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CuPb2(OF)2

High-Entropy Materials HEA

MP-ID: mp-1147765 · Space group: I4/mmm (#139)

Basic Information

Formula
CuPb2(OF)2
MP-ID
mp-1147765
Elements
4
Sites
7
Density
7.6148
g/cm³
Volume
119.49
ų
Cell a
7.8644
Å
Cell b
7.8644
Å
Cell c
7.8644
Å
α Angle
150.25
°
β Angle
150.25
°
γ Angle
42.58
°
Space Group
I4/mmm
Point Group
4/mmm
Crystal System
Tetragonal
Bravais Lattice
Tetragonal I
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
12.08 7.3278 13.7 (1,1,-1)
22.84 3.8930 13.0 (1,0,-1)
28.68 3.1124 100.0 (2,1,-2)
31.33 2.8554 28.4 (1,-1,0)
33.69 2.6605 6.2 (2,0,-1)
36.80 2.4426 13.4 (3,3,-3)
37.93 2.3721 4.6 (3,2,-3)
40.03 2.2522 7.0 (3,1,-2)
44.89 2.0191 19.6 (1,-1,1)
46.66 1.9465 2.2 (2,0,-2)
49.01 1.8587 1.5 (4,3,-4)
49.08 1.8561 22.7 (4,2,-3)
50.95 1.7923 3.4 (2,-1,-1)
54.15 1.6939 34.9 (3,0,-2)
59.39 1.5562 13.6 (4,2,-4)
60.00 1.5419 2.7 (5,3,-4)
60.19 1.5375 2.6 (4,1,-3)
61.39 1.5102 11.9 (5,4,-5)
65.36 1.4277 6.2 (2,-2,0)
68.63 1.3675 1.2 (5,2,-4)
72.89 1.2977 7.3 (3,0,-3)
74.27 1.2770 5.5 (2,-2,1)
75.59 1.2580 1.4 (3,-1,-2)
77.43 1.2326 6.4 (5,1,-3)
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Energy Properties

Formation Energy/atom
-1.58453
eV/atom
Energy/atom
-5.19161
eV/atom
Energy above Hull
0.2609
eV/atom
Uncorrected Energy
-4.8633
eV/atom
Volume/atom
17.07
ų
c/a Ratio
1.0000

Electronic Properties

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

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
0.3190
μB
Mag. Ordering
FM
Mag. Sites
1
Magnetization/Volume
0.002670
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Pb · 0.286
Element Family
PostTransition-Noble
Solute Fraction
0.714
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.3518
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
11.2387
J/mol·K
Ω Parameter
4.5496
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
53.917%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.7922
smaller = more stable mixing
VEC
5.286
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
0.980
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9751
SS Former
0
Phase Tendency
IM

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1147765
Reference Citation

The crystal structure and related material properties of CuPb2(OF)2 were obtained from the Materials Project database (MP-ID: mp-1147765, 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_CuPb2(OF)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.86442235
_cell_length_b   7.86442235
_cell_length_c   7.86442235
_cell_angle_alpha   150.24755121
_cell_angle_beta   150.24755121
_cell_angle_gamma   42.57814593
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CuPb2(OF)2
_chemical_formula_sum   'Cu1 Pb2 O2 F2'
_cell_volume   119.48791060
_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
  Cu  Cu0  1  0.00000000  0.00000000  0.00000000  1.0
  Pb  Pb1  1  0.33222100  0.33222100  0.00000000  1.0
  Pb  Pb2  1  0.66777900  0.66777900  0.00000000  1.0
  O  O3  1  0.75000000  0.25000000  0.50000000  1.0
  O  O4  1  0.25000000  0.75000000  0.50000000  1.0
  F  F5  1  0.50000000  0.00000000  0.50000000  1.0
  F  F6  1  0.00000000  0.50000000  0.50000000  1.0
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