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Li2CoNiO4

High-Entropy Materials HEA

MP-ID: mp-753536 · Space group: Imma (#74)

Basic Information

Formula
Li2CoNiO4
MP-ID
mp-753536
Elements
4
Sites
16
Density
4.7671
g/cm³
Volume
136.20
ų
Cell a
5.7909
Å
Cell b
5.7909
Å
Cell c
5.7909
Å
α Angle
120.64
°
β Angle
120.42
°
γ Angle
89.09
°
Space Group
Imma
Point Group
mmm
Crystal System
Orthorhombic
Bravais Lattice
Orthorhombic I
Stability
No
Packing Fraction
0.6800

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
18.80 4.7205 100.0 (1,0,0)
18.84 4.7098 94.0 (0,1,0)
36.19 2.4823 11.5 (2,1,-1)
36.21 2.4807 17.6 (1,2,-1)
36.60 2.4553 26.7 (1,0,1)
36.67 2.4508 26.0 (0,1,1)
38.13 2.3603 20.6 (2,0,0)
38.22 2.3549 20.3 (0,2,0)
43.87 2.0636 47.9 (2,2,-2)
44.61 2.0310 91.3 (0,0,2)
48.45 1.8788 11.7 (2,1,0)
48.51 1.8768 6.9 (1,2,0)
48.74 1.8683 4.1 (2,-1,1)
48.91 1.8624 4.4 (1,-2,-1)
58.13 1.5869 5.5 (3,2,-2)
58.15 1.5865 3.9 (2,3,-2)
58.67 1.5735 1.3 (3,0,0)
58.82 1.5699 2.5 (0,3,0)
59.01 1.5654 9.4 (1,0,2)
59.09 1.5634 9.1 (0,1,2)
64.36 1.4475 50.7 (2,2,0)
64.81 1.4386 12.4 (2,-2,2)
65.05 1.4338 12.3 (2,-2,-2)
67.41 1.3893 4.0 (3,2,-1)
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Energy Properties

Formation Energy/atom
-1.62029
eV/atom
Energy/atom
-6.18569
eV/atom
Energy above Hull
0.0170
eV/atom
Uncorrected Energy
-5.3198
eV/atom
Volume/atom
8.51
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
1.9927
μB
Mag. Ordering
FiM
Mag. Sites
4
Magnetization/Volume
0.014630
μB/ų

Elastic Properties

Elastic data not available

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
1.2130
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
10.0849
J/mol·K
Ω Parameter
0.7944
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
40.672%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
1.0522
smaller = more stable mixing
VEC
4.625
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-7.336
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8750
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (2)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-753536
Reference Citation

The crystal structure and related material properties of Li2CoNiO4 were obtained from the Materials Project database (MP-ID: mp-753536, 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_Li2CoNiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.79090223
_cell_length_b   5.79090223
_cell_length_c   5.79090223
_cell_angle_alpha   120.63744170
_cell_angle_beta   120.41738978
_cell_angle_gamma   89.08899843
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2CoNiO4
_chemical_formula_sum   'Li4 Co2 Ni2 O8'
_cell_volume   136.20282540
_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
  Li  Li0  1  0.50000000  0.00000000  0.00000000  1.0
  Li  Li1  1  0.50000000  0.50000000  0.00000000  1.0
  Li  Li2  1  0.00000000  0.50000000  0.50000000  1.0
  Li  Li3  1  0.50000000  0.50000000  0.50000000  1.0
  Co  Co4  1  0.00000000  0.50000000  0.00000000  1.0
  Co  Co5  1  0.00000000  0.00000000  0.50000000  1.0
  Ni  Ni6  1  0.50000000  0.00000000  0.50000000  1.0
  Ni  Ni7  1  0.00000000  0.00000000  0.00000000  1.0
  O  O8  1  0.77148100  0.74983500  0.02164600  1.0
  O  O9  1  0.76616700  0.24797200  0.98180500  1.0
  O  O10  1  0.23383300  0.21563800  0.48180500  1.0
  O  O11  1  0.77181100  0.25016500  0.52164600  1.0
  O  O12  1  0.22818900  0.74983500  0.47835400  1.0
  O  O13  1  0.76616700  0.78436200  0.51819500  1.0
  O  O14  1  0.23383300  0.75202800  0.01819500  1.0
  O  O15  1  0.22851900  0.25016500  0.97835400  1.0
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