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Tm4CrOsC4

High-Entropy Materials HEA

MP-ID: mp-3308721 · Space group: P2_1/m (#11)

Basic Information

Formula
Tm4CrOsC4
MP-ID
mp-3308721
Elements
4
Sites
20
Density
10.4942
g/cm³
Volume
305.71
ų
Cell a
4.9575
Å
Cell b
6.3905
Å
Cell c
9.6497
Å
α Angle
90.25
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P2_1/m
Point Group
2/m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic P
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
9.16 9.6497 15.8 (0,0,1)
16.61 5.3386 1.2 (0,1,-1)
16.67 5.3175 12.3 (0,1,1)
18.39 4.8248 4.2 (0,0,2)
22.70 3.9170 8.7 (1,1,0)
24.50 3.6328 5.9 (1,1,-1)
24.55 3.6261 2.7 (1,1,1)
25.77 3.4576 7.2 (1,0,2)
27.73 3.2166 2.9 (0,0,3)
27.92 3.1952 2.6 (0,2,0)
29.33 3.0450 9.6 (1,1,-2)
29.41 3.0371 11.6 (1,1,2)
29.49 3.0294 1.7 (0,2,1)
31.07 2.8781 8.5 (0,1,-3)
31.18 2.8682 18.6 (0,1,3)
33.20 2.6984 100.0 (1,0,3)
33.36 2.6857 46.3 (1,2,0)
33.57 2.6693 16.4 (0,2,-2)
33.71 2.6588 26.0 (0,2,2)
34.64 2.5898 61.3 (1,2,-1)
34.70 2.5850 50.9 (1,2,1)
36.09 2.4891 25.9 (1,1,-3)
36.18 2.4826 22.7 (1,1,3)
36.24 2.4788 82.5 (2,0,0)
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Energy Properties

Formation Energy/atom
-0.53182
eV/atom
Energy/atom
-25.36499
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-25.3650
eV/atom
Volume/atom
15.29
ų
c/a Ratio
-

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0059
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000020
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Tm · 0.400
Element Family
Lanthanide
Solute Fraction
0.600
Interstitial Fraction
0.400

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.1936
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.9232
J/mol·K
Ω Parameter
1.9471
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
34.548%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.5939
smaller = more stable mixing
VEC
8.200
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-14.295
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8610
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-3308721
Reference Citation

The crystal structure and related material properties of Tm4CrOsC4 were obtained from the Materials Project database (MP-ID: mp-3308721, 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_Tm4CrOsC4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.95754044
_cell_length_b   6.39047509
_cell_length_c   9.64974207
_cell_angle_alpha   90.24619777
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tm4CrOsC4
_chemical_formula_sum   'Tm8 Cr2 Os2 C8'
_cell_volume   305.71102913
_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  0.25000000  0.68007313  0.55988875  1.0
  Tm  Tm1  1  0.75000000  0.31992687  0.44011125  1.0
  Tm  Tm2  1  0.75000000  0.82424614  0.05573596  1.0
  Tm  Tm3  1  0.25000000  0.17575386  0.94426404  1.0
  Tm  Tm4  1  0.25000000  0.53408818  0.21727873  1.0
  Tm  Tm5  1  0.75000000  0.46591182  0.78272127  1.0
  Tm  Tm6  1  0.75000000  0.96968868  0.71477469  1.0
  Tm  Tm7  1  0.25000000  0.03031132  0.28522531  1.0
  Cr  Cr8  1  0.25000000  0.72258314  0.86332726  1.0
  Cr  Cr9  1  0.75000000  0.27741686  0.13667274  1.0
  Os  Os10  1  0.75000000  0.77865934  0.36427815  1.0
  Os  Os11  1  0.25000000  0.22134066  0.63572185  1.0
  C  C12  1  0.25000000  0.46062160  0.76504384  1.0
  C  C13  1  0.75000000  0.53937840  0.23495616  1.0
  C  C14  1  0.75000000  0.05071197  0.25557443  1.0
  C  C15  1  0.25000000  0.94928803  0.74442557  1.0
  C  C16  1  0.25000000  0.81235699  0.04160257  1.0
  C  C17  1  0.75000000  0.18764301  0.95839743  1.0
  C  C18  1  0.75000000  0.67676890  0.55096239  1.0
  C  C19  1  0.25000000  0.32323110  0.44903761  1.0
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