HoTm4Bi2Pt
High-Entropy Materials HEAMP-ID: mp-3294427 · Space group: Pnma (#62)
Basic Information
Formula
HoTm4Bi2Pt
MP-ID
mp-3294427
Elements
4
Sites
32
Density
11.1103
g/cm³
Volume
869.08
ų
Cell a
7.9676
Å
Cell b
8.9044
Å
Cell c
12.2498
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
Pnma
Point Group
mmm
Crystal System
Orthorhombic
Bravais Lattice
oP
Stability
Yes
Packing Fraction
-
X-ray Diffraction
Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å
Diffraction Peaks (Top 24)
| 2θ | d (Å) | I | hkl |
|---|---|---|---|
| 14.46 | 6.1249 | 2.5 | (0,0,2) |
| 14.92 | 5.9376 | 4.3 | (1,1,0) |
| 20.84 | 4.2632 | 2.2 | (1,1,2) |
| 22.32 | 3.9838 | 7.4 | (2,0,0) |
| 23.48 | 3.7885 | 1.9 | (2,0,1) |
| 24.02 | 3.7046 | 7.9 | (1,2,1) |
| 24.50 | 3.6339 | 15.8 | (1,0,3) |
| 24.72 | 3.6013 | 3.3 | (0,2,2) |
| 27.17 | 3.2816 | 12.4 | (1,2,2) |
| 28.55 | 3.1269 | 3.5 | (2,1,2) |
| 29.16 | 3.0624 | 5.3 | (0,0,4) |
| 30.99 | 2.8853 | 100.0 | (2,2,1) |
| 31.29 | 2.8586 | 59.6 | (1,0,4) |
| 31.37 | 2.8515 | 22.8 | (2,0,3) |
| 31.79 | 2.8152 | 71.4 | (1,2,3) |
| 32.18 | 2.7814 | 20.1 | (1,3,0) |
| 32.91 | 2.7218 | 9.2 | (1,1,4) |
| 33.02 | 2.7124 | 4.3 | (1,3,1) |
| 33.54 | 2.6715 | 66.8 | (2,2,2) |
| 33.55 | 2.6710 | 2.7 | (0,3,2) |
| 34.56 | 2.5956 | 23.9 | (3,0,1) |
| 35.26 | 2.5451 | 4.2 | (3,1,0) |
| 35.45 | 2.5325 | 9.6 | (1,3,2) |
| 35.58 | 2.5232 | 36.6 | (0,2,4) |
Energy Properties
Formation Energy/atom
-0.94613
eV/atom
Energy/atom
-43.67835
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-43.6784
eV/atom
Volume/atom
27.16
ų
c/a Ratio
1.5375
Electronic Properties
Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV
Magnetic Properties
Magnetic
Yes
Total Mag. Moment
3.7499
μB
Mag. Ordering
FM
Mag. Sites
20
Magnetization/Volume
0.004310
μB/ų
Elastic Properties
Elastic data not available
Feature Analysis
Composition Overview
Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Tm · 0.500
Element Family
Lanthanide
Solute Fraction
0.500
Interstitial Fraction
0.000
High-Entropy Alloy Features
Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.2130
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
10.0849
J/mol·K
Ω Parameter
24.0382
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
7.349%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4234
smaller = more stable mixing
VEC
10.375
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
0.636
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8750
SS Former
0
Phase Tendency
IM
Related Tasks
Related computation task IDs (1)
Citation & References
Materials Project Page
https://materialsproject.org/materials/mp-3294427
Reference Citation
The crystal structure and related material properties of HoTm4Bi2Pt were obtained from the Materials Project database (MP-ID: mp-3294427, 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
3D Crystal Structure Rendering
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Raw CIF Data
# generated using pymatgen
data_HoTm4Bi2Pt
_symmetry_space_group_name_H-M 'P 1'
_cell_length_a 7.96759893
_cell_length_b 8.90441339
_cell_length_c 12.24975029
_cell_angle_alpha 90.00000000
_cell_angle_beta 90.00000000
_cell_angle_gamma 90.00000000
_symmetry_Int_Tables_number 1
_chemical_formula_structural HoTm4Bi2Pt
_chemical_formula_sum 'Ho4 Tm16 Bi8 Pt4'
_cell_volume 869.08051829
_cell_formula_units_Z 4
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
Ho Ho0 1 0.62660738 0.75000000 0.30540414 1.0
Ho Ho1 1 0.87339262 0.75000000 0.80540414 1.0
Ho Ho2 1 0.37339262 0.25000000 0.69459586 1.0
Ho Ho3 1 0.12660738 0.25000000 0.19459586 1.0
Tm Tm4 1 0.16485782 0.75000000 0.20918967 1.0
Tm Tm5 1 0.33514218 0.75000000 0.70918967 1.0
Tm Tm6 1 0.83514218 0.25000000 0.79081033 1.0
Tm Tm7 1 0.66485782 0.25000000 0.29081033 1.0
Tm Tm8 1 0.44563113 0.75000000 0.99988143 1.0
Tm Tm9 1 0.05436887 0.75000000 0.49988143 1.0
Tm Tm10 1 0.55436887 0.25000000 0.00011857 1.0
Tm Tm11 1 0.94563113 0.25000000 0.50011857 1.0
Tm Tm12 1 0.82331070 0.54438968 0.06738963 1.0
Tm Tm13 1 0.67668930 0.95561032 0.56738963 1.0
Tm Tm14 1 0.17668930 0.04438968 0.93261037 1.0
Tm Tm15 1 0.32331070 0.45561032 0.43261037 1.0
Tm Tm16 1 0.17668930 0.45561032 0.93261037 1.0
Tm Tm17 1 0.32331070 0.04438968 0.43261037 1.0
Tm Tm18 1 0.82331070 0.95561032 0.06738963 1.0
Tm Tm19 1 0.67668930 0.54438968 0.56738963 1.0
Bi Bi20 1 0.93501272 0.51033747 0.32788707 1.0
Bi Bi21 1 0.56498728 0.98966253 0.82788707 1.0
Bi Bi22 1 0.06498728 0.01033747 0.67211293 1.0
Bi Bi23 1 0.43501272 0.48966253 0.17211293 1.0
Bi Bi24 1 0.06498728 0.48966253 0.67211293 1.0
Bi Bi25 1 0.43501272 0.01033747 0.17211293 1.0
Bi Bi26 1 0.93501272 0.98966253 0.32788707 1.0
Bi Bi27 1 0.56498728 0.51033747 0.82788707 1.0
Pt Pt28 1 0.42352914 0.75000000 0.49023823 1.0
Pt Pt29 1 0.07647086 0.75000000 0.99023823 1.0
Pt Pt30 1 0.57647086 0.25000000 0.50976177 1.0
Pt Pt31 1 0.92352914 0.25000000 0.00976177 1.0
