material

SiO2
ID:

mp-8059
DOI:

10.17188/1281934

Tags: Cristobalite beta high Cristobalite beta Silicon oxide Cristobalite high

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
-3.280 eV

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

Energy Above Hull / Atom
0.005 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
2.10 g/cm3

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

Decomposes To
SiO2
Band Gap
5.589 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
P213 [198]
Hall
P 2ac 2ab 3
Point Group
23
Crystal System
cubic

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:
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) <0 0 1> <1 1 0> 296.5
AlN (mp-661) <1 0 0> <1 0 0> 157.2
AlN (mp-661) <1 1 0> <1 1 0> 222.4
AlN (mp-661) <1 1 1> <1 1 0> 222.4
CeO2 (mp-20194) <1 0 0> <1 0 0> 262.1
GaAs (mp-2534) <1 0 0> <1 0 0> 262.1
GaAs (mp-2534) <1 1 0> <1 1 0> 148.3
GaAs (mp-2534) <1 1 1> <1 1 0> 296.5
BaF2 (mp-1029) <1 0 0> <1 0 0> 209.7
BaF2 (mp-1029) <1 1 0> <1 1 0> 222.4
BaF2 (mp-1029) <1 1 1> <1 1 1> 272.4
GaN (mp-804) <0 0 1> <1 0 0> 314.5
GaN (mp-804) <1 0 0> <1 0 0> 262.1
SiO2 (mp-6930) <0 0 1> <1 0 0> 262.1
SiO2 (mp-6930) <1 0 0> <1 1 0> 222.4
KCl (mp-23193) <1 0 0> <1 0 0> 209.7
KCl (mp-23193) <1 1 0> <1 1 0> 222.4
KCl (mp-23193) <1 1 1> <1 1 1> 272.4
DyScO3 (mp-31120) <0 1 0> <1 0 0> 262.1
DyScO3 (mp-31120) <1 1 0> <1 0 0> 262.1
InAs (mp-20305) <1 1 0> <1 1 0> 222.4
InAs (mp-20305) <1 1 1> <1 1 1> 272.4
ZnSe (mp-1190) <1 0 0> <1 0 0> 262.1
ZnSe (mp-1190) <1 1 0> <1 1 0> 148.3
ZnSe (mp-1190) <1 1 1> <1 1 0> 296.5
KTaO3 (mp-3614) <1 0 0> <1 0 0> 209.7
CdS (mp-672) <1 1 0> <1 1 0> 148.3
LiF (mp-1138) <1 0 0> <1 0 0> 262.1
LiF (mp-1138) <1 1 1> <1 0 0> 262.1
Te2W (mp-22693) <0 0 1> <1 1 0> 222.4
Te2W (mp-22693) <1 1 0> <1 1 0> 222.4
YVO4 (mp-19133) <0 0 1> <1 0 0> 52.4
YVO4 (mp-19133) <1 0 0> <1 0 0> 314.5
YVO4 (mp-19133) <1 0 1> <1 0 0> 209.7
TePb (mp-19717) <1 0 0> <1 0 0> 209.7
Te2Mo (mp-602) <0 0 1> <1 0 0> 262.1
Te2Mo (mp-602) <1 0 0> <1 1 0> 222.4
Te2Mo (mp-602) <1 0 1> <1 1 0> 222.4
Ag (mp-124) <1 1 0> <1 1 0> 74.1
Ag (mp-124) <1 1 1> <1 1 1> 90.8
Bi2Te3 (mp-34202) <0 0 1> <1 1 1> 272.4
GaSe (mp-1943) <0 0 1> <1 0 0> 262.1
BN (mp-984) <0 0 1> <1 0 0> 262.1
BN (mp-984) <1 0 0> <1 0 0> 157.2
BN (mp-984) <1 1 0> <1 1 1> 272.4
MoS2 (mp-1434) <0 0 1> <1 1 1> 272.4
Al (mp-134) <1 0 0> <1 0 0> 209.7
LiGaO2 (mp-5854) <0 0 1> <1 1 0> 222.4
LiGaO2 (mp-5854) <0 1 0> <1 0 0> 262.1
LiGaO2 (mp-5854) <0 1 1> <1 0 0> 262.1
Up to 50 entries displayed.
†minimal coincident interface area.

Elasticity

Reference for tensor and properties:
Visualize with ELATE
Stiffness Tensor Cij (GPa)
62 6 6 0 0 0
6 62 6 0 0 0
6 6 62 0 0 0
0 0 0 33 0 0
0 0 0 0 33 0
0 0 0 0 0 33
Compliance Tensor Sij (10-12Pa-1)
16.3 -1.4 -1.4 0 0 0
-1.4 16.3 -1.4 0 0 0
-1.4 -1.4 16.3 0 0 0
0 0 0 30.4 0 0
0 0 0 0 30.4 0
0 0 0 0 0 30.4
Shear Modulus GV
31 GPa
Bulk Modulus KV
25 GPa
Shear Modulus GR
31 GPa
Bulk Modulus KR
25 GPa
Shear Modulus GVRH
31 GPa
Bulk Modulus KVRH
25 GPa
Elastic Anisotropy
0.03
Poisson's Ratio
0.06

Piezoelectricity

Reference for tensor and properties: Methodology
Piezoelectric Tensor eij (C/m2)
0.00000 0.00000 0.00000 0.00000 0.05264 0.00000
0.00000 0.00000 0.00000 0.00000 0.00000 0.05264
0.00000 0.00000 0.00000 0.05264 0.00000 0.00000
Piezoelectric Modulus ‖eij‖max
0.05264 C/m2
Crystallographic Direction vmax
-2.00000
-5.00000
-1.00000

Dielectric Properties

Reference for tensor and properties: Methodology
Dielectric Tensor εij∞ (electronic contribution)
2.18 0.00 0.00
0.00 2.18 0.00
0.00 0.00 2.18
Dielectric Tensor εij (total)
3.94 0.00 0.00
0.00 3.94 0.00
0.00 0.00 3.94
Polycrystalline dielectric constant εpoly∞
(electronic contribution)
2.18
Polycrystalline dielectric constant εpoly
(total)
3.94
Refractive Index n
1.48
Potentially ferroelectric?
Unknown

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
AlPO4 (mp-5724) 0.3646 0.003 3
AlPO4 (mp-5859) 0.3307 0.011 3
AlPO4 (mp-37990) 0.3579 0.014 3
AlPO4 (mp-557842) 0.3686 0.011 3
AlPO4 (mp-675254) 0.4103 0.011 3
CsAlSiO4 (mp-561457) 0.7073 0.000 4
CsBePO4 (mp-15395) 0.6115 0.000 4
SiO2 (mp-559091) 0.1698 0.004 2
SiO2 (mp-542814) 0.1454 0.004 2
SiO2 (mp-556454) 0.1642 0.008 2
SiO2 (mp-555235) 0.1276 0.003 2
CrN2 (mp-1096909) 0.1535 0.333 2
Up to 5 similar elemental, binary, ternary, quaternary, etc. structures displayed (dissimilarity threshold 0.75). Ehull: energy above hull per atom [eV].

Synthesis Descriptions

10.1007/bf00248171
Sol-gel TiO2-SiO2 films were deposited on 316L stainless steel by dip coating process from a sono-catalysed sol of composition 30TiO2-70SiO2 prepared from a mixture of Ti(OC2H5)4 and Si(OC2H5)4, absol [...]
10.1007/s10853-012-6597-6
Bisphenol A polycarbonate (Makrolon RX 1805) from Bayer MaterialScience AG (Germany) was used as polymer matrix. A type of hydrophobic nano-SiO2 (Aerosil R8200) was chosen as filler, which was supplie [...]
chef hat mixing beaker

Explore more synthesis descriptions for materials of composition SiO2.

Text computed by synthesisproject.org.

Calculation Summary

Elasticity

Methodology

Structure Optimization

Run Type
GGA
Energy Cutoff
520 eV
# of K-points
None
U Values
--
Pseudopotentials
VASP PAW: O Si
Final Energy/Atom
-7.9104 eV
Corrected Energy
-201.0870 eV
-201.0870 eV = -189.8504 eV (uncorrected energy) - 11.2366 eV (MP Anion Correction)

Detailed input parameters and outputs for all calculations

Show JSON History Show BibTex Citation Download BibTex Citation
ICSD IDs
  • 162617
  • 44269
  • 162616
  • 24587
Submitted by
User remarks:
  • Cristobalite beta
  • Silicon oxide

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)