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Li2Co2NiO6

High-Entropy Materials HEA

MP-ID: mp-754376 · Space group: P-1 (#2)

Basic Information

Formula
Li2Co2NiO6
MP-ID
mp-754376
Elements
4
Sites
22
Density
4.5420
g/cm³
Volume
209.44
ų
Cell a
5.8380
Å
Cell b
5.8793
Å
Cell c
6.5124
Å
α Angle
104.82
°
β Angle
103.42
°
γ Angle
91.18
°
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
18.30 4.8492 100.0 (0,1,-1)
35.86 2.5045 13.2 (2,-1,-1)
36.69 2.4491 11.8 (2,1,0)
37.02 2.4285 11.0 (0,1,2)
37.08 2.4246 4.9 (0,2,-2)
37.68 2.3874 4.2 (2,0,-2)
38.21 2.3556 3.9 (2,0,1)
38.46 2.3405 3.8 (0,2,1)
43.24 2.0922 20.3 (2,-2,0)
44.21 2.0486 19.0 (2,2,-1)
44.54 2.0344 18.4 (0,0,3)
47.83 1.9016 3.6 (2,1,-3)
48.04 1.8940 3.7 (2,-1,2)
48.21 1.8878 3.8 (0,3,0)
56.95 1.6168 4.9 (2,-3,1)
56.97 1.6164 1.5 (0,3,-3)
57.95 1.5914 4.7 (2,3,-2)
58.26 1.5837 4.8 (0,1,-4)
63.23 1.4706 5.0 (2,-2,3)
63.25 1.4702 4.9 (2,2,-4)
63.33 1.4685 5.1 (0,4,-1)
63.79 1.4591 5.4 (4,0,-1)
64.40 1.4468 5.2 (2,-2,-3)
65.85 1.4183 5.0 (2,2,2)
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Energy Properties

Formation Energy/atom
-1.42385
eV/atom
Energy/atom
-6.29226
eV/atom
Energy above Hull
0.0868
eV/atom
Uncorrected Energy
-5.3887
eV/atom
Volume/atom
9.52
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
8.0027
μB
Mag. Ordering
FiM
Mag. Sites
6
Magnetization/Volume
0.038210
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
O · 0.545
Element Family
Metalloid-Nonmetal
Solute Fraction
0.455
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.1685
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.7151
J/mol·K
Ω Parameter
0.7939
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
41.024%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.9993
smaller = more stable mixing
VEC
4.909
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-7.231
kJ/mol; negative = exothermic mixing
Entropy Norm
0.8429
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (1)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-754376
Reference Citation

The crystal structure and related material properties of Li2Co2NiO6 were obtained from the Materials Project database (MP-ID: mp-754376, 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_Li2Co2NiO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.83804400
_cell_length_b   5.87933111
_cell_length_c   6.51238653
_cell_angle_alpha   104.81511290
_cell_angle_beta   103.41722144
_cell_angle_gamma   91.17634874
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2Co2NiO6
_chemical_formula_sum   'Li4 Co4 Ni2 O12'
_cell_volume   209.44120484
_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  0.00000000  0.00000000  0.50000000  1.0
  Li  Li1  1  0.50000000  0.00000000  0.50000000  1.0
  Li  Li2  1  0.67808500  0.65273900  0.15889700  1.0
  Li  Li3  1  0.32191500  0.34726100  0.84110300  1.0
  Co  Co4  1  0.16937900  0.17451700  0.16360800  1.0
  Co  Co5  1  0.66530600  0.16904700  0.16195500  1.0
  Co  Co6  1  0.83062100  0.82548300  0.83639200  1.0
  Co  Co7  1  0.33469400  0.83095300  0.83804500  1.0
  Ni  Ni8  1  0.00000000  0.50000000  0.50000000  1.0
  Ni  Ni9  1  0.50000000  0.50000000  0.50000000  1.0
  O  O10  1  0.25646800  0.25109700  0.47655900  1.0
  O  O11  1  0.24804900  0.73678900  0.52921300  1.0
  O  O12  1  0.75195100  0.26321100  0.47078700  1.0
  O  O13  1  0.74353200  0.74890300  0.52344100  1.0
  O  O14  1  0.89577100  0.94142300  0.14662100  1.0
  O  O15  1  0.91448600  0.39777200  0.19164000  1.0
  O  O16  1  0.42689000  0.94241900  0.14993800  1.0
  O  O17  1  0.43851000  0.38698900  0.16729600  1.0
  O  O18  1  0.10422900  0.05857700  0.85337900  1.0
  O  O19  1  0.57311000  0.05758100  0.85006200  1.0
  O  O20  1  0.08551400  0.60222800  0.80836000  1.0
  O  O21  1  0.56149000  0.61301100  0.83270400  1.0
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