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Ho2AgIr

High-Entropy Materials HEA Traditional Materials TRA Elasticity Data ELA

MP-ID: mp-977358 · Space group: Fm-3m (#225)

Basic Information

Formula
Ho2AgIr
MP-ID
mp-977358
Elements
3
Sites
4
Density
12.1748
g/cm³
Volume
85.92
ų
Cell a
4.9530
Å
Cell b
4.9530
Å
Cell c
4.9530
Å
α Angle
60.00
°
β Angle
60.00
°
γ Angle
60.00
°
Space Group
Fm-3m
Point Group
m-3m
Crystal System
Cubic
Bravais Lattice
Cubic F
Stability
No
Packing Fraction
0.7400

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 7)
2θd (Å)Ihkl
21.98 4.0441 3.3 (1,0,0)
36.27 2.4765 100.0 (2,1,1)
42.82 2.1120 2.0 (2,1,0)
52.24 1.7512 17.6 (2,2,0)
65.26 1.4298 35.9 (3,3,2)
77.01 1.2383 11.2 (4,2,2)
88.23 1.1075 16.4 (4,3,1)
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Energy Properties

Formation Energy/atom
-0.62222
eV/atom
Energy/atom
-5.84141
eV/atom
Energy above Hull
0.0226
eV/atom
Uncorrected Energy
-5.8414
eV/atom
Volume/atom
21.48
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
0.0035
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000040
μB/ų

Elastic Properties

KVRH
101.795
GPa
GVRH
33.565
GPa
Young's Modulus E
90.724
GPa
Poisson Ratio ν
0.351
Pugh Ratio K/G
3.033
Vickers Hardness Est.
1.265
GPa
Ductility
Brittle
Anisotropy
0.023
Lame λ
79.418
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ho · 0.500
Element Family
Lanthanide
Solute Fraction
0.500
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0397
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.6442
J/mol·K
Ω Parameter
65.1513
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
11.255%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4283
smaller = more stable mixing
VEC
10.500
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-0.247
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9464
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
B
Score
0.494
Family
Ho-rich Multi-Component
Matrix Element
Ho · 0.500

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
0.0230
Homogeneous Poisson ν
0.3510
Debye Temperature
256.0
K
Sound Velocity
1,867.2
m/s
Homogeneity
0.3510

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-977358
Reference Citation

The crystal structure and related material properties of Ho2AgIr were obtained from the Materials Project database (MP-ID: mp-977358, 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_Ho2AgIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.95300723
_cell_length_b   4.95300723
_cell_length_c   4.95300723
_cell_angle_alpha   60.00000000
_cell_angle_beta   60.00000000
_cell_angle_gamma   60.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ho2AgIr
_chemical_formula_sum   'Ho2 Ag1 Ir1'
_cell_volume   85.91952910
_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  0.75000000  0.75000000  0.75000000  1.0
  Ho  Ho1  1  0.25000000  0.25000000  0.25000000  1.0
  Ag  Ag2  1  0.00000000  0.00000000  0.00000000  1.0
  Ir  Ir3  1  0.50000000  0.50000000  0.50000000  1.0
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