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Ce2Cu(NO)2

High-Entropy Materials HEA Elasticity Data ELA

MP-ID: mp-1022723 · Space group: I4/mmm (#139)

Basic Information

Formula
Ce2Cu(NO)2
MP-ID
mp-1022723
Elements
4
Sites
7
Density
7.2101
g/cm³
Volume
93.00
ų
Cell a
6.6366
Å
Cell b
6.6366
Å
Cell c
6.6366
Å
α Angle
145.57
°
β Angle
145.57
°
γ Angle
49.48
°
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
23.83 3.7347 15.8 (1,0,-1)
29.64 3.0137 2.0 (2,2,-2)
31.86 2.8089 100.0 (2,1,-2)
32.23 2.7775 35.0 (1,-1,0)
44.07 2.0548 1.3 (3,2,-3)
44.35 2.0424 15.2 (3,1,-2)
45.13 2.0091 7.9 (3,3,-3)
46.22 1.9640 25.3 (1,-1,1)
52.65 1.7383 3.8 (2,-1,-1)
55.88 1.6454 2.0 (3,1,-3)
56.53 1.6279 14.8 (4,2,-3)
57.24 1.6096 36.9 (3,0,-2)
58.52 1.5772 5.8 (4,3,-4)
61.54 1.5069 1.1 (4,4,-4)
66.59 1.4044 9.6 (4,2,-4)
67.44 1.3887 7.6 (2,-2,0)
74.90 1.2678 4.4 (5,4,-5)
76.52 1.2449 7.7 (3,0,-3)
76.73 1.2421 6.3 (2,-2,1)
77.64 1.2297 5.2 (5,2,-4)
80.31 1.1955 1.9 (5,3,-5)
84.33 1.1484 4.3 (4,0,-3)
84.88 1.1424 4.9 (5,1,-3)
88.40 1.1058 2.4 (5,5,-6)
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Energy Properties

Formation Energy/atom
-1.82636
eV/atom
Energy/atom
-7.90431
eV/atom
Energy above Hull
0.3845
eV/atom
Uncorrected Energy
-7.7080
eV/atom
Volume/atom
13.29
ų
c/a Ratio
1.0000

Electronic Properties

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

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0345
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000370
μB/ų

Elastic Properties

KVRH
145.569
GPa
GVRH
60.588
GPa
Young's Modulus E
159.619
GPa
Poisson Ratio ν
0.317
Pugh Ratio K/G
2.403
Vickers Hardness Est.
4.913
GPa
Ductility
Brittle
Anisotropy
1.496
Lame λ
105.177
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ce · 0.286
Element Family
Lanthanide
Solute Fraction
0.714
Interstitial Fraction
0.286

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
0.1293
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
47.515%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.9634
smaller = more stable mixing
VEC
5.000
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-46.316
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9751
SS Former
0
Phase Tendency
AM

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
1.4960
Homogeneous Poisson ν
0.3170
Debye Temperature
419.2
K
Sound Velocity
3,245.1
m/s
Homogeneity
0.3170

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1022723
Reference Citation

The crystal structure and related material properties of Ce2Cu(NO)2 were obtained from the Materials Project database (MP-ID: mp-1022723, 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_Ce2Cu(NO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.63658582
_cell_length_b   6.63658582
_cell_length_c   6.63658582
_cell_angle_alpha   145.57313690
_cell_angle_beta   145.57313690
_cell_angle_gamma   49.48123566
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ce2Cu(NO)2
_chemical_formula_sum   'Ce2 Cu1 N2 O2'
_cell_volume   92.99616592
_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
  Ce  Ce0  1  0.65110400  0.65110400  0.00000000  1.0
  Ce  Ce1  1  0.34889600  0.34889600  0.00000000  1.0
  Cu  Cu2  1  0.00000000  0.00000000  0.00000000  1.0
  N  N3  1  0.25000000  0.75000000  0.50000000  1.0
  N  N4  1  0.75000000  0.25000000  0.50000000  1.0
  O  O5  1  0.00000000  0.50000000  0.50000000  1.0
  O  O6  1  0.50000000  0.00000000  0.50000000  1.0
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