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Ag2IOF

High-Entropy Materials HEA

MP-ID: mp-1079461 · Space group: P2_1 (#4)

Basic Information

Formula
Ag2IOF
MP-ID
mp-1079461
Elements
4
Sites
10
Density
5.5513
g/cm³
Volume
225.92
ų
Cell a
7.9098
Å
Cell b
4.6390
Å
Cell c
6.1614
Å
α Angle
87.82
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P2_1
Point Group
2
Crystal System
Monoclinic
Bravais Lattice
Monoclinic 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
14.39 6.1570 51.8 (0,0,1)
18.26 4.8586 5.9 (1,0,1)
19.15 4.6357 65.9 (0,1,0)
22.23 3.9994 26.6 (1,1,0)
22.48 3.9549 15.9 (2,0,0)
23.58 3.7731 3.9 (0,1,1)
26.17 3.4055 16.6 (1,1,1)
26.79 3.3276 30.6 (2,0,1)
26.98 3.3047 66.8 (1,1,-1)
29.01 3.0785 3.0 (0,0,2)
29.69 3.0087 100.0 (2,1,0)
32.81 2.7300 3.6 (2,1,1)
33.47 2.6772 8.7 (2,1,-1)
34.35 2.6108 48.3 (0,1,2)
35.62 2.5206 29.2 (0,1,-2)
36.23 2.4792 7.0 (1,1,2)
37.00 2.4293 84.4 (2,0,2)
37.09 2.4237 14.9 (3,0,1)
37.45 2.4016 11.5 (1,1,-2)
38.85 2.3178 3.5 (0,2,0)
39.31 2.2918 20.3 (3,1,0)
40.56 2.2243 6.2 (1,2,0)
41.08 2.1970 2.4 (0,2,1)
41.44 2.1788 13.8 (2,1,2)
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Energy Properties

Formation Energy/atom
-0.20996
eV/atom
Energy/atom
-3.02445
eV/atom
Energy above Hull
0.6434
eV/atom
Uncorrected Energy
-2.7947
eV/atom
Volume/atom
22.59
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
1.7277
μB
Mag. Ordering
FM
Mag. Sites
2
Magnetization/Volume
0.007650
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ag · 0.400
Element Family
4d-TM
Solute Fraction
0.600
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.3322
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
11.0757
J/mol·K
Ω Parameter
0.0000
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
40.045%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.8167
smaller = more stable mixing
VEC
7.200
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
0.000
kJ/mol; negative = exothermic mixing
Entropy Norm
0.9610
SS Former
0
Phase Tendency
IM

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1079461
Reference Citation

The crystal structure and related material properties of Ag2IOF were obtained from the Materials Project database (MP-ID: mp-1079461, 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_Ag2IOF
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.90982300
_cell_length_b   4.63901700
_cell_length_c   6.16143087
_cell_angle_alpha   87.81644198
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ag2IOF
_chemical_formula_sum   'Ag4 I2 O2 F2'
_cell_volume   225.92216948
_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
  Ag  Ag0  1  0.99411100  0.01496800  0.73430500  1.0
  Ag  Ag1  1  0.49411100  0.98503200  0.26569500  1.0
  Ag  Ag2  1  0.43094600  0.02544600  0.73456500  1.0
  Ag  Ag3  1  0.93094600  0.97455400  0.26543500  1.0
  I  I4  1  0.71735100  0.31267700  0.51113600  1.0
  I  I5  1  0.21735100  0.68732300  0.48886400  1.0
  O  O6  1  0.88390900  0.74033600  0.98146100  1.0
  O  O7  1  0.38390900  0.25966400  0.01853900  1.0
  F  F8  1  0.55882300  0.70604500  0.99185200  1.0
  F  F9  1  0.05882300  0.29395500  0.00814800  1.0
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