material

K2PdBr4

ID:

mp-27138

DOI:

10.17188/1201321


Tags: Dipotassium tetrabromopalladate

Material Details

Final Magnetic Moment
0.001 μB

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

Magnetic Ordering
NM
Formation Energy / Atom
-1.186 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
3.31 g/cm3

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

Decomposes To
Stable
Band Gap
1.205 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
P4/mmm [123]
Hall
-P 4 2
Point Group
4/mmm
Crystal System
tetragonal

Band Structure

Density of States
Warning! Semi-local DFT tends to severely underestimate bandgaps. Please see the wiki for more info.

sign indicates spin ↑ ↓

Vibrational Properties

Reference for phonon calculations and visualization: Visualize with phononwebsite

Phonon dispersion

Density of States
Warning! These calculations were performed using a PBEsol exchange correlation functional in the framework of DFPT using the Abinit code. Please see the wiki for more info.

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%)

X-Ray Absorption Spectra

FEFF XANES

Select an element to display a spectrum averaged over all sites of that element in the structure.

Apply Gaussian smoothing:

0 eV
3 eV
FWHM: 0 eV

Download spectra for every symmetrically equivalent absorption site in the structure.

Download FEFF Input parameters.

Warning: These results are intended to be semi-quantitative in that corrections, such as edge shifts and Debye-Waller damping, have not been included.

Substrates

Reference for minimal coincident interface area (MCIA) and elastic energy:
substrate orientation:
substrate material substrate orientation film orientation elastic energy [meV] MCIA [Å2]
Ge3(BiO3)4 (mp-23560) <1 0 0> <0 0 1> 0.000 113.7
KP(HO2)2 (mp-23959) <0 0 1> <0 0 1> 0.000 227.4
InP (mp-20351) <1 0 0> <0 0 1> 0.000 284.3
Au (mp-81) <1 0 0> <0 0 1> 0.004 227.4
Te2Mo (mp-602) <1 0 1> <1 1 0> 0.005 332.3
GaN (mp-804) <0 0 1> <1 1 0> 0.007 332.3
BN (mp-984) <0 0 1> <1 0 1> 0.008 66.0
KP(HO2)2 (mp-23959) <1 0 0> <0 0 1> 0.008 113.7
Mg (mp-153) <0 0 1> <1 1 0> 0.009 237.4
KP(HO2)2 (mp-23959) <0 1 0> <0 0 1> 0.010 227.4
BaTiO3 (mp-5986) <1 1 0> <0 0 1> 0.011 284.3
MoS2 (mp-1434) <0 0 1> <1 1 0> 0.011 237.4
WS2 (mp-224) <0 0 1> <1 1 0> 0.011 237.4
WSe2 (mp-1821) <1 1 1> <1 0 1> 0.013 264.1
TiO2 (mp-2657) <0 0 1> <0 0 1> 0.016 284.3
Ag (mp-124) <1 0 0> <0 0 1> 0.016 227.4
SiO2 (mp-6930) <0 0 1> <1 1 0> 0.017 284.8
C (mp-66) <1 0 0> <0 0 1> 0.018 113.7
SiC (mp-11714) <1 1 1> <1 1 1> 0.021 222.2
CaCO3 (mp-3953) <0 0 1> <1 1 0> 0.024 284.8
ZrO2 (mp-2858) <1 1 0> <1 1 0> 0.025 237.4
Te2Mo (mp-602) <0 0 1> <1 1 0> 0.026 332.3
C (mp-66) <1 1 1> <1 1 0> 0.027 284.8
BaTiO3 (mp-5986) <0 0 1> <0 0 1> 0.028 284.3
PbS (mp-21276) <1 0 0> <0 0 1> 0.029 284.3
MgF2 (mp-1249) <1 0 0> <1 0 0> 0.033 235.0
TiO2 (mp-390) <1 0 1> <1 0 0> 0.034 235.0
Al2O3 (mp-1143) <0 0 1> <1 0 1> 0.034 264.1
WSe2 (mp-1821) <1 1 0> <1 0 1> 0.036 264.1
WSe2 (mp-1821) <0 0 1> <1 1 1> 0.036 222.2
MoSe2 (mp-1634) <0 0 1> <1 1 1> 0.036 222.2
C (mp-48) <0 0 1> <0 0 1> 0.039 227.4
C (mp-48) <1 0 1> <1 0 0> 0.040 335.7
GaN (mp-804) <1 0 0> <0 0 1> 0.041 170.6
YAlO3 (mp-3792) <1 1 0> <0 0 1> 0.043 56.9
YAlO3 (mp-3792) <0 1 0> <1 0 1> 0.044 198.1
Ni (mp-23) <1 1 0> <1 0 1> 0.044 264.1
LiGaO2 (mp-5854) <0 0 1> <1 0 1> 0.046 198.1
CaCO3 (mp-3953) <1 0 0> <1 0 1> 0.047 264.1
LiF (mp-1138) <1 0 0> <1 1 0> 0.049 237.4
SrTiO3 (mp-4651) <0 0 1> <0 0 1> 0.050 284.3
TiO2 (mp-390) <0 0 1> <0 0 1> 0.053 56.9
MoSe2 (mp-1634) <1 1 1> <1 0 0> 0.053 268.5
GaSe (mp-1943) <0 0 1> <1 0 0> 0.053 100.7
C (mp-48) <1 1 0> <1 1 1> 0.055 296.3
LiF (mp-1138) <1 1 1> <1 0 0> 0.055 201.4
KCl (mp-23193) <1 1 0> <1 1 0> 0.055 284.8
KCl (mp-23193) <1 0 0> <1 0 0> 0.055 201.4
MgO (mp-1265) <1 0 0> <0 0 1> 0.056 284.3
ZrO2 (mp-2858) <1 0 1> <0 0 1> 0.057 170.6
Up to 50 entries displayed.
minimal coincident interface area.

Elasticity

Reference for tensor and properties:
Stiffness Tensor Cij (GPa)
19 3 3 0 0 0
3 23 2 0 0 0
3 2 23 0 0 0
0 0 0 4 0 0
0 0 0 0 4 0
0 0 0 0 0 4
Compliance Tensor Sij (10-12Pa-1)
53.9 -7.3 -7.3 0 0 0
-7.3 44 -3 0 0 0
-7.3 -3 44 0 0 0
0 0 0 273.2 0 0
0 0 0 0 229.9 0
0 0 0 0 0 229.9
Shear Modulus GV
6 GPa
Bulk Modulus KV
9 GPa
Shear Modulus GR
5 GPa
Bulk Modulus KR
9 GPa
Shear Modulus GVRH
6 GPa
Bulk Modulus KVRH
9 GPa
Elastic Anisotropy
0.95
Poisson's Ratio
0.24

Dielectric Properties

Reference for tensor and properties: Methodology
Dielectric Tensor εij (electronic contribution)
2.89 0.00 0.00
0.00 4.23 0.00
0.00 0.00 4.23
Dielectric Tensor εij (total)
2.89 0.00 0.00
0.00 25.10 0.00
0.00 0.00 25.10
Polycrystalline dielectric constant εpoly
(electronic contribution)
3.78
Polycrystalline dielectric constant εpoly
(total)
17.69
Refractive Index n
1.95
Potentially ferroelectric?
Unknown

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
K2PtCl4 (mp-22934) 0.0745 0.000 3
K2PtBr4 (mp-27243) 0.0533 0.006 3
Tl2PdCl4 (mp-29889) 0.1233 0.000 3
Rb2PdCl4 (mp-1025201) 0.2311 0.000 3
K2PdCl4 (mp-22956) 0.0396 0.000 3
Up to 5 similar elemental, binary, ternary, quaternary, etc. structures displayed (dissimilarity threshold 0.75). Ehull: energy above hull per atom [eV].

Calculation Summary

Elasticity

Methodology

Structure Optimization

Run Type
GGA
Energy Cutoff
520 eV
# of K-points
24
U Values
--
Pseudopotentials
VASP PAW: K_sv Br Pd
Final Energy/Atom
-3.1749 eV
Corrected Energy
-22.2243 eV
-22.2243 eV = -22.2243 eV (uncorrected energy)

Detailed input parameters and outputs for all calculations


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ICSD IDs
  • 1982
Submitted by
User remarks:
  • Dipotassium tetrabromopalladate

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)