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Ho4Tc3B16Ir

High-Entropy Materials HEA

MP-ID: mp-3291325 · Space group: Pm (#6)

Basic Information

Formula
Ho4Tc3B16Ir
MP-ID
mp-3291325
Elements
4
Sites
24
Density
8.9590
g/cm³
Volume
244.46
ų
Cell a
3.5718
Å
Cell b
5.9496
Å
Cell c
11.5039
Å
α Angle
90.16
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
Pm
Point Group
m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic P
Stability
Yes
Packing Fraction
0.5240

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
7.69 11.5039 8.7 (0,0,1)
14.89 5.9495 2.1 (0,1,0)
15.40 5.7519 2.1 (0,0,2)
16.76 5.2907 1.8 (0,1,-1)
16.80 5.2785 1.1 (0,1,1)
21.46 4.1412 1.9 (0,1,-2)
23.20 3.8346 1.4 (0,0,3)
24.93 3.5718 100.0 (1,0,0)
26.12 3.4111 1.2 (1,0,1)
27.64 3.2273 6.5 (0,1,-3)
27.71 3.2190 14.7 (0,1,3)
30.04 2.9748 1.1 (0,2,0)
30.19 2.9603 1.2 (1,1,-1)
31.03 2.8820 35.7 (0,2,-1)
31.07 2.8781 29.7 (0,2,1)
31.10 2.8760 38.0 (0,0,4)
33.12 2.7047 2.2 (1,1,-2)
33.16 2.7014 1.3 (1,1,2)
34.31 2.6136 1.1 (1,0,3)
34.60 2.5922 14.4 (0,1,-4)
34.68 2.5864 10.1 (0,1,4)
37.56 2.3946 7.8 (1,1,-3)
37.62 2.3912 16.3 (1,1,3)
38.24 2.3537 13.5 (0,2,-3)
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Energy Properties

Formation Energy/atom
-0.69055
eV/atom
Energy/atom
-16.49557
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-16.4956
eV/atom
Volume/atom
10.19
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
0.4406
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.001800
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
B · 0.667
Element Family
Metalloid-Nonmetal
Solute Fraction
0.333
Interstitial Fraction
0.667

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.9613
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.9921
J/mol·K
Ω Parameter
10.3024
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
29.340%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3027
smaller = more stable mixing
VEC
4.833
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-1.763
kJ/mol; negative = exothermic mixing
Entropy Norm
0.6934
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3291325
Reference Citation

The crystal structure and related material properties of Ho4Tc3B16Ir were obtained from the Materials Project database (MP-ID: mp-3291325, 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_Ho4Tc3B16Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.57174640
_cell_length_b   5.94954927
_cell_length_c   11.50389161
_cell_angle_alpha   90.16253789
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ho4Tc3B16Ir
_chemical_formula_sum   'Ho4 Tc3 B16 Ir1'
_cell_volume   244.45994785
_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  0.50000000  0.37129729  0.14805505  1.0
  Ho  Ho1  1  0.50000000  0.62858393  0.84838715  1.0
  Ho  Ho2  1  0.50000000  0.12819920  0.65162687  1.0
  Ho  Ho3  1  0.50000000  0.87244671  0.35184247  1.0
  Tc  Tc4  1  0.50000000  0.36663763  0.41125811  1.0
  Tc  Tc5  1  0.50000000  0.63208328  0.58644892  1.0
  Tc  Tc6  1  0.50000000  0.14118100  0.90965505  1.0
  B  B7  1  0.00000000  0.11468836  0.04682819  1.0
  B  B8  1  0.00000000  0.88760521  0.95214420  1.0
  B  B9  1  0.00000000  0.38660898  0.54682459  1.0
  B  B10  1  0.00000000  0.61260758  0.45279593  1.0
  B  B11  1  0.00000000  0.13562483  0.46894629  1.0
  B  B12  1  0.00000000  0.86385797  0.53114186  1.0
  B  B13  1  0.00000000  0.36538657  0.96939277  1.0
  B  B14  1  0.00000000  0.63620491  0.03014406  1.0
  B  B15  1  0.00000000  0.02734031  0.19201718  1.0
  B  B16  1  0.00000000  0.97503010  0.80801665  1.0
  B  B17  1  0.00000000  0.47808448  0.69194150  1.0
  B  B18  1  0.00000000  0.52309105  0.30767818  1.0
  B  B19  1  0.00000000  0.21123653  0.31507888  1.0
  B  B20  1  0.00000000  0.78711096  0.68485215  1.0
  B  B21  1  0.00000000  0.28826274  0.81442577  1.0
  B  B22  1  0.00000000  0.70839073  0.18565120  1.0
  Ir  Ir23  1  0.50000000  0.85843967  0.09484498  1.0
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