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Tl2Cu(I2N)4

High-Entropy Materials HEA

MP-ID: mp-731600 · Space group: P2_1/c (#14)

Basic Information

Formula
Tl2Cu(I2N)4
MP-ID
mp-731600
Elements
4
Sites
30
Density
4.3385
g/cm³
Volume
1,181.59
ų
Cell a
14.6144
Å
Cell b
7.6631
Å
Cell c
11.1595
Å
α Angle
70.99
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P2_1/c
Point Group
2/m
Crystal System
Monoclinic
Bravais Lattice
Monoclinic P
Stability
No
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
10.34 8.5544 6.9 (1,0,1)
12.11 7.3072 21.2 (2,0,0)
12.36 7.1593 7.7 (0,1,1)
13.77 6.4293 100.0 (1,1,1)
14.75 6.0072 2.1 (2,0,1)
16.81 5.2753 30.5 (0,0,2)
16.95 5.2300 3.2 (0,1,-1)
17.24 5.1449 5.6 (2,1,0)
17.34 5.1139 2.6 (2,1,1)
17.88 4.9620 1.3 (1,0,2)
18.01 4.9242 23.0 (1,1,-1)
18.32 4.8440 20.5 (1,1,2)
20.08 4.4228 75.5 (3,0,1)
20.77 4.2772 2.6 (2,0,2)
20.89 4.2529 15.6 (2,1,-1)
21.15 4.2009 20.0 (2,1,2)
22.07 4.0275 1.4 (3,1,1)
24.01 3.7057 4.1 (1,2,1)
24.27 3.6679 48.2 (0,1,3)
24.36 3.6536 58.3 (4,0,0)
24.57 3.6225 24.8 (0,2,0)
24.66 3.6104 31.2 (1,1,-2)
24.87 3.5796 11.7 (0,2,2)
24.98 3.5647 4.1 (3,1,-1)
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Energy Properties

Formation Energy/atom
-0.13824
eV/atom
Energy/atom
-3.76406
eV/atom
Energy above Hull
0.3029
eV/atom
Uncorrected Energy
-3.6678
eV/atom
Volume/atom
39.39
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
1.6670
μB
Mag. Ordering
FM
Mag. Sites
2
Magnetization/Volume
0.001410
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
I · 0.533
Element Family
Metalloid-Nonmetal
Solute Fraction
0.467
Interstitial Fraction
0.267

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.1369
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.4523
J/mol·K
Ω Parameter
0.3923
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
25.824%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.4620
smaller = more stable mixing
VEC
5.133
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-9.412
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8201
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (2)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-731600
Reference Citation

The crystal structure and related material properties of Tl2Cu(I2N)4 were obtained from the Materials Project database (MP-ID: mp-731600, 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_Tl2Cu(I2N)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.61440500
_cell_length_b   7.66312100
_cell_length_c   11.15947533
_cell_angle_alpha   70.98642302
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tl2Cu(I2N)4
_chemical_formula_sum   'Tl4 Cu2 I16 N8'
_cell_volume   1181.58566813
_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
  Tl  Tl0  1  0.31281000  0.31655500  0.00018200  1.0
  Tl  Tl1  1  0.18719000  0.81655500  0.50018200  1.0
  Tl  Tl2  1  0.68719000  0.68344500  0.99981800  1.0
  Tl  Tl3  1  0.81281000  0.18344500  0.49981800  1.0
  Cu  Cu4  1  0.00000000  0.00000000  0.00000000  1.0
  Cu  Cu5  1  0.50000000  0.50000000  0.50000000  1.0
  I  I6  1  0.36844700  0.68201600  0.96689500  1.0
  I  I7  1  0.13155300  0.18201600  0.46689500  1.0
  I  I8  1  0.63155300  0.31798400  0.03310500  1.0
  I  I9  1  0.86844700  0.81798400  0.53310500  1.0
  I  I10  1  0.34817300  0.20182300  0.78411400  1.0
  I  I11  1  0.15182700  0.70182300  0.28411400  1.0
  I  I12  1  0.65182700  0.79817700  0.21588600  1.0
  I  I13  1  0.84817300  0.29817700  0.71588600  1.0
  I  I14  1  0.37845100  0.06674300  0.22949900  1.0
  I  I15  1  0.12154900  0.56674300  0.72949900  1.0
  I  I16  1  0.62154900  0.93325700  0.77050100  1.0
  I  I17  1  0.87845100  0.43325700  0.27050100  1.0
  I  I18  1  0.10761200  0.27561400  0.04984500  1.0
  I  I19  1  0.39238800  0.77561400  0.54984500  1.0
  I  I20  1  0.89238800  0.72438600  0.95015500  1.0
  I  I21  1  0.60761200  0.22438600  0.45015500  1.0
  N  N22  1  0.84432900  0.07906800  0.14736000  1.0
  N  N23  1  0.65567100  0.57906800  0.64736000  1.0
  N  N24  1  0.15567100  0.92093200  0.85264000  1.0
  N  N25  1  0.34432900  0.42093200  0.35264000  1.0
  N  N26  1  0.09273500  0.97157500  0.88748000  1.0
  N  N27  1  0.40726500  0.47157500  0.38748000  1.0
  N  N28  1  0.90726500  0.02842500  0.11252000  1.0
  N  N29  1  0.59273500  0.52842500  0.61252000  1.0
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