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Tb9Lu(PPb3)2

High-Entropy Materials HEA

MP-ID: mp-3296142 · Space group: P312 (#149)

Basic Information

Formula
Tb9Lu(PPb3)2
MP-ID
mp-3296142
Elements
4
Sites
18
Density
9.8327
g/cm³
Volume
491.51
ų
Cell a
9.1045
Å
Cell b
9.1045
Å
Cell c
6.8469
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
120.00
°
Space Group
P312
Point Group
32
Crystal System
Trigonal
Bravais Lattice
Trigonal P
Stability
No
Packing Fraction
0.7400

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
11.22 7.8847 1.3 (0,1,-1,0)
11.22 7.8847 2.7 (1,0,-1,0)
23.47 3.7909 6.1 (2,-1,-1,1)
26.03 3.4234 21.7 (0,0,0,2)
28.42 3.1402 6.7 (1,0,-1,2)
29.98 2.9802 21.2 (3,-1,-2,0)
32.73 2.7361 77.3 (2,-1,-1,2)
32.77 2.7325 100.0 (3,-1,-2,1)
34.11 2.6282 35.5 (3,0,-3,0)
34.70 2.5849 11.5 (2,0,-2,2)
41.28 2.1868 5.6 (4,-1,-3,0)
41.82 2.1599 6.2 (2,2,-4,1)
41.82 2.1599 3.1 (4,-2,-2,1)
43.44 2.0832 19.2 (4,-1,-3,1)
44.40 2.0402 1.3 (2,-1,-1,3)
48.00 1.8954 14.0 (4,-2,-2,2)
50.36 1.8120 30.3 (3,-1,-2,3)
52.31 1.7489 3.6 (3,2,-5,1)
52.31 1.7489 1.8 (5,-2,-3,1)
53.24 1.7206 2.3 (1,4,-5,0)
53.24 1.7206 4.7 (5,-1,-4,0)
53.54 1.7117 11.9 (0,0,0,4)
53.65 1.7083 2.5 (0,4,-4,2)
53.65 1.7083 4.9 (4,0,-4,2)
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Energy Properties

Formation Energy/atom
-1.01501
eV/atom
Energy/atom
-38.50572
eV/atom
Energy above Hull
0.0002
eV/atom
Uncorrected Energy
-38.5057
eV/atom
Volume/atom
27.31
ų
c/a Ratio
0.7520

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0000
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Tb · 0.500
Element Family
Lanthanide
Solute Fraction
0.500
Interstitial Fraction
0.111

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.1175
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.2908
J/mol·K
Ω Parameter
2.6249
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
12.175%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.5880
smaller = more stable mixing
VEC
6.500
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-4.095
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8061
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3296142
Reference Citation

The crystal structure and related material properties of Tb9Lu(PPb3)2 were obtained from the Materials Project database (MP-ID: mp-3296142, 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_Tb9Lu(PPb3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.10450549
_cell_length_b   9.10450629
_cell_length_c   6.84688190
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   119.99999709
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tb9Lu(PPb3)2
_chemical_formula_sum   'Tb9 Lu1 P2 Pb6'
_cell_volume   491.51439752
_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  0.23720022  0.99953496  0.24921402  1.0
  Tb  Tb1  1  0.76233474  0.99953496  0.75078598  1.0
  Tb  Tb2  1  0.00046504  0.23766526  0.24921402  1.0
  Tb  Tb3  1  0.33333300  0.66666700  0.50000000  1.0
  Tb  Tb4  1  0.66666700  0.33333300  0.50000000  1.0
  Tb  Tb5  1  0.66666700  0.33333300  0.00000000  1.0
  Tb  Tb6  1  0.00046504  0.76279978  0.75078598  1.0
  Tb  Tb7  1  0.23720022  0.23766526  0.75078598  1.0
  Tb  Tb8  1  0.76233474  0.76279978  0.24921402  1.0
  Lu  Lu9  1  0.33333300  0.66666700  0.00000000  1.0
  P  P10  1  0.00000000  0.00000000  0.00000000  1.0
  P  P11  1  0.00000000  0.00000000  0.50000000  1.0
  Pb  Pb12  1  0.40019399  0.99837485  0.75276359  1.0
  Pb  Pb13  1  0.00162515  0.40181914  0.75276359  1.0
  Pb  Pb14  1  0.40019399  0.40181914  0.24723641  1.0
  Pb  Pb15  1  0.59818086  0.99837485  0.24723641  1.0
  Pb  Pb16  1  0.00162515  0.59980601  0.24723641  1.0
  Pb  Pb17  1  0.59818086  0.59980601  0.75276359  1.0
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