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CdC2O7

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1182178 · Space group: P-1 (#2)

Basic Information

Formula
CdC2O7
MP-ID
mp-1182178
Elements
3
Sites
20
Density
2.1602
g/cm³
Volume
381.93
ų
Cell a
6.0139
Å
Cell b
7.2767
Å
Cell c
9.3830
Å
α Angle
97.98
°
β Angle
103.17
°
γ Angle
102.86
°
Space Group
P-1
Point Group
-1
Crystal System
Triclinic
Bravais Lattice
Triclinic 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
9.88 8.9521 42.8 (0,0,1)
12.73 6.9512 43.9 (0,1,0)
14.49 6.1135 100.0 (0,1,-1)
15.69 5.6484 2.3 (1,0,0)
16.15 5.4866 56.6 (1,0,-1)
17.43 5.0894 30.1 (1,-1,0)
17.65 5.0257 5.8 (0,1,1)
19.22 4.6175 23.2 (1,-1,-1)
19.84 4.4761 20.8 (0,0,2)
20.72 4.2866 45.6 (1,0,1)
20.88 4.2536 2.5 (1,-1,1)
21.36 4.1605 23.2 (0,1,-2)
21.78 4.0807 2.1 (1,0,-2)
21.94 4.0512 1.9 (1,1,-1)
22.75 3.9082 4.2 (1,1,0)
25.21 3.5322 15.9 (1,-1,-2)
25.40 3.5062 15.8 (1,1,-2)
25.57 3.4831 26.7 (0,2,-1)
25.63 3.4756 17.4 (0,2,0)
25.73 3.4618 14.0 (0,1,2)
26.33 3.3852 1.5 (1,-2,0)
27.49 3.2450 13.9 (1,1,1)
27.77 3.2127 24.0 (1,-1,2)
27.86 3.2025 4.4 (1,-2,1)
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Energy Properties

Formation Energy/atom
-0.77511
eV/atom
Energy/atom
-6.18088
eV/atom
Energy above Hull
0.6330
eV/atom
Uncorrected Energy
-6.0682
eV/atom
Volume/atom
19.10
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
6.0006
μB
Mag. Ordering
FM
Mag. Sites
6
Magnetization/Volume
0.015710
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
O · 0.700
Element Family
Metalloid-Nonmetal
Solute Fraction
0.300
Interstitial Fraction
0.200

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.8018
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
6.6663
J/mol·K
Ω Parameter
2.5258
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
37.258%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.5831
smaller = more stable mixing
VEC
4.800
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-2.276
kJ/mol; negative = exothermic mixing
Entropy Norm
0.7298
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
C
Score
0.433
Family
Interstitial Alloy
Matrix Element
O · 0.700

Related Tasks

Related computation task IDs (2)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1182178
Reference Citation

The crystal structure and related material properties of CdC2O7 were obtained from the Materials Project database (MP-ID: mp-1182178, 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_CdC2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.01389400
_cell_length_b   7.27671070
_cell_length_c   9.38301949
_cell_angle_alpha   97.97962723
_cell_angle_beta   103.17238160
_cell_angle_gamma   102.86338223
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CdC2O7
_chemical_formula_sum   'Cd2 C4 O14'
_cell_volume   381.92607104
_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
  Cd  Cd0  1  0.22512000  0.67273400  0.18275600  1.0
  Cd  Cd1  1  0.77488000  0.32726600  0.81724400  1.0
  C  C2  1  0.38336700  0.42875000  0.94748400  1.0
  C  C3  1  0.61663300  0.57125000  0.05251600  1.0
  C  C4  1  0.25444100  0.29780400  0.40638600  1.0
  C  C5  1  0.74555900  0.70219600  0.59361400  1.0
  O  O6  1  0.19116500  0.44746800  0.97705500  1.0
  O  O7  1  0.80883500  0.55253200  0.02294500  1.0
  O  O8  1  0.39728300  0.30769600  0.84313100  1.0
  O  O9  1  0.60271700  0.69230400  0.15686900  1.0
  O  O10  1  0.14776700  0.33702100  0.29800300  1.0
  O  O11  1  0.85223300  0.66297900  0.70199700  1.0
  O  O12  1  0.36658900  0.26430600  0.51441700  1.0
  O  O13  1  0.63341100  0.73569400  0.48558300  1.0
  O  O14  1  0.13886600  0.83440200  0.34996200  1.0
  O  O15  1  0.86113400  0.16559800  0.65003800  1.0
  O  O16  1  0.43060200  0.07119100  0.15985000  1.0
  O  O17  1  0.56939800  0.92880900  0.84014900  1.0
  O  O18  1  0.62132800  0.16946800  0.24588000  1.0
  O  O19  1  0.37867200  0.83053200  0.75412000  1.0
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