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Eu2B5Os3

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-582389 · Space group: C2 (#5)

Basic Information

Formula
Eu2B5Os3
MP-ID
mp-582389
Elements
3
Sites
10
Density
10.7589
g/cm³
Volume
143.33
ų
Cell a
5.7271
Å
Cell b
5.7270
Å
Cell c
8.0531
Å
α Angle
57.47
°
β Angle
57.47
°
γ Angle
41.55
°
Space Group
C2
Point Group
2
Crystal System
Monoclinic
Bravais Lattice
Monoclinic C
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
13.44 6.5880 11.8 (0,0,1)
16.66 5.3226 25.4 (1,1,1)
22.59 3.9356 2.1 (1,1,2)
24.14 3.6861 13.2 (1,0,0)
24.14 3.6861 13.2 (0,1,0)
24.66 3.6105 15.0 (0,1,1)
24.66 3.6105 15.0 (1,0,1)
30.31 2.9486 11.7 (1,1,-1)
30.52 2.9289 89.8 (1,0,-1)
30.52 2.9289 89.8 (0,1,-1)
31.75 2.8183 4.7 (0,1,2)
31.75 2.8183 4.7 (1,0,2)
33.52 2.6735 100.0 (1,1,3)
33.66 2.6623 24.4 (2,1,1)
33.66 2.6623 24.4 (1,2,1)
33.68 2.6613 20.0 (2,2,2)
34.79 2.5784 60.4 (2,1,2)
34.79 2.5784 60.3 (1,2,2)
34.96 2.5668 65.2 (2,2,1)
37.81 2.3791 3.8 (2,2,3)
37.94 2.3714 2.1 (2,1,0)
37.94 2.3713 2.1 (1,2,0)
40.92 2.2053 19.0 (1,0,-2)
40.92 2.2053 19.0 (0,1,-2)
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Energy Properties

Formation Energy/atom
-0.39026
eV/atom
Energy/atom
-9.15579
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-27.7515
eV/atom
Volume/atom
14.33
ų
c/a Ratio
-

Electronic Properties

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

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
13.6523
μB
Mag. Ordering
FiM
Mag. Sites
5
Magnetization/Volume
0.095250
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
B · 0.500
Element Family
Metalloid-Nonmetal
Solute Fraction
0.500
Interstitial Fraction
0.500

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0297
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.5605
J/mol·K
Ω Parameter
3.1853
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
30.063%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3666
smaller = more stable mixing
VEC
5.300
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-6.413
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9372
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
B
Score
0.480
Family
Interstitial Alloy
Matrix Element
B · 0.500

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-582389
Reference Citation

The crystal structure and related material properties of Eu2B5Os3 were obtained from the Materials Project database (MP-ID: mp-582389, 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_Eu2B5Os3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.72705759
_cell_length_b   5.72704403
_cell_length_c   8.05308455
_cell_angle_alpha   57.47114998
_cell_angle_beta   57.47138645
_cell_angle_gamma   41.55483872
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Eu2B5Os3
_chemical_formula_sum   'Eu2 B5 Os3'
_cell_volume   143.33300929
_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
  Eu  Eu0  1  0.38418373  0.94640260  0.23428533  1.0
  Eu  Eu1  1  0.05361715  0.61580573  0.76569965  1.0
  B  B2  1  0.72412784  0.27587423  0.50000501  1.0
  B  B3  1  0.07268190  0.63648812  0.31306270  1.0
  B  B4  1  0.52394098  0.52928159  0.87975776  1.0
  B  B5  1  0.36352149  0.92731549  0.68693755  1.0
  B  B6  1  0.47070512  0.47605630  0.12025396  1.0
  Os  Os7  1  0.86699371  0.39852408  0.59555860  1.0
  Os  Os8  1  0.00373923  0.99625556  0.00001888  1.0
  Os  Os9  1  0.60148787  0.13299829  0.40441957  1.0
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