material

Ba3Ta2MnO9

ID:

mp-1214505


Tags: Ba3Ta2MnO9 Ba3SrTa2O9

Material Details

Final Magnetic Moment
0.000 μB

Calculated total magnetic moment for the unit cell within the magnetic ordering provided (see below). Typically accurate to the second digit.

Magnetic Ordering
AFM
Formation Energy / Atom
-3.285 eV

Calculated formation energy from the elements normalized to per atom in the unit cell.

Energy Above Hull / Atom
0.000 eV

The energy of decomposition of this material into the set of most stable materials at this chemical composition, in eV/atom. Stability is tested against all potential chemical combinations that result in the material's composition. For example, a Co2O3 structure would be tested for decomposition against other Co2O3 structures, against Co and O2 mixtures, and against CoO and O2 mixtures.

Density
7.43 g/cm3

The calculated bulk crystalline density, typically underestimated due calculated cell volumes overestimated on average by 3% (+/- 6%)

Decomposes To
Stable
Band Gap
2.376 eV

In general, band gaps computed with common exchange-correlation functionals such as the LDA and GGA are severely underestimated. Typically the disagreement is reported to be ~50% in the literature. Some internal testing by the Materials Project supports these statements; typically, we find that band gaps are underestimated by ~40%. We additionally find that several known insulators are predicted to be metallic.

Space Group

Hermann Mauguin
P3m1 [164]
Hall
-P 3 2"
Point Group
1
Crystal System
trigonal
We have not yet calculated a detailed bandstructure for this material

X-Ray Diffraction

    Select radiation source:
  • Cu
  • Ag
  • Mo
  • Fe

Calculated powder diffraction pattern; note that peak spacings may be affected due to inaccuracies in calculated cell volume, which is typically overestimated on average by 3% (+/- 6%)

Elasticity

A full elastic tensor has not been calculated for this material. Registered users can view statistical-learning-based predictions of this material's bulk and shear moduli.

Once you have registered you can also "vote" for full calculation of this material's elastic properties.

Dielectric Properties

Reference for tensor and properties: Methodology
Dielectric Tensor εij (electronic contribution)
4.80 -0.00 0.00
-0.00 4.80 -0.00
0.00 -0.00 4.69
Dielectric Tensor εij (total)
46.07 -0.00 0.00
-0.00 46.07 -0.00
0.00 -0.00 31.55
Polycrystalline dielectric constant εpoly
(electronic contribution)
4.76
Polycrystalline dielectric constant εpoly
(total)
41.23
Refractive Index n
2.18
Potentially ferroelectric?
Unknown

Calculation Summary

Structure Optimization

Run Type
GGA+U
Energy Cutoff
700 eV
# of K-points
None
U Values
Mn: 3.9 eV
Pseudopotentials
VASP PAW: Ba_sv Ta_pv Mn_pv O
Final Energy/Atom
-8.2957 eV
Corrected Energy
-529.7474 eV
-529.7474 eV = -497.7415 eV (uncorrected energy) - 25.2824 eV (MP Anion Correction) - 6.7234 eV (MP Advanced Correction)

Detailed input parameters and outputs for all calculations


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User remarks:
  • Ba3Ta2MnO9
  • Ba3SrTa2O9
  • sample prepared from BaO, MnO, Ta2O5, powder (determination of cell parameters)

Displaying lattice parameters for primitive cell; note that calculated cell volumes are typically overestimated on average by 3% (+/- 6%). Note the primitive cell may appear less symmetric than the conventional cell representation (see "Structure Type" selector below the 3d structure)