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Ta6Be4Co3Ru7

High-Entropy Materials HEA

MP-ID: mp-3291986 · Space group: Pm (#6)

Basic Information

Formula
Ta6Be4Co3Ru7
MP-ID
mp-3291986
Elements
4
Sites
20
Density
12.7254
g/cm³
Volume
261.77
ų
Cell a
9.1957
Å
Cell b
9.1291
Å
Cell c
3.1182
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.19
°
Space Group
Pm
Point Group
m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic P
Stability
No
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
9.62 9.1956 1.5 (1,0,0)
13.65 6.4892 27.2 (1,-1,0)
13.69 6.4681 34.6 (1,1,0)
19.30 4.5978 1.4 (2,0,0)
21.61 4.1118 20.6 (2,-1,0)
21.67 4.1010 19.9 (2,1,0)
21.71 4.0939 20.2 (1,-2,0)
21.77 4.0832 10.9 (1,2,0)
27.49 3.2446 6.8 (2,-2,0)
27.58 3.2340 8.3 (2,2,0)
28.63 3.1182 3.8 (0,0,1)
30.74 2.9087 10.5 (3,-1,0)
30.80 2.9029 18.4 (3,1,0)
30.92 2.8918 16.7 (1,-3,0)
30.98 2.8861 14.7 (1,3,0)
31.84 2.8106 7.3 (1,-1,1)
31.86 2.8088 5.2 (1,1,1)
34.84 2.5748 2.5 (0,2,1)
35.22 2.5485 4.8 (3,-2,0)
35.32 2.5414 4.6 (2,-3,0)
35.33 2.5409 5.7 (3,2,0)
35.43 2.5338 4.9 (2,3,0)
36.15 2.4846 64.1 (2,-1,1)
36.19 2.4822 65.1 (2,1,1)
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Energy Properties

Formation Energy/atom
-0.44891
eV/atom
Energy/atom
-26.77778
eV/atom
Energy above Hull
0.0031
eV/atom
Uncorrected Energy
-26.7778
eV/atom
Volume/atom
13.09
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
0.0051
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000020
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ru · 0.350
Element Family
4d-TM
Solute Fraction
0.650
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.3351
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
11.0999
J/mol·K
Ω Parameter
0.6921
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
9.212%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3071
smaller = more stable mixing
VEC
6.050
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-39.722
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9631
SS Former
0
Phase Tendency
AM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3291986
Reference Citation

The crystal structure and related material properties of Ta6Be4Co3Ru7 were obtained from the Materials Project database (MP-ID: mp-3291986, 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_Ta6Be4Co3Ru7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.19566221
_cell_length_b   9.12910877
_cell_length_c   3.11820881
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.18702014
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta6Be4Co3Ru7
_chemical_formula_sum   'Ta6 Be4 Co3 Ru7'
_cell_volume   261.76662434
_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
  Ta  Ta0  1  0.82498925  0.67628596  0.00000000  1.0
  Ta  Ta1  1  0.17691579  0.32446844  0.00000000  1.0
  Ta  Ta2  1  0.32385819  0.82468650  0.00000000  1.0
  Ta  Ta3  1  0.67471646  0.17488153  0.00000000  1.0
  Ta  Ta4  1  0.50269327  0.50648994  0.00000000  1.0
  Ta  Ta5  1  0.99853394  0.99989401  0.00000000  1.0
  Be  Be6  1  0.60874732  0.87698703  0.00000000  1.0
  Be  Be7  1  0.38832188  0.11236464  0.00000000  1.0
  Be  Be8  1  0.11277526  0.61195519  0.00000000  1.0
  Be  Be9  1  0.88788345  0.38811190  0.00000000  1.0
  Co  Co10  1  0.56400048  0.71879354  0.50000000  1.0
  Co  Co11  1  0.49834908  0.99369798  0.50000000  1.0
  Co  Co12  1  0.00307233  0.49869487  0.50000000  1.0
  Ru  Ru13  1  0.43876523  0.28345870  0.50000000  1.0
  Ru  Ru14  1  0.06435742  0.78173456  0.50000000  1.0
  Ru  Ru15  1  0.93224360  0.21813707  0.50000000  1.0
  Ru  Ru16  1  0.28556610  0.56941676  0.50000000  1.0
  Ru  Ru17  1  0.71946831  0.44264967  0.50000000  1.0
  Ru  Ru18  1  0.21799417  0.06624994  0.50000000  1.0
  Ru  Ru19  1  0.77674848  0.93103978  0.50000000  1.0
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