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CeB2Rh2C

High-Entropy Materials HEA

MP-ID: mp-6191 · Space group: I4/mmm (#139)

Basic Information

Formula
CeB2Rh2C
MP-ID
mp-6191
Elements
4
Sites
6
Density
8.2842
g/cm³
Volume
76.08
ų
Cell a
5.7878
Å
Cell b
5.7878
Å
Cell c
5.7878
Å
α Angle
141.03
°
β Angle
141.03
°
γ Angle
56.29
°
Space Group
I4/mmm
Point Group
4/mmm
Crystal System
Tetragonal
Bravais Lattice
Tetragonal I
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 23)
2θd (Å)Ihkl
17.38 5.1033 6.2 (1,1,-1)
24.65 3.6114 31.3 (1,0,0)
32.80 2.7302 1.1 (0,0,1)
35.16 2.5526 19.2 (2,1,-1)
35.17 2.5517 28.1 (2,2,-2)
37.35 2.4074 100.0 (1,1,0)
47.07 1.9306 28.3 (1,-1,1)
48.85 1.8642 2.0 (2,2,-1)
50.55 1.8057 1.4 (2,0,0)
50.58 1.8046 5.7 (3,2,-2)
53.85 1.7026 8.2 (1,0,1)
60.09 1.5398 8.1 (2,1,0)
60.10 1.5396 23.3 (3,1,-1)
64.55 1.4438 21.0 (3,3,-2)
68.77 1.3651 8.8 (0,0,2)
68.83 1.3641 1.8 (4,3,-3)
71.57 1.3183 4.1 (3,2,-1)
74.28 1.2769 1.6 (2,-1,1)
74.35 1.2758 3.4 (4,4,-4)
79.65 1.2038 1.8 (3,0,0)
79.65 1.2037 10.2 (2,2,0)
80.96 1.1875 20.4 (2,0,1)
87.58 1.1140 2.0 (4,3,-2)
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Energy Properties

Formation Energy/atom
-0.61422
eV/atom
Energy/atom
-7.82344
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-7.8234
eV/atom
Volume/atom
12.68
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
0.0116
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000150
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
B · 0.333
Element Family
Metalloid-Nonmetal
Solute Fraction
0.667
Interstitial Fraction
0.500

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.3297
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
11.0548
J/mol·K
Ω Parameter
0.6048
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
31.335%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4511
smaller = more stable mixing
VEC
5.167
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-42.844
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9591
SS Former
0
Phase Tendency
AM

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-6191
Reference Citation

The crystal structure and related material properties of CeB2Rh2C were obtained from the Materials Project database (MP-ID: mp-6191, 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_CeB2Rh2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.78775437
_cell_length_b   5.78775437
_cell_length_c   5.78775437
_cell_angle_alpha   141.03016219
_cell_angle_beta   141.03016219
_cell_angle_gamma   56.29243333
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CeB2Rh2C
_chemical_formula_sum   'Ce1 B2 Rh2 C1'
_cell_volume   76.08143695
_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
  Ce  Ce0  1  0.00000000  0.00000000  0.00000000  1.0
  B  B1  1  0.35257900  0.35257900  0.00000000  1.0
  B  B2  1  0.64742100  0.64742100  0.00000000  1.0
  Rh  Rh3  1  0.25000000  0.75000000  0.50000000  1.0
  Rh  Rh4  1  0.75000000  0.25000000  0.50000000  1.0
  C  C5  1  0.50000000  0.50000000  0.00000000  1.0
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