LiCuPO4

High-Entropy Materials HEA

MP-ID: mp-773891 · Space group: Pna2_1 (#33)

Materials Project API

Basic Information

Formula

LiCuPO4

MP-ID

mp-773891

Elements

Sites

Density

3.2257

g/cm³

Volume

340.71

Å³

Cell a

4.9374

Cell b

6.9712

Cell c

9.8986

α Angle

90.00

β Angle

90.00

γ Angle

90.00

Space Group

Pna2_1

Point Group

mm2

Crystal System

Orthorhombic

Bravais Lattice

Stability

Packing Fraction

X-ray Diffraction

Diffraction Pattern

Target / Radiation

X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å

Diffraction Peaks (Top 24)

2θ	d (Å)	I	hkl
22.03	4.0356	100.0	(0,1,2)
22.06	4.0292	95.6	(1,1,0)
23.84	3.7319	8.5	(1,1,1)
25.48	3.4955	13.3	(1,0,2)
25.56	3.4856	5.4	(0,2,0)
28.57	3.1247	10.8	(1,1,2)
31.39	2.8498	21.2	(0,2,2)
32.64	2.7434	3.0	(1,0,3)
32.73	2.7365	14.5	(1,2,1)
35.15	2.5528	4.4	(1,1,3)
36.30	2.4747	31.7	(0,0,4)
36.39	2.4687	33.2	(2,0,0)
36.40	2.4682	23.1	(1,2,2)
37.55	2.3953	1.1	(2,0,1)
38.61	2.3321	4.0	(0,1,4)
39.79	2.2653	3.0	(2,1,1)
40.79	2.2123	1.3	(1,0,4)
41.91	2.1557	7.9	(1,2,3)
42.89	2.1087	14.6	(1,1,4)
42.95	2.1059	16.6	(2,1,2)
43.00	2.1034	10.6	(0,3,2)
43.02	2.1025	9.6	(1,3,0)
44.03	2.0566	3.7	(1,3,1)
44.92	2.0178	3.9	(0,2,4)

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Energy Properties

Formation Energy/atom

-2.18372

eV/atom

Energy/atom

-6.64307

eV/atom

Energy above Hull

0.0518

eV/atom

Uncorrected Energy

-6.2505

eV/atom

Volume/atom

12.17

Å³

c/a Ratio

2.0048

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

4.0056

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.011760

μB/Å³

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

0.143

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

1.1537

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

9.5922

J/mol·K

Ω Parameter

0.3193

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

40.473%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.9295

smaller = more stable mixing

VEC

4.714

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-10.077

kJ/mol; negative = exothermic mixing

Entropy Norm

0.8322

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (2)

aaabxcuz aaacypuw

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-773891

Reference Citation

The crystal structure and related material properties of LiCuPO4 were obtained from the Materials Project database (MP-ID: mp-773891, 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

3D Crystal Structure Rendering

Loading 3D structure…

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Raw CIF Data

# generated using pymatgen
data_LiCuPO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.93742800
_cell_length_b   6.97115100
_cell_length_c   9.89862400
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LiCuPO4
_chemical_formula_sum   'Li4 Cu4 P4 O16'
_cell_volume   340.70624447
_cell_formula_units_Z   4
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  0.69408600  0.28688600  0.65581200  1.0
  Li  Li1  1  0.19408600  0.78688600  0.84418800  1.0
  Li  Li2  1  0.80591400  0.28688600  0.15581200  1.0
  Li  Li3  1  0.30591400  0.78688600  0.34418800  1.0
  Cu  Cu4  1  0.70335700  0.78497100  0.64825200  1.0
  Cu  Cu5  1  0.20335700  0.28497100  0.85174800  1.0
  Cu  Cu6  1  0.79664300  0.78497100  0.14825200  1.0
  Cu  Cu7  1  0.29664300  0.28497100  0.35174800  1.0
  P  P8  1  0.18930100  0.53696500  0.59292900  1.0
  P  P9  1  0.68930100  0.03696500  0.90707100  1.0
  P  P10  1  0.31069900  0.53696500  0.09292900  1.0
  P  P11  1  0.81069900  0.03696500  0.40707100  1.0
  O  O12  1  0.74364800  0.03462700  0.56041000  1.0
  O  O13  1  0.87786700  0.53498000  0.61736100  1.0
  O  O14  1  0.31068600  0.35470600  0.65966500  1.0
  O  O15  1  0.30502800  0.72489500  0.65404000  1.0
  O  O16  1  0.80502800  0.22489500  0.84596000  1.0
  O  O17  1  0.81068600  0.85470600  0.84033500  1.0
  O  O18  1  0.37786700  0.03498000  0.88263900  1.0
  O  O19  1  0.24364800  0.53462700  0.93959000  1.0
  O  O20  1  0.75635200  0.03462700  0.06041000  1.0
  O  O21  1  0.62213300  0.53498000  0.11736100  1.0
  O  O22  1  0.18931400  0.35470600  0.15966500  1.0
  O  O23  1  0.19497200  0.72489500  0.15404000  1.0
  O  O24  1  0.69497200  0.22489500  0.34596000  1.0
  O  O25  1  0.68931400  0.85470600  0.34033500  1.0
  O  O26  1  0.12213300  0.03498000  0.38263900  1.0
  O  O27  1  0.25635200  0.53462700  0.43959000  1.0

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