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TbNi2B2C

High-Entropy Materials HEA Elasticity Data ELA

MP-ID: mp-6092 · Space group: I4/mmm (#139)

Basic Information

Formula
TbNi2B2C
MP-ID
mp-6092
Elements
4
Sites
6
Density
7.8582
g/cm³
Volume
65.49
ų
Cell a
5.7334
Å
Cell b
5.7334
Å
Cell c
5.7334
Å
α Angle
143.76
°
β Angle
143.76
°
γ Angle
52.19
°
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 20)
2θd (Å)Ihkl
17.22 5.1490 2.4 (1,1,-1)
26.45 3.3701 61.5 (1,0,-1)
34.85 2.5745 33.9 (2,2,-2)
35.60 2.5219 2.2 (1,-1,0)
36.32 2.4732 38.9 (2,1,-2)
39.80 2.2648 100.0 (2,0,-1)
51.22 1.7836 12.8 (3,2,-3)
51.23 1.7833 26.4 (1,-1,1)
58.56 1.5762 15.0 (2,-1,-1)
63.46 1.4659 22.7 (3,1,-3)
64.41 1.4465 14.7 (3,0,-2)
65.82 1.4189 23.3 (4,2,-3)
69.06 1.3600 4.3 (4,3,-4)
73.58 1.2872 4.1 (4,4,-4)
75.37 1.2611 8.3 (4,1,-3)
75.38 1.2610 8.0 (2,-2,0)
81.50 1.1810 3.0 (2,-1,-2)
85.81 1.1324 9.6 (4,0,-2)
86.67 1.1234 3.4 (3,0,-3)
88.81 1.1017 19.0 (3,-1,-2)
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Energy Properties

Formation Energy/atom
-0.51094
eV/atom
Energy/atom
-6.97559
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-6.9756
eV/atom
Volume/atom
10.92
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
0.0030
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000050
μB/ų

Elastic Properties

KVRH
174.217
GPa
GVRH
71.075
GPa
Young's Modulus E
187.700
GPa
Poisson Ratio ν
0.320
Pugh Ratio K/G
2.451
Vickers Hardness Est.
5.486
GPa
Ductility
Brittle
Anisotropy
0.436
Lame λ
126.834
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ni · 0.333
Element Family
3d-TM
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
0.6456
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
28.906%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4278
smaller = more stable mixing
VEC
6.500
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-38.829
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9591
SS Former
0
Phase Tendency
AM

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
0.4360
Homogeneous Poisson ν
0.3200
Debye Temperature
574.3
K
Sound Velocity
3,368.1
m/s
Homogeneity
0.3200

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-6092
Reference Citation

The crystal structure and related material properties of TbNi2B2C were obtained from the Materials Project database (MP-ID: mp-6092, 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_TbNi2B2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.73339971
_cell_length_b   5.73339971
_cell_length_c   5.73339971
_cell_angle_alpha   143.75742055
_cell_angle_beta   143.75742055
_cell_angle_gamma   52.19018804
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TbNi2B2C
_chemical_formula_sum   'Tb1 Ni2 B2 C1'
_cell_volume   65.49497409
_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
  Tb  Tb0  1  0.00000000  0.00000000  0.00000000  1.0
  Ni  Ni1  1  0.75000000  0.25000000  0.50000000  1.0
  Ni  Ni2  1  0.25000000  0.75000000  0.50000000  1.0
  B  B3  1  0.35510500  0.35510500  0.00000000  1.0
  B  B4  1  0.64489500  0.64489500  0.00000000  1.0
  C  C5  1  0.50000000  0.50000000  0.00000000  1.0
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