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Ba(IrO3)2

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-674187 · Space group: R3 (#146)

Basic Information

Formula
Ba(IrO3)2
MP-ID
mp-674187
Elements
3
Sites
27
Density
7.2764
g/cm³
Volume
422.93
ų
Cell a
8.2011
Å
Cell b
8.2011
Å
Cell c
8.2011
Å
α Angle
109.58
°
β Angle
109.58
°
γ Angle
109.58
°
Space Group
R3
Point Group
3
Crystal System
Trigonal
Bravais Lattice
Trigonal R
Stability
Yes
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
13.21 6.7006 100.0 (1,0,-1)
13.27 6.6740 36.4 (1,0,0)
18.77 4.7286 33.3 (1,1,-1)
22.99 3.8686 14.3 (2,-1,-1)
23.02 3.8635 22.7 (2,0,-1)
23.11 3.8482 7.2 (1,1,0)
26.61 3.3503 1.1 (2,0,-2)
26.71 3.3370 8.1 (2,0,0)
29.84 2.9942 70.2 (2,1,-2)
29.91 2.9871 87.5 (2,1,-1)
32.76 2.7337 13.1 (3,-1,-1)
32.94 2.7193 8.8 (1,1,1)
35.44 2.5326 10.5 (3,-1,-2)
35.44 2.5326 20.9 (2,1,-3)
35.47 2.5311 36.7 (3,0,-2)
35.53 2.5268 18.6 (3,0,-1)
35.53 2.5268 9.3 (1,-3,0)
35.63 2.5197 24.9 (2,1,0)
38.06 2.3643 10.1 (2,2,-2)
40.38 2.2335 1.3 (3,0,-3)
40.40 2.2325 4.8 (3,-2,-2)
40.46 2.2296 9.1 (3,1,-2)
40.55 2.2247 5.8 (2,2,-1)
42.83 2.1114 1.9 (3,1,-1)
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Energy Properties

Formation Energy/atom
-1.70874
eV/atom
Energy/atom
-7.18469
eV/atom
Energy above Hull
0.0000
eV/atom
Uncorrected Energy
-19.8946
eV/atom
Volume/atom
15.66
ų
c/a Ratio
1.0000

Electronic Properties

Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0000
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
O · 0.667
Element Family
Metalloid-Nonmetal
Solute Fraction
0.333
Interstitial Fraction
0.000

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
0.8487
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
7.0560
J/mol·K
Ω Parameter
0.0000
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
56.120%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
0.8671
smaller = more stable mixing
VEC
4.889
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
0.000
kJ/mol; negative = exothermic mixing
Entropy Norm
0.7725
SS Former
0
Phase Tendency
IM

Traditional Material Features

ROM Blended-Feature Radar
Rating & Classification
Tier
A
Score
0.605
Family
O-rich Multi-Component
Matrix Element
O · 0.667

Related Tasks

Related computation task IDs (2)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-674187
Reference Citation

The crystal structure and related material properties of Ba(IrO3)2 were obtained from the Materials Project database (MP-ID: mp-674187, 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_Ba(IrO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.20110184
_cell_length_b   8.20110159
_cell_length_c   8.20110173
_cell_angle_alpha   109.57777626
_cell_angle_beta   109.57777736
_cell_angle_gamma   109.57777859
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ba(IrO3)2
_chemical_formula_sum   'Ba3 Ir6 O18'
_cell_volume   422.93092172
_cell_formula_units_Z   3
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
  Ba  Ba0  1  0.36210193  0.99702007  0.99404109  1.0
  Ba  Ba1  1  0.99702007  0.99404109  0.36210193  1.0
  Ba  Ba2  1  0.99404109  0.36210193  0.99702007  1.0
  Ir  Ir3  1  0.50140540  0.34550645  0.83828791  1.0
  Ir  Ir4  1  0.83828791  0.50140540  0.34550645  1.0
  Ir  Ir5  1  0.34550645  0.83828791  0.50140540  1.0
  Ir  Ir6  1  0.65561793  0.16190113  0.50105829  1.0
  Ir  Ir7  1  0.16190113  0.50105829  0.65561793  1.0
  Ir  Ir8  1  0.50105829  0.65561793  0.16190113  1.0
  O  O9  1  0.64195591  0.63938573  0.00996280  1.0
  O  O10  1  0.71747130  0.66754059  0.36439053  1.0
  O  O11  1  0.66754059  0.36439053  0.71747130  1.0
  O  O12  1  0.68459680  0.32850953  0.04893599  1.0
  O  O13  1  0.32850953  0.04893599  0.68459680  1.0
  O  O14  1  0.64276387  0.30199161  0.35407299  1.0
  O  O15  1  0.04893599  0.68459680  0.32850953  1.0
  O  O16  1  0.99735976  0.35907022  0.35650509  1.0
  O  O17  1  0.35650509  0.99735976  0.35907022  1.0
  O  O18  1  0.00996280  0.64195591  0.63938573  1.0
  O  O19  1  0.94951452  0.28384386  0.63988070  1.0
  O  O20  1  0.36439053  0.71747130  0.66754059  1.0
  O  O21  1  0.63988070  0.94951452  0.28384386  1.0
  O  O22  1  0.28384386  0.63988070  0.94951452  1.0
  O  O23  1  0.63938573  0.00996280  0.64195591  1.0
  O  O24  1  0.35407299  0.64276387  0.30199161  1.0
  O  O25  1  0.30199161  0.35407299  0.64276387  1.0
  O  O26  1  0.35907022  0.35650509  0.99735976  1.0
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