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Cu2GeO4

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-9600 · Space group: I4_1/amd (#141)

Basic Information

Formula
Cu2GeO4
MP-ID
mp-9600
Elements
3
Sites
14
Density
5.3571
g/cm³
Volume
163.50
ų
Cell a
6.5521
Å
Cell b
6.5521
Å
Cell c
6.5521
Å
α Angle
129.45
°
β Angle
129.45
°
γ Angle
74.29
°
Space Group
I4_1/amd
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
17.99 4.9321 2.9 (1,0,-1)
28.30 3.1536 31.8 (2,0,-1)
30.23 2.9562 100.0 (2,1,-2)
31.99 2.7975 12.3 (1,-1,1)
34.34 2.6114 11.9 (2,2,-2)
36.43 2.4660 17.7 (2,0,-2)
36.94 2.4333 75.8 (2,-1,-1)
44.59 2.0319 2.6 (3,0,-2)
45.87 1.9781 11.5 (2,-2,0)
46.39 1.9572 15.3 (3,2,-3)
47.64 1.9090 7.8 (3,1,-3)
54.78 1.6758 10.7 (3,-1,-2)
55.93 1.6440 14.0 (3,0,-3)
57.87 1.5935 4.8 (3,3,-4)
58.54 1.5768 46.7 (4,0,-2)
60.30 1.5349 20.1 (3,-2,-1)
62.87 1.4781 6.6 (4,2,-4)
66.89 1.3987 16.2 (2,-2,2)
67.30 1.3913 4.5 (4,1,-4)
72.37 1.3057 4.6 (4,4,-4)
73.96 1.2816 14.2 (4,3,-5)
74.16 1.2786 2.3 (4,-2,-1)
75.14 1.2644 12.0 (4,-1,-3)
76.08 1.2511 1.9 (3,-3,1)
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Energy Properties

Formation Energy/atom
-1.35581
eV/atom
Energy/atom
-6.01485
eV/atom
Energy above Hull
0.1072
eV/atom
Uncorrected Energy
-5.6223
eV/atom
Volume/atom
11.68
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
3.7539
μB
Mag. Ordering
FM
Mag. Sites
4
Magnetization/Volume
0.022960
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
O · 0.571
Element Family
Metalloid-Nonmetal
Solute Fraction
0.429
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.9557
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.9457
J/mol·K
Ω Parameter
2.4024
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
37.389%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.7447
smaller = more stable mixing
VEC
6.000
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-1.959
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8699
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
B
Score
0.491
Family
O-rich Multi-Component
Matrix Element
O · 0.571

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-9600
Reference Citation

The crystal structure and related material properties of Cu2GeO4 were obtained from the Materials Project database (MP-ID: mp-9600, 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_Cu2GeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.55212658
_cell_length_b   6.55212658
_cell_length_c   6.55212658
_cell_angle_alpha   129.45061624
_cell_angle_beta   129.45061624
_cell_angle_gamma   74.28658571
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu2GeO4
_chemical_formula_sum   'Cu4 Ge2 O8'
_cell_volume   163.49562357
_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
  Cu  Cu0  1  0.87500000  0.12500000  0.75000000  1.0
  Cu  Cu1  1  0.87500000  0.62500000  0.75000000  1.0
  Cu  Cu2  1  0.87500000  0.12500000  0.25000000  1.0
  Cu  Cu3  1  0.37500000  0.12500000  0.25000000  1.0
  Ge  Ge4  1  0.25000000  0.75000000  0.50000000  1.0
  Ge  Ge5  1  0.50000000  0.50000000  0.00000000  1.0
  O  O6  1  0.61139200  0.84831500  0.76307700  1.0
  O  O7  1  0.15168500  0.91476200  0.76307700  1.0
  O  O8  1  0.15168500  0.38860800  0.23692300  1.0
  O  O9  1  0.13860800  0.40168500  0.73692300  1.0
  O  O10  1  0.66476200  0.40168500  0.26307700  1.0
  O  O11  1  0.59831500  0.33523800  0.73692300  1.0
  O  O12  1  0.08523800  0.84831500  0.23692300  1.0
  O  O13  1  0.59831500  0.86139200  0.26307700  1.0
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