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Y16Ho4(Ir3Os)3

High-Entropy Materials HEA

MP-ID: mp-3291887 · Space group: P4 (#75)

Basic Information

Formula
Y16Ho4(Ir3Os)3
MP-ID
mp-3291887
Elements
4
Sites
32
Density
9.6937
g/cm³
Volume
750.79
ų
Cell a
10.8140
Å
Cell b
10.8140
Å
Cell c
6.4202
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P4
Point Group
4
Crystal System
Tetragonal
Bravais Lattice
Tetragonal P
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
16.39 5.4070 27.6 (2,0,0)
23.02 3.8628 96.7 (2,1,1)
23.27 3.8233 29.2 (2,2,0)
26.06 3.4197 10.5 (3,1,0)
27.79 3.2101 6.2 (0,0,2)
29.60 3.0182 35.1 (3,1,1)
32.44 2.7603 31.1 (2,0,2)
32.96 2.7174 49.9 (3,2,1)
33.51 2.6745 71.0 (2,1,2)
35.21 2.5489 16.3 (3,3,0)
36.55 2.4585 3.3 (2,2,2)
37.03 2.4280 70.3 (4,1,1)
37.18 2.4181 100.0 (4,2,0)
37.52 2.3973 31.9 (3,0,2)
38.46 2.3405 85.8 (3,1,2)
39.84 2.2629 12.7 (4,2,1)
41.19 2.1915 25.8 (3,2,2)
42.63 2.1208 3.2 (5,1,0)
43.78 2.0679 39.3 (4,0,2)
44.19 2.0496 4.2 (4,3,1)
44.61 2.0311 7.3 (4,1,2)
45.44 1.9962 5.2 (3,3,2)
46.40 1.9570 45.7 (2,1,3)
47.05 1.9314 1.4 (4,2,2)
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Energy Properties

Formation Energy/atom
-0.74550
eV/atom
Energy/atom
-34.70590
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-34.7059
eV/atom
Volume/atom
23.46
ų
c/a Ratio
0.5937

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0526
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000070
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Y · 0.500
Element Family
4d-TM
Solute Fraction
0.500
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.1852
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.8537
J/mol·K
Ω Parameter
0.5436
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
12.901%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4735
smaller = more stable mixing
VEC
6.156
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-39.817
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8549
SS Former
0
Phase Tendency
AM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3291887
Reference Citation

The crystal structure and related material properties of Y16Ho4(Ir3Os)3 were obtained from the Materials Project database (MP-ID: mp-3291887, 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_Y16Ho4(Ir3Os)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.81399845
_cell_length_b   10.81399845
_cell_length_c   6.42015173
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y16Ho4(Ir3Os)3
_chemical_formula_sum   'Y16 Ho4 Ir9 Os3'
_cell_volume   750.78899487
_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
  Y  Y0  1  0.29368191  0.08649163  0.38159165  1.0
  Y  Y1  1  0.29366051  0.91419750  0.88197837  1.0
  Y  Y2  1  0.70633949  0.08580250  0.88197837  1.0
  Y  Y3  1  0.70631809  0.91350837  0.38159165  1.0
  Y  Y4  1  0.58580250  0.79366051  0.88197837  1.0
  Y  Y5  1  0.58649163  0.20631809  0.38159165  1.0
  Y  Y6  1  0.41350837  0.79368191  0.38159165  1.0
  Y  Y7  1  0.41419750  0.20633949  0.88197837  1.0
  Y  Y8  1  0.20853310  0.41317454  0.62100864  1.0
  Y  Y9  1  0.20750417  0.58742551  0.11678441  1.0
  Y  Y10  1  0.79249583  0.41257449  0.11678441  1.0
  Y  Y11  1  0.79146690  0.58682546  0.62100864  1.0
  Y  Y12  1  0.91257449  0.70750417  0.11678441  1.0
  Y  Y13  1  0.91317454  0.29146690  0.62100864  1.0
  Y  Y14  1  0.08682546  0.70853310  0.62100864  1.0
  Y  Y15  1  0.08742551  0.29249583  0.11678441  1.0
  Ho  Ho16  1  0.00000000  0.00000000  0.49820844  1.0
  Ho  Ho17  1  0.00000000  0.00000000  0.99881001  1.0
  Ho  Ho18  1  0.50000000  0.50000000  0.99881001  1.0
  Ho  Ho19  1  0.50000000  0.50000000  0.49820844  1.0
  Ir  Ir20  1  0.85049758  0.15208110  0.24942361  1.0
  Ir  Ir21  1  0.84962992  0.84868440  0.74904296  1.0
  Ir  Ir22  1  0.15037008  0.15131560  0.74904296  1.0
  Ir  Ir23  1  0.14950242  0.84791890  0.24942361  1.0
  Ir  Ir24  1  0.65131560  0.34962992  0.74904296  1.0
  Ir  Ir25  1  0.65208110  0.64950242  0.24942361  1.0
  Ir  Ir26  1  0.34791890  0.35049758  0.24942361  1.0
  Ir  Ir27  1  0.34868440  0.65037008  0.74904296  1.0
  Ir  Ir28  1  0.00000000  0.50000000  0.37366765  1.0
  Os  Os29  1  0.50000000  0.00000000  0.13170167  1.0
  Os  Os30  1  0.50000000  0.00000000  0.63088962  1.0
  Os  Os31  1  0.00000000  0.50000000  0.87038555  1.0
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