Navigation

HEAS Data Platform · Materials Science Database

Np2AlB2Ru5

High-Entropy Materials HEA

MP-ID: mp-3297067 · Space group: P4/mbm (#127)

Basic Information

Formula
Np2AlB2Ru5
MP-ID
mp-3297067
Elements
4
Sites
20
Density
12.1423
g/cm³
Volume
281.16
ų
Cell a
9.5393
Å
Cell b
9.5393
Å
Cell c
3.0897
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P4/mbm
Point Group
4/mmm
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
13.13 6.7453 14.7 (1,1,0)
18.60 4.7697 25.1 (2,0,0)
20.82 4.2661 36.8 (2,1,0)
33.88 2.6457 5.6 (3,2,0)
34.59 2.5932 24.0 (2,0,1)
35.89 2.5024 100.0 (2,1,1)
38.93 2.3136 88.7 (4,1,0)
39.56 2.2782 20.8 (2,2,1)
40.10 2.2484 33.0 (3,3,0)
41.85 2.1585 65.1 (3,1,1)
42.37 2.1331 18.2 (4,2,0)
45.12 2.0096 21.4 (3,2,1)
48.20 1.8879 11.8 (4,0,1)
49.20 1.8520 4.0 (4,1,1)
50.18 1.8180 7.5 (3,3,1)
51.60 1.7714 6.5 (5,2,0)
52.10 1.7554 2.5 (4,2,1)
56.23 1.6360 9.3 (5,3,0)
57.60 1.6003 3.0 (5,1,1)
58.01 1.5899 3.4 (6,0,0)
58.89 1.5683 1.1 (6,1,0)
59.87 1.5449 15.1 (0,0,2)
60.22 1.5368 6.6 (5,2,1)
63.28 1.4697 2.2 (2,0,2)
Get direct link

Energy Properties

Formation Energy/atom
-0.44408
eV/atom
Energy/atom
-31.90367
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-31.9037
eV/atom
Volume/atom
14.06
ų
c/a Ratio
0.3239

Electronic Properties

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

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
1.1968
μB
Mag. Ordering
FiM
Mag. Sites
14
Magnetization/Volume
0.004260
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ru · 0.500
Element Family
4d-TM
Solute Fraction
0.500
Interstitial Fraction
0.200

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.2206
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
10.1481
J/mol·K
Ω Parameter
2.7946
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
20.137%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3376
smaller = more stable mixing
VEC
6.125
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-7.439
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8805
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3297067
Reference Citation

The crystal structure and related material properties of Np2AlB2Ru5 were obtained from the Materials Project database (MP-ID: mp-3297067, 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_Np2AlB2Ru5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.53929918
_cell_length_b   9.53929918
_cell_length_c   3.08972808
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Np2AlB2Ru5
_chemical_formula_sum   'Np4 Al2 B4 Ru10'
_cell_volume   281.15978294
_cell_formula_units_Z   2
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
  Np  Np0  1  0.82446163  0.67553837  0.00000000  1.0
  Np  Np1  1  0.17553837  0.32446163  0.00000000  1.0
  Np  Np2  1  0.32446163  0.82446163  0.00000000  1.0
  Np  Np3  1  0.67553837  0.17553837  0.00000000  1.0
  Al  Al4  1  0.50000000  0.50000000  0.00000000  1.0
  Al  Al5  1  0.00000000  0.00000000  0.00000000  1.0
  B  B6  1  0.62342146  0.87657854  0.00000000  1.0
  B  B7  1  0.37657854  0.12342146  0.00000000  1.0
  B  B8  1  0.12342146  0.62342146  0.00000000  1.0
  B  B9  1  0.87657854  0.37657854  0.00000000  1.0
  Ru  Ru10  1  0.57048412  0.71706833  0.50000000  1.0
  Ru  Ru11  1  0.42951588  0.28293167  0.50000000  1.0
  Ru  Ru12  1  0.07048412  0.78293167  0.50000000  1.0
  Ru  Ru13  1  0.92951588  0.21706833  0.50000000  1.0
  Ru  Ru14  1  0.28293167  0.57048412  0.50000000  1.0
  Ru  Ru15  1  0.71706833  0.42951588  0.50000000  1.0
  Ru  Ru16  1  0.21706833  0.07048412  0.50000000  1.0
  Ru  Ru17  1  0.78293167  0.92951588  0.50000000  1.0
  Ru  Ru18  1  0.50000000  0.00000000  0.50000000  1.0
  Ru  Ru19  1  0.00000000  0.50000000  0.50000000  1.0
Get direct link