material

TaGe2
ID:

mp-7558
DOI:

10.17188/1290229

Tags: Tantalum germanide (1/2)

Material Details

Final Magnetic Moment
0.003 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
-0.226 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
10.99 g/cm3

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

Decomposes To
Stable
Band Gap
0.000 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

Electronic Structure

Topological data for ICSD ID 16504 from Topological Materials Database
Topological Classification
SM*
Subclassification
ESFD†
Crossing Type
Point
* Semimetal
† Enforced Semimetal with Fermi point Degeneracy

Band Structure and Density of States

Warning! Semi-local DFT tends to severely underestimate bandgaps. 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%)

Substrates

Reference for minimal coincident interface area (MCIA) and elastic energy:
substrate orientation:
No elastic tensor calculated for this material, so elastic energies not avaialable. Sorting by MCIA instead.
substrate material substrate orientation film orientation MCIA† [Å2]
AlN (mp-661) <1 0 0> <1 0 0> 170.5
AlN (mp-661) <1 1 0> <1 0 1> 80.9
AlN (mp-661) <1 1 1> <1 0 1> 202.2
CeO2 (mp-20194) <1 1 0> <0 0 1> 326.0
CeO2 (mp-20194) <1 1 1> <0 0 1> 152.1
GaAs (mp-2534) <1 1 0> <1 0 1> 283.1
BaF2 (mp-1029) <1 0 0> <1 1 1> 188.8
BaF2 (mp-1029) <1 1 1> <0 0 1> 65.2
GaN (mp-804) <1 1 0> <1 0 0> 306.9
SiO2 (mp-6930) <1 0 0> <1 0 1> 80.9
SiO2 (mp-6930) <1 0 1> <0 0 1> 108.7
SiO2 (mp-6930) <1 1 1> <1 1 1> 314.7
LaAlO3 (mp-2920) <0 0 1> <0 0 1> 347.7
AlN (mp-661) <0 0 1> <0 0 1> 260.8
AlN (mp-661) <1 0 1> <1 1 1> 314.7
KCl (mp-23193) <1 1 1> <0 0 1> 282.5
DyScO3 (mp-31120) <0 0 1> <1 0 0> 306.9
DyScO3 (mp-31120) <1 0 0> <1 0 1> 283.1
DyScO3 (mp-31120) <1 0 1> <1 0 1> 161.7
InAs (mp-20305) <1 0 0> <1 1 1> 188.8
ZnSe (mp-1190) <1 1 0> <1 0 1> 283.1
GaN (mp-804) <0 0 1> <1 0 0> 170.5
GaN (mp-804) <1 0 0> <1 0 0> 341.0
GaN (mp-804) <1 0 1> <0 0 1> 282.5
GaN (mp-804) <1 1 1> <0 0 1> 217.3
KTaO3 (mp-3614) <1 0 0> <1 0 0> 306.9
KTaO3 (mp-3614) <1 1 1> <0 0 1> 86.9
SiO2 (mp-6930) <0 0 1> <0 0 1> 21.7
SiO2 (mp-6930) <1 1 0> <1 1 0> 236.3
LiF (mp-1138) <1 1 1> <0 0 1> 86.9
Te2W (mp-22693) <0 1 0> <1 0 0> 102.3
YVO4 (mp-19133) <0 0 1> <0 0 1> 260.8
YVO4 (mp-19133) <1 1 0> <1 0 1> 323.5
DyScO3 (mp-31120) <0 1 1> <1 0 1> 161.7
InAs (mp-20305) <1 1 0> <0 0 1> 260.8
InAs (mp-20305) <1 1 1> <0 0 1> 65.2
Te2Mo (mp-602) <0 0 1> <0 0 1> 282.5
Te2Mo (mp-602) <1 0 1> <0 0 1> 282.5
KTaO3 (mp-3614) <1 1 0> <1 0 0> 68.2
CdS (mp-672) <0 0 1> <1 0 1> 121.3
CdS (mp-672) <1 0 0> <1 0 0> 170.5
CdS (mp-672) <1 1 0> <1 1 0> 295.3
Ag (mp-124) <1 0 0> <0 0 1> 347.7
Ag (mp-124) <1 1 0> <1 0 0> 272.8
Ag (mp-124) <1 1 1> <0 0 1> 86.9
Bi2Te3 (mp-34202) <0 0 1> <0 0 1> 65.2
LiF (mp-1138) <1 0 0> <1 1 1> 251.7
LiF (mp-1138) <1 1 0> <1 0 1> 283.1
Te2W (mp-22693) <0 0 1> <1 0 0> 170.5
GaSe (mp-1943) <0 0 1> <0 0 1> 86.9
Up to 50 entries displayed.
†minimal coincident interface area.

Elasticity

Reference for tensor and properties:
Visualize with ELATE
Stiffness Tensor Cij (GPa)
266 72 68 0 0 0
72 266 68 0 0 0
68 68 364 0 0 0
0 0 0 95 0 0
0 0 0 0 95 0
0 0 0 0 0 97
Compliance Tensor Sij (10-12Pa-1)
4.2 -1 -0.6 0 0 0
-1 4.2 -0.6 0 0 0
-0.6 -0.6 3 0 0 0
0 0 0 10.5 0 0
0 0 0 0 10.5 0
0 0 0 0 0 10.3
Shear Modulus GV
103 GPa
Bulk Modulus KV
146 GPa
Shear Modulus GR
101 GPa
Bulk Modulus KR
143 GPa
Shear Modulus GVRH
102 GPa
Bulk Modulus KVRH
144 GPa
Elastic Anisotropy
0.11
Poisson's Ratio
0.21

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
LaSb2Au (mp-675224) 0.4219 0.286 3
LiFeAs (mp-1008927) 0.6897 0.296 3
NbGe2 (mp-363) 0.0229 0.000 2
Ga2Os (mp-570875) 0.1183 0.074 2
Ga2Ru (mp-1072429) 0.1280 0.000 2
TiSi2 (mp-2582) 0.1008 0.008 2
VGe2 (mp-1084800) 0.1147 0.019 2
Sc (mp-601273) 0.3929 0.128 1
Pr (mp-568938) 0.5148 0.096 1
Pa (mp-62) 0.5157 0.027 1
Pr (mp-1056311) 0.4443 0.096 1
Sn (mp-55) 0.4245 0.047 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: Ta_pv Ge_d
Final Energy/Atom
-7.2566 eV
Corrected Energy
-65.3093 eV
Uncorrected energy = -65.3093 eV Corrected energy = -65.3093 eV

Detailed input parameters and outputs for all calculations

Show JSON History Show BibTex Citation Download BibTex Citation
ICSD IDs
  • 637963
  • 16504
  • 637957
Submitted by
User remarks:
  • Tantalum germanide (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)