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Ho6Al12V4Os7

High-Entropy Materials HEA

MP-ID: mp-3296279 · Space group: F-43m (#216)

Basic Information

Formula
Ho6Al12V4Os7
MP-ID
mp-3296279
Elements
4
Sites
29
Density
9.6177
g/cm³
Volume
491.85
ų
Cell a
8.8603
Å
Cell b
8.8603
Å
Cell c
8.8603
Å
α Angle
60.00
°
β Angle
60.00
°
γ Angle
60.00
°
Space Group
F-43m
Point Group
-43m
Crystal System
Cubic
Bravais Lattice
Cubic F
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
12.23 7.2344 1.6 (1,0,0)
20.04 4.4302 15.1 (1,0,-1)
20.04 4.4302 3.0 (2,1,1)
23.55 3.7781 7.2 (1,1,-1)
24.61 3.6172 10.0 (2,0,0)
28.49 3.1326 28.3 (2,2,0)
28.49 3.1326 56.7 (2,0,2)
31.11 2.8747 4.5 (0,2,-1)
31.11 2.8747 22.7 (2,0,-1)
35.08 2.5578 10.6 (1,1,-2)
35.08 2.5578 14.8 (3,1,0)
37.29 2.4115 30.8 (3,0,0)
40.73 2.2151 100.0 (2,0,-2)
40.73 2.2151 20.0 (4,2,2)
42.69 2.1180 2.8 (2,1,-2)
43.33 2.0884 3.8 (3,0,-1)
45.80 1.9812 2.0 (3,2,-1)
48.17 1.8890 1.4 (2,2,-2)
48.17 1.8890 15.5 (4,2,0)
50.46 1.8086 9.2 (0,4,0)
50.46 1.8086 9.2 (4,0,0)
52.13 1.7546 7.1 (3,3,-1)
52.67 1.7377 1.1 (3,1,-2)
54.83 1.6744 2.2 (3,-1,-2)
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Energy Properties

Formation Energy/atom
-0.64889
eV/atom
Energy/atom
-24.97055
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-24.9706
eV/atom
Volume/atom
16.96
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
0.0292
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000060
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Al · 0.414
Element Family
PostTransition-Noble
Solute Fraction
0.586
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.3074
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
10.8700
J/mol·K
Ω Parameter
1.9954
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
10.279%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3309
smaller = more stable mixing
VEC
6.138
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-10.046
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9431
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3296279
Reference Citation

The crystal structure and related material properties of Ho6Al12V4Os7 were obtained from the Materials Project database (MP-ID: mp-3296279, 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_Ho6Al12V4Os7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.86030226
_cell_length_b   8.86030288
_cell_length_c   8.86030288
_cell_angle_alpha   60.00000733
_cell_angle_beta   60.00000503
_cell_angle_gamma   60.00000353
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ho6Al12V4Os7
_chemical_formula_sum   'Ho6 Al12 V4 Os7'
_cell_volume   491.84779410
_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  0.70961986  0.70961986  0.29038014  1.0
  Ho  Ho1  1  0.29038014  0.70961986  0.29038014  1.0
  Ho  Ho2  1  0.70961986  0.29038014  0.29038014  1.0
  Ho  Ho3  1  0.29038014  0.29038014  0.70961986  1.0
  Ho  Ho4  1  0.70961986  0.29038014  0.70961986  1.0
  Ho  Ho5  1  0.29038014  0.70961986  0.70961986  1.0
  Al  Al6  1  0.12008121  0.12008121  0.63975637  1.0
  Al  Al7  1  0.12008121  0.63975637  0.12008121  1.0
  Al  Al8  1  0.63975637  0.12008121  0.12008121  1.0
  Al  Al9  1  0.12008121  0.12008121  0.12008121  1.0
  Al  Al10  1  0.66892809  0.66892809  0.99321474  1.0
  Al  Al11  1  0.66892809  0.99321474  0.66892809  1.0
  Al  Al12  1  0.99321474  0.66892809  0.66892809  1.0
  Al  Al13  1  0.66892809  0.66892809  0.66892809  1.0
  Al  Al14  1  0.33080217  0.33080217  0.00759148  1.0
  Al  Al15  1  0.33080217  0.00759148  0.33080217  1.0
  Al  Al16  1  0.00759148  0.33080217  0.33080217  1.0
  Al  Al17  1  0.33080217  0.33080217  0.33080217  1.0
  V  V18  1  0.87947342  0.87947342  0.36158074  1.0
  V  V19  1  0.87947342  0.36158074  0.87947342  1.0
  V  V20  1  0.36158074  0.87947342  0.87947342  1.0
  V  V21  1  0.87947342  0.87947342  0.87947342  1.0
  Os  Os22  1  0.00000000  0.00000000  0.00000000  1.0
  Os  Os23  1  0.99538971  0.99538971  0.50461029  1.0
  Os  Os24  1  0.50461029  0.99538971  0.50461029  1.0
  Os  Os25  1  0.99538971  0.50461029  0.50461029  1.0
  Os  Os26  1  0.50461029  0.50461029  0.99538971  1.0
  Os  Os27  1  0.99538971  0.50461029  0.99538971  1.0
  Os  Os28  1  0.50461029  0.99538971  0.99538971  1.0
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