BaMnO3

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1016852 · Space group: Pm-3m (#221)

Materials Project API

Basic Information

Formula

BaMnO3

MP-ID

mp-1016852

Elements

Sites

Density

6.0807

g/cm³

Volume

65.61

Å³

Cell a

4.0333

Cell b

4.0333

Cell c

4.0333

α Angle

90.00

β Angle

90.00

γ Angle

90.00

Space Group

Pm-3m

Point Group

m-3m

Crystal System

Cubic

Bravais Lattice

Stability

Packing Fraction

0.5236

X-ray Diffraction

Diffraction Pattern

Target / Radiation

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

Diffraction Peaks (Top 12)

2θ	d (Å)	I	hkl
22.04	4.0333	12.9	(1,0,0)
31.37	2.8520	100.0	(1,1,0)
38.67	2.3286	19.8	(1,1,1)
44.95	2.0167	33.8	(2,0,0)
50.61	1.8038	6.9	(2,1,0)
55.83	1.6466	38.4	(2,1,1)
65.45	1.4260	20.1	(2,2,0)
69.98	1.3444	3.9	(2,2,1)
74.38	1.2755	16.6	(3,1,0)
78.68	1.2161	6.5	(3,1,1)
82.92	1.1643	6.7	(2,2,2)
87.13	1.1186	2.0	(3,2,0)

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Energy Properties

Formation Energy/atom

-2.35621

eV/atom

Energy/atom

-7.54118

eV/atom

Energy above Hull

0.1337

eV/atom

Uncorrected Energy

-6.7954

eV/atom

Volume/atom

13.12

Å³

c/a Ratio

1.0000

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

3.0024

μB

Mag. Ordering

FiM

Mag. Sites

Magnetization/Volume

0.045760

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

O · 0.600

Element Family

Metalloid-Nonmetal

Solute Fraction

0.400

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.9503

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

7.9005

J/mol·K

Ω Parameter

0.0000

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

58.511%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

1.1074

smaller = more stable mixing

VEC

4.200

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

0.000

kJ/mol; negative = exothermic mixing

Entropy Norm

0.8650

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.445

Family

O-rich Multi-Component

Matrix Element

O · 0.600

Related Tasks

Related computation task IDs (5)

aaadnuiq aaadwfgk aaadxzwz aaaetdpt aaafxeve

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1016852

Reference Citation

The crystal structure and related material properties of BaMnO3 were obtained from the Materials Project database (MP-ID: mp-1016852, 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

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Raw CIF Data

# generated using pymatgen
data_BaMnO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.03331300
_cell_length_b   4.03331300
_cell_length_c   4.03331300
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaMnO3
_chemical_formula_sum   'Ba1 Mn1 O3'
_cell_volume   65.61237804
_cell_formula_units_Z   1
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  0.50000000  0.50000000  0.50000000  1.0
  Mn  Mn1  1  0.00000000  0.00000000  0.00000000  1.0
  O  O2  1  0.50000000  0.00000000  0.00000000  1.0
  O  O3  1  0.00000000  0.50000000  0.00000000  1.0
  O  O4  1  0.00000000  0.00000000  0.50000000  1.0

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