material

Al21Pt8
ID:

mp-1982
DOI:

10.17188/1195017

Tags: High pressure experimental phase Aluminium platinum (21/8)

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
FM
Formation Energy / Atom
-0.760 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
7.71 g/cm3

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

Decomposes To
Stable
Band Gap
0.021 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
I41/a [88]
Hall
I 4bw 1bw
Point Group
4/m
Crystal System
tetragonal
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%)

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]
Cu (mp-30) <1 0 0> <0 0 1> 0.002 170.3
SiC (mp-11714) <0 0 1> <1 1 0> 0.035 198.7
SiC (mp-7631) <0 0 1> <1 1 0> 0.037 198.7
SiC (mp-8062) <1 1 1> <1 1 0> 0.044 198.7
TePb (mp-19717) <1 0 0> <0 0 1> 0.135 170.3
ZnO (mp-2133) <1 0 0> <1 0 0> 0.165 140.5
YAlO3 (mp-3792) <1 0 1> <1 1 0> 0.184 198.7
LaAlO3 (mp-2920) <1 0 0> <1 0 0> 0.209 140.5
LiGaO2 (mp-5854) <1 0 0> <1 0 0> 0.215 140.5
KP(HO2)2 (mp-23959) <1 0 1> <1 0 0> 0.397 140.5
KP(HO2)2 (mp-23959) <1 1 0> <1 0 0> 0.410 140.5
Mg (mp-153) <0 0 1> <1 0 0> 0.712 140.5
MoS2 (mp-1434) <0 0 1> <1 0 0> 0.722 140.5
WS2 (mp-224) <0 0 1> <1 0 0> 0.722 140.5
LiAlO2 (mp-3427) <1 0 0> <1 1 0> 0.966 198.7
Up to 50 entries displayed.
†minimal coincident interface area.

Elasticity

Reference for tensor and properties:
Visualize with ELATE
Stiffness Tensor Cij (GPa)
195 88 88 0 0 0
88 228 98 3 0 0
88 98 228 -3 0 0
0 3 -3 60 0 0
0 0 0 0 64 0
0 0 0 0 0 64
Compliance Tensor Sij (10-12Pa-1)
6.8 -1.8 -1.8 0 0 0
-1.8 5.9 -1.8 -0.4 0 0
-1.8 -1.8 5.9 0.4 0 0
0 -0.4 0.4 16.8 0 0
0 0 0 0 15.7 0
0 0 0 0 0 15.7
Shear Modulus GV
63 GPa
Bulk Modulus KV
133 GPa
Shear Modulus GR
62 GPa
Bulk Modulus KR
132 GPa
Shear Modulus GVRH
62 GPa
Bulk Modulus KVRH
133 GPa
Elastic Anisotropy
0.03
Poisson's Ratio
0.30

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
Hf3(MnGa3)2 (mp-637052) 0.6729 0.000 3
Zn36Ga5Ni8 (mp-30707) 0.6817 0.004 3
Al17(SiPd2)4 (mp-18663) 0.2541 0.078 3
Fe2CuGe2 (mp-21141) 0.7193 0.020 3
Al3Fe2Si3 (mp-29066) 0.6390 0.000 3
Al13Os4 (mp-567929) 0.4934 0.000 2
Ge8Pd21 (mp-582201) 0.5854 0.000 2
Al21Pd8 (mp-1498) 0.0783 0.000 2
Sm10Pd21 (mp-662804) 0.6862 0.000 2
Sm10Pd21 (mp-648832) 0.6874 0.000 2
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
None
U Values
--
Pseudopotentials
VASP PAW: Al Pt
Final Energy/Atom
-5.1447 eV
Corrected Energy
-298.3920 eV
-298.3920 eV = -298.3920 eV (uncorrected energy)

Detailed input parameters and outputs for all calculations

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ICSD IDs
  • 58136
  • 58137
Submitted by
User remarks:
  • High pressure experimental phase
  • Aluminium platinum (21/8)

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)