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CaCu2O3

High-Entropy Materials HEA Traditional Materials TRA Elasticity Data ELA

MP-ID: mp-7466 · Space group: Pmmn (#59)

Basic Information

Formula
CaCu2O3
MP-ID
mp-7466
Elements
3
Sites
12
Density
4.6898
g/cm³
Volume
152.37
ų
Cell a
3.6513
Å
Cell b
4.1363
Å
Cell c
10.0891
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
Pmmn
Point Group
mmm
Crystal System
Orthorhombic
Bravais Lattice
Orthorhombic 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
17.58 5.0445 6.1 (0,0,2)
23.24 3.8271 12.5 (0,1,1)
24.38 3.6513 49.8 (1,0,0)
25.95 3.4334 25.4 (1,0,1)
30.22 2.9578 89.9 (1,0,2)
32.72 2.7373 97.5 (1,1,0)
33.93 2.6418 39.4 (1,1,1)
34.37 2.6094 100.0 (0,1,3)
35.59 2.5223 3.7 (0,0,4)
36.32 2.4737 85.8 (1,0,3)
42.59 2.1230 15.9 (1,1,3)
43.61 2.0753 36.6 (1,0,4)
43.77 2.0681 75.1 (0,2,0)
47.52 1.9136 1.2 (0,2,2)
50.73 1.7995 12.3 (1,2,0)
50.83 1.7965 22.5 (2,0,1)
51.59 1.7716 6.4 (1,2,1)
51.76 1.7661 1.8 (1,0,5)
54.11 1.6949 29.0 (1,2,2)
54.58 1.6815 35.8 (0,0,6)
54.98 1.6702 4.8 (2,1,0)
56.67 1.6242 6.8 (1,1,5)
57.43 1.6045 23.2 (2,0,3)
57.64 1.5993 1.8 (0,2,4)
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Energy Properties

Formation Energy/atom
-1.72333
eV/atom
Energy/atom
-5.89797
eV/atom
Energy above Hull
0.0313
eV/atom
Uncorrected Energy
-5.5545
eV/atom
Volume/atom
12.70
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
0.0005
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų

Elastic Properties

KVRH
77.591
GPa
GVRH
29.185
GPa
Young's Modulus E
77.800
GPa
Poisson Ratio ν
0.333
Pugh Ratio K/G
2.659
Vickers Hardness Est.
1.585
GPa
Ductility
Brittle
Anisotropy
2.394
Lame λ
58.134
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
O · 0.500
Element Family
Metalloid-Nonmetal
Solute Fraction
0.500
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0114
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
8.4088
J/mol·K
Ω Parameter
1.7998
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
48.325%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.9677
smaller = more stable mixing
VEC
6.000
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-3.111
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9206
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
B
Score
0.497
Family
O-rich Multi-Component
Matrix Element
O · 0.500

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
2.3940
Homogeneous Poisson ν
0.3330
Debye Temperature
388.3
K
Sound Velocity
2,798.3
m/s
Homogeneity
0.3330

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-7466
Reference Citation

The crystal structure and related material properties of CaCu2O3 were obtained from the Materials Project database (MP-ID: mp-7466, 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_CaCu2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.65127000
_cell_length_b   4.13628300
_cell_length_c   10.08905500
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CaCu2O3
_chemical_formula_sum   'Ca2 Cu4 O6'
_cell_volume   152.37183000
_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
  Ca  Ca0  1  0.38777800  0.00000000  0.00000000  1.0
  Ca  Ca1  1  0.61222200  0.50000000  0.50000000  1.0
  Cu  Cu2  1  0.12527900  0.00000000  0.66370300  1.0
  Cu  Cu3  1  0.12527900  0.00000000  0.33629700  1.0
  Cu  Cu4  1  0.87472100  0.50000000  0.83629700  1.0
  Cu  Cu5  1  0.87472100  0.50000000  0.16370300  1.0
  O  O6  1  0.63277300  0.50000000  0.00000000  1.0
  O  O7  1  0.36722700  0.00000000  0.50000000  1.0
  O  O8  1  0.91157800  0.00000000  0.16511800  1.0
  O  O9  1  0.08842200  0.50000000  0.66511800  1.0
  O  O10  1  0.08842200  0.50000000  0.33488200  1.0
  O  O11  1  0.91157800  0.00000000  0.83488200  1.0
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