material

GeF2
ID:

mp-1095292
Tags: Germanium difluoride

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
NM
Formation Energy / Atom
-2.394 eV

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

Energy Above Hull / Atom
0.017 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
3.57 g/cm3

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

Decomposes To
GeF2
Band Gap
4.197 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
Pnma [62]
Hall
-P 2ac 2n
Point Group
mmm
Crystal System
orthorhombic

Electronic Structure

Topological data for ICSD ID 424202 from Topological Materials Database
Topological Classification
trivial*
Subclassification
LCEBR†
* trivial insulator or metal
† Linear Combination of Elementary Band Representations

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%)

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.

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
AuClO2 (mp-997018) 0.6909 0.251 3
CsHC2 (mp-31476) 0.7374 0.429 3
As(CN)3 (mp-623837) 0.4837 0.500 3
P(CN)3 (mp-622020) 0.5321 0.655 3
As(CN)3 (mp-608317) 0.6733 0.585 3
AgCNO (mp-6814) 0.6618 0.726 4
Fe3C9Se2O9 (mp-629560) 0.6643 0.650 4
BiOs2(CO)6 (mp-616249) 0.4976 0.220 4
Fe3Te2(CO)9 (mp-652337) 0.6373 0.676 4
BiRu2(CO)6 (mp-652854) 0.5339 0.208 4
ICl (mp-568024) 0.7260 0.009 2
HgH2C6(NCl2)2 (mp-698360) 0.7477 1.250 5
Fe2Te2Ru2(CO)11 (mp-651724) 0.7405 0.460 5
Up to 5 similar elemental, binary, ternary, quaternary, etc. structures displayed (dissimilarity threshold 0.75). Ehull: energy above hull per atom [eV].

Calculation Summary

Structure Optimization

Run Type
GGA
Energy Cutoff
520 eV
# of K-points
None
U Values
--
Pseudopotentials
VASP PAW: Ge_d F
Final Energy/Atom
-4.8818 eV
Corrected Energy
-58.5812 eV
-58.5812 eV = -58.5812 eV (uncorrected energy)

Detailed input parameters and outputs for all calculations

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ICSD IDs
  • 424202
Submitted by
User remarks:
  • Germanium difluoride

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)