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PaNb2(Co3B2)3

High-Entropy Materials HEA

MP-ID: mp-3295891 · Space group: R-3m (#166)

Basic Information

Formula
PaNb2(Co3B2)3
MP-ID
mp-3295891
Elements
4
Sites
18
Density
9.3754
g/cm³
Volume
179.26
ų
Cell a
5.6607
Å
Cell b
5.6607
Å
Cell c
5.6607
Å
α Angle
94.92
°
β Angle
94.92
°
γ Angle
94.92
°
Space Group
R-3m
Point Group
-3m
Crystal System
Trigonal
Bravais Lattice
Trigonal R
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
15.78 5.6150 19.8 (1,0,0)
21.30 4.1708 27.9 (1,0,-1)
23.43 3.7964 16.7 (1,1,0)
26.62 3.3482 1.6 (1,1,-1)
34.35 2.6110 10.9 (2,0,-1)
37.12 2.4219 35.6 (0,2,1)
37.12 2.4219 71.1 (2,1,0)
37.34 2.4080 11.8 (2,-1,-1)
38.66 2.3290 1.4 (1,-2,-1)
38.66 2.3290 7.1 (2,1,-1)
43.39 2.0854 100.0 (2,0,-2)
46.45 1.9549 1.8 (2,1,-2)
47.92 1.8982 12.3 (2,2,0)
48.65 1.8717 58.7 (2,2,-1)
49.89 1.8278 4.3 (3,0,-1)
56.47 1.6295 1.8 (3,0,-2)
57.60 1.6002 6.2 (3,1,1)
58.55 1.5764 4.8 (3,-1,-2)
59.50 1.5536 3.7 (3,1,-2)
62.44 1.4874 7.5 (2,2,2)
65.44 1.4263 1.7 (3,-2,-2)
66.62 1.4038 2.5 (0,4,0)
66.62 1.4038 1.3 (4,0,0)
66.77 1.4010 5.0 (3,2,1)
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Energy Properties

Formation Energy/atom
-0.40580
eV/atom
Energy/atom
-16.48971
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-16.4897
eV/atom
Volume/atom
9.96
ų
c/a Ratio
1.0000

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0001
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Co · 0.500
Element Family
3d-TM
Solute Fraction
0.500
Interstitial Fraction
0.333

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.1175
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.2908
J/mol·K
Ω Parameter
0.4337
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
20.390%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.1590
smaller = more stable mixing
VEC
6.412
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-44.444
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8061
SS Former
0
Phase Tendency
AM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3295891
Reference Citation

The crystal structure and related material properties of PaNb2(Co3B2)3 were obtained from the Materials Project database (MP-ID: mp-3295891, 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_PaNb2(Co3B2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.66072172
_cell_length_b   5.66072176
_cell_length_c   5.66072171
_cell_angle_alpha   94.91946886
_cell_angle_beta   94.91947469
_cell_angle_gamma   94.91948140
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PaNb2(Co3B2)3
_chemical_formula_sum   'Pa1 Nb2 Co9 B6'
_cell_volume   179.26306618
_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
  Pa  Pa0  1  0.00000000  0.00000000  0.00000000  1.0
  Nb  Nb1  1  0.66007278  0.66007278  0.66007278  1.0
  Nb  Nb2  1  0.33992722  0.33992722  0.33992722  1.0
  Co  Co3  1  0.00000000  0.00000000  0.50000000  1.0
  Co  Co4  1  0.50000000  0.00000000  0.00000000  1.0
  Co  Co5  1  0.00000000  0.50000000  0.00000000  1.0
  Co  Co6  1  0.69337064  0.20245105  0.69337064  1.0
  Co  Co7  1  0.69337064  0.69337064  0.20245105  1.0
  Co  Co8  1  0.20245105  0.69337064  0.69337064  1.0
  Co  Co9  1  0.30662936  0.79754895  0.30662936  1.0
  Co  Co10  1  0.30662936  0.30662936  0.79754895  1.0
  Co  Co11  1  0.79754895  0.30662936  0.30662936  1.0
  B  B12  1  0.61958373  0.38041627  0.00000000  1.0
  B  B13  1  0.00000000  0.61958373  0.38041627  1.0
  B  B14  1  0.38041627  1.00000000  0.61958373  1.0
  B  B15  1  1.00000000  0.38041627  0.61958373  1.0
  B  B16  1  0.61958373  0.00000000  0.38041627  1.0
  B  B17  1  0.38041627  0.61958373  1.00000000  1.0
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