material

TaSi2
ID:

mp-517
DOI:

10.17188/1263123

Tags: High pressure experimental phase Tantalum silicide (1/2)

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
Non-magnetic
Formation Energy / Atom
-0.478 eV

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

Energy Above Hull / Atom
< 0.001 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
8.94 g/cm3

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

Decomposes To
TaSi2
Band Gap
0.000 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
P6222 [180]
Hall
P 62 2c (0 0 1)
Point Group
622
Crystal System
hexagonal

Band Structure

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

sign indicates spin ↑ ↓

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]
Al2O3 (mp-1143) <0 0 1> <0 0 1> 0.000 20.0
LiF (mp-1138) <1 1 1> <0 0 1> 0.000 260.0
NdGaO3 (mp-3196) <1 0 0> <1 0 1> 0.004 262.6
ZnO (mp-2133) <1 0 1> <1 0 0> 0.034 158.7
SiO2 (mp-6930) <1 0 1> <1 1 1> 0.041 175.5
SiO2 (mp-6930) <0 0 1> <0 0 1> 0.050 260.0
CdTe (mp-406) <1 0 0> <1 1 0> 0.051 219.9
InSb (mp-20012) <1 0 0> <1 1 0> 0.053 219.9
GaN (mp-804) <0 0 1> <0 0 1> 0.059 80.0
SrTiO3 (mp-4651) <1 0 1> <0 0 1> 0.094 160.0
Al2O3 (mp-1143) <1 0 0> <1 0 0> 0.100 63.5
Al2O3 (mp-1143) <1 1 0> <1 1 0> 0.100 109.9
Au (mp-81) <1 0 0> <0 0 1> 0.102 140.0
AlN (mp-661) <0 0 1> <0 0 1> 0.127 60.0
ZnO (mp-2133) <0 0 1> <0 0 1> 0.127 180.0
GaN (mp-804) <1 0 0> <1 0 1> 0.135 150.1
MoSe2 (mp-1634) <0 0 1> <0 0 1> 0.137 180.0
WSe2 (mp-1821) <0 0 1> <0 0 1> 0.138 180.0
MgF2 (mp-1249) <1 1 0> <1 1 0> 0.144 164.9
Mg (mp-153) <1 0 0> <1 0 1> 0.166 150.1
WSe2 (mp-1821) <1 1 1> <0 0 1> 0.166 260.0
TiO2 (mp-2657) <1 0 1> <1 1 1> 0.178 234.0
SiC (mp-11714) <1 0 0> <1 0 1> 0.181 187.6
LiGaO2 (mp-5854) <1 1 1> <1 0 0> 0.186 222.2
Ag (mp-124) <1 0 0> <0 0 1> 0.188 140.0
C (mp-48) <1 1 1> <1 1 1> 0.196 234.0
Bi2Se3 (mp-541837) <0 0 1> <0 0 1> 0.200 60.0
GaTe (mp-542812) <0 0 1> <0 0 1> 0.203 300.1
WS2 (mp-224) <1 1 0> <1 1 1> 0.215 234.0
InP (mp-20351) <1 0 0> <1 1 1> 0.233 175.5
LiGaO2 (mp-5854) <1 0 1> <1 0 1> 0.248 225.1
Ni (mp-23) <1 0 0> <0 0 1> 0.251 220.0
BN (mp-984) <1 0 1> <1 0 0> 0.263 222.2
BaTiO3 (mp-5986) <1 0 0> <0 0 1> 0.269 100.0
Ni (mp-23) <1 1 1> <0 0 1> 0.271 260.0
CdS (mp-672) <1 0 0> <0 0 1> 0.272 340.1
Bi2Te3 (mp-34202) <0 0 1> <1 0 0> 0.274 222.2
C (mp-48) <0 0 1> <0 0 1> 0.276 140.0
NdGaO3 (mp-3196) <1 0 1> <0 0 1> 0.282 160.0
LaF3 (mp-905) <1 1 0> <0 0 1> 0.284 280.0
NaCl (mp-22862) <1 0 0> <0 0 1> 0.301 360.1
NdGaO3 (mp-3196) <0 1 1> <0 0 1> 0.321 160.0
SrTiO3 (mp-4651) <1 0 0> <1 0 1> 0.326 262.6
InAs (mp-20305) <1 1 1> <0 0 1> 0.327 260.0
ZnTe (mp-2176) <1 1 1> <0 0 1> 0.368 260.0
Te2W (mp-22693) <0 0 1> <1 1 1> 0.374 175.5
CaCO3 (mp-3953) <0 0 1> <0 0 1> 0.409 260.0
Ge(Bi3O5)4 (mp-23352) <1 1 1> <0 0 1> 0.416 180.0
TiO2 (mp-2657) <1 0 0> <1 0 1> 0.426 150.1
AlN (mp-661) <1 0 0> <1 0 1> 0.445 187.6
Up to 50 entries displayed.
†minimal coincident interface area.

Elasticity

Reference for tensor and properties:
Visualize with ELATE
Stiffness Tensor Cij (GPa)
359 81 87 0 0 0
81 359 87 0 0 0
87 87 455 0 0 0
0 0 0 135 0 0
0 0 0 0 135 0
0 0 0 0 0 139
Compliance Tensor Sij (10-12Pa-1)
3 -0.6 -0.5 0 0 0
-0.6 3 -0.5 0 0 0
-0.5 -0.5 2.4 0 0 0
0 0 0 7.4 0 0
0 0 0 0 7.4 0
0 0 0 0 0 7.2
Shear Modulus GV
143 GPa
Bulk Modulus KV
187 GPa
Shear Modulus GR
142 GPa
Bulk Modulus KR
184 GPa
Shear Modulus GVRH
142 GPa
Bulk Modulus KVRH
186 GPa
Elastic Anisotropy
0.06
Poisson's Ratio
0.19

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
LaSb2Au (mp-675224) 0.5060 0.264 3
LiFeAs (mp-1008927) 0.6535 0.293 3
NbSi2 (mp-12104) 0.0052 0.000 2
VSi2 (mp-10711) 0.1850 0.000 2
VSi2 (mp-11190) 0.1850 0.000 2
TaSi2 (mp-11192) 0.0032 0.000 2
NbSi2 (mp-2478) 0.0061 0.000 2
Hg (mp-569289) 0.5495 0.008 1
Sc (mp-601273) 0.4635 0.130 1
Pr (mp-568938) 0.5148 0.099 1
Pr (mp-1056311) 0.4642 0.104 1
Sn (mp-55) 0.4598 0.055 1
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: Si Ta_pv
Final Energy/Atom
-8.0468 eV
Corrected Energy
-72.4213 eV
-72.4213 eV = -72.4213 eV (uncorrected energy)

Detailed input parameters and outputs for all calculations

Show JSON History Show BibTex Citation Download BibTex Citation
ICSD IDs
  • 652333
  • 652301
  • 151192
  • 652325
  • 652311
  • 603163
  • 652332
  • 652316
  • 43596
  • 652307
Submitted by
User remarks:
  • High pressure experimental phase
  • Tantalum silicide (1/2)

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)