2460 2.2 (1,0,-1,1)
21.37 4.1579 2.7 (1,0,-1,2)
28.58 3.1230 14.6 (2,0,-2,2)
28.83 3.0968 10.0 (3,-1,-2,0)
28.83 3.0968 10.0 (2,1,-3,0)
29.84 2.9944 29.1 (1,0,-1,3)
30.31 2.9487 1.8 (3,-2,-1,1)
30.31 2.9487 3.7 (3,-1,-2,1)
32.79 2.7311 13.6 (3,0,-3,0)
34.12 2.6279 65.2 (3,0,-3,1)
34.41 2.6063 100.0 (3,-1,-2,2)
35.48 2.5301 41.1 (2,0,-2,3)
37.27 2.4127 11.7 (0,0,0,4)
38.05 2.3652 5.2 (4,-2,-2,0)
38.05 2.3652 10.4 (2,2,-4,0)
40.43 2.2310 5.4 (3,-1,-2,3)
43.53 2.0790 4.1 (2,0,-2,4)
48.27 1.8855 3.8 (4,0,-4,2)
48.43 1.8797 1.6 (5,-2,-3,0)
48.45 1.8787 1.0 (1,-1,0,5)
48.45 1.8787 2.1 (1,0,-1,5)
49.08 1.8561 5.4 (4,-1,-3,3)
51.08 1.7879 1.6 (5,-1,-4,0)
52.02 1.7580 4.4 (5,-1,-4,1)
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Energy Properties

Formation Energy/atom
-0.30221
eV/atom
Energy/atom
-30.04716
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-30.0472
eV/atom
Volume/atom
26.72
ų
c/a Ratio
1.0201

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.3704
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000500
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ho · 0.714
Element Family
Lanthanide
Solute Fraction
0.286
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.9075
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.5447
J/mol·K
Ω Parameter
72.8360
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
8.656%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3239
smaller = more stable mixing
VEC
10.893
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
0.168
kJ/mol; negative = exothermic mixing
Entropy Norm
0.6546
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3291266
Reference Citation

The crystal structure and related material properties of Ho20Cd3Ag3Ru2 were obtained from the Materials Project database (MP-ID: mp-3291266, 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_Ho20Cd3Ag3Ru2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.46088575
_cell_length_b   9.46088554
_cell_length_c   9.65085485
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   120.00000412
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ho20Cd3Ag3Ru2
_chemical_formula_sum   'Ho20 Cd3 Ag3 Ru2'
_cell_volume   748.10056736
_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
  Ho  Ho0  1  0.00000000  0.00000000  0.47642905  1.0
  Ho  Ho1  1  0.00000000  0.00000000  0.02357095  1.0
  Ho  Ho2  1  0.20974858  0.79025142  0.44022456  1.0
  Ho  Ho3  1  0.20974858  0.41949917  0.44022456  1.0
  Ho  Ho4  1  0.58050083  0.79025142  0.44022456  1.0
  Ho  Ho5  1  0.79112016  0.20887984  0.55981757  1.0
  Ho  Ho6  1  0.79112016  0.58224032  0.55981757  1.0
  Ho  Ho7  1  0.41775968  0.20887984  0.55981757  1.0
  Ho  Ho8  1  0.79112016  0.20887984  0.94018243  1.0
  Ho  Ho9  1  0.79112016  0.58224032  0.94018243  1.0
  Ho  Ho10  1  0.41775968  0.20887984  0.94018243  1.0
  Ho  Ho11  1  0.20974858  0.79025142  0.05977544  1.0
  Ho  Ho12  1  0.20974858  0.41949917  0.05977544  1.0
  Ho  Ho13  1  0.58050083  0.79025142  0.05977544  1.0
  Ho  Ho14  1  0.54097149  0.45902851  0.25000000  1.0
  Ho  Ho15  1  0.54097149  0.08194298  0.25000000  1.0
  Ho  Ho16  1  0.91805702  0.45902851  0.25000000  1.0
  Ho  Ho17  1  0.45874222  0.54125778  0.75000000  1.0
  Ho  Ho18  1  0.45874222  0.91748244  0.75000000  1.0
  Ho  Ho19  1  0.08251756  0.54125778  0.75000000  1.0
  Cd  Cd20  1  0.10991930  0.89008070  0.75000000  1.0
  Cd  Cd21  1  0.10991930  0.21983660  0.75000000  1.0
  Cd  Cd22  1  0.78016340  0.89008070  0.75000000  1.0
  Ag  Ag23  1  0.87751265  0.12248735  0.25000000  1.0
  Ag  Ag24  1  0.87751265  0.75502829  0.25000000  1.0
  Ag  Ag25  1  0.24497171  0.12248735  0.25000000  1.0
  Ru  Ru26  1  0.33333300  0.66666700  0.25000000  1.0
  Ru  Ru27  1  0.66666700  0.33333300  0.75000000  1.0
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