Navigation

HEAS Data Platform · Materials Science Database

Tm3ReB7

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-865404 · Space group: Cmcm (#63)

Basic Information

Formula
Tm3ReB7
MP-ID
mp-865404
Elements
3
Sites
22
Density
10.1786
g/cm³
Volume
250.81
ų
Cell a
7.9726
Å
Cell b
7.9726
Å
Cell c
9.2678
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
154.80
°
Space Group
Cmcm
Point Group
mmm
Crystal System
Orthorhombic
Bravais Lattice
Orthorhombic 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
11.37 7.7806 8.8 (1,-1,0)
14.87 5.9590 1.4 (1,-1,1)
19.15 4.6339 5.8 (0,0,2)
22.33 3.9813 3.9 (1,-1,2)
22.86 3.8903 2.1 (2,-2,0)
24.82 3.5871 4.8 (2,-2,1)
26.25 3.3944 100.0 (1,0,0)
27.99 3.1874 20.3 (1,0,1)
29.99 2.9795 72.6 (2,-2,2)
30.96 2.8888 1.5 (2,-1,0)
31.15 2.8712 64.9 (1,-1,3)
32.46 2.7580 11.3 (2,-1,1)
34.58 2.5935 31.5 (3,-3,0)
35.96 2.4976 23.0 (3,-3,1)
36.66 2.4515 16.1 (2,-1,2)
37.16 2.4193 19.7 (2,-2,3)
38.83 2.3193 23.4 (3,-2,0)
38.87 2.3170 15.3 (0,0,4)
39.44 2.2847 78.3 (1,0,3)
40.08 2.2499 58.1 (3,-2,1)
42.86 2.1100 24.3 (2,-1,3)
43.64 2.0740 24.6 (3,-2,2)
45.57 1.9906 5.5 (2,-2,4)
46.70 1.9451 2.8 (4,-4,0)
Get direct link

Energy Properties

Formation Energy/atom
-0.66356
eV/atom
Energy/atom
-7.26823
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-19.7585
eV/atom
Volume/atom
11.40
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
0.6777
μB
Mag. Ordering
FM
Mag. Sites
2
Magnetization/Volume
0.002700
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
B · 0.636
Element Family
Metalloid-Nonmetal
Solute Fraction
0.364
Interstitial Fraction
0.636

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.8600
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.1498
J/mol·K
Ω Parameter
7.1677
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
32.055%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.3463
smaller = more stable mixing
VEC
6.091
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-2.299
kJ/mol; negative = exothermic mixing
Entropy Norm
0.7828
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
B
Score
0.557
Family
Interstitial Alloy
Matrix Element
B · 0.636

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-865404
Reference Citation

The crystal structure and related material properties of Tm3ReB7 were obtained from the Materials Project database (MP-ID: mp-865404, 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_Tm3ReB7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.97255815
_cell_length_b   7.97255815
_cell_length_c   9.26778776
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   154.80090764
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tm3ReB7
_chemical_formula_sum   'Tm6 Re2 B14'
_cell_volume   250.80800007
_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
  Tm  Tm0  1  0.89438626  0.10561374  0.05927904  1.0
  Tm  Tm1  1  0.10561374  0.89438626  0.55927904  1.0
  Tm  Tm2  1  0.10561374  0.89438626  0.94072096  1.0
  Tm  Tm3  1  0.89438626  0.10561374  0.44072096  1.0
  Tm  Tm4  1  0.24295390  0.75704610  0.25000000  1.0
  Tm  Tm5  1  0.75704610  0.24295390  0.75000000  1.0
  Re  Re6  1  0.05286665  0.94713335  0.25000000  1.0
  Re  Re7  1  0.94713335  0.05286665  0.75000000  1.0
  B  B8  1  0.45344836  0.54655164  0.25000000  1.0
  B  B9  1  0.54655164  0.45344836  0.75000000  1.0
  B  B10  1  0.72766965  0.27233035  0.03439758  1.0
  B  B11  1  0.27233035  0.72766965  0.53439758  1.0
  B  B12  1  0.27233035  0.72766965  0.96560242  1.0
  B  B13  1  0.72766965  0.27233035  0.46560242  1.0
  B  B14  1  0.63268924  0.36731076  0.35055993  1.0
  B  B15  1  0.36731076  0.63268924  0.85055993  1.0
  B  B16  1  0.36731076  0.63268924  0.64944007  1.0
  B  B17  1  0.63268924  0.36731076  0.14944007  1.0
  B  B18  1  0.51946557  0.48053443  0.40565835  1.0
  B  B19  1  0.48053443  0.51946557  0.90565835  1.0
  B  B20  1  0.48053443  0.51946557  0.59434165  1.0
  B  B21  1  0.51946557  0.48053443  0.09434165  1.0
Get direct link