material

Li2FeSiO4

ID:

mp-18968

DOI:

10.17188/1193743


Tags: Dilithium iron silicate

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
AFM
Formation Energy / Atom
-2.631 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
3.13 g/cm3

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

Decomposes To
Stable
Band Gap
3.282 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
Pmn21 [31]
Hall
P 2ac 2
Point Group
mm2
Crystal System
orthorhombic

Electronic Structure

Topological data for ICSD ID 161649 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%)

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]
KP(HO2)2 (mp-23959) <1 0 1> <1 0 0> 137.2
AlN (mp-661) <1 1 0> <0 0 1> 27.1
Au (mp-81) <1 0 0> <0 1 1> 209.1
LiAlO2 (mp-3427) <0 0 1> <1 1 0> 327.5
LiAlO2 (mp-3427) <1 1 0> <1 1 0> 46.8
Cu (mp-30) <1 0 0> <1 0 1> 131.2
Al (mp-134) <1 0 0> <1 0 1> 131.2
Mg (mp-153) <0 0 1> <1 1 0> 140.3
ZnSe (mp-1190) <1 0 0> <1 0 1> 131.2
MgO (mp-1265) <1 0 0> <1 0 1> 218.7
Ag (mp-124) <1 0 0> <0 1 1> 209.1
TiO2 (mp-390) <1 1 1> <1 0 1> 218.7
AlN (mp-661) <1 1 1> <1 0 0> 171.5
GaAs (mp-2534) <1 0 0> <1 0 1> 131.2
KTaO3 (mp-3614) <1 0 0> <1 0 1> 131.2
TiO2 (mp-2657) <1 0 0> <0 1 0> 222.7
Te2W (mp-22693) <0 1 1> <0 1 1> 292.7
C (mp-66) <1 1 0> <0 0 1> 54.3
TePb (mp-19717) <1 1 0> <0 0 1> 244.3
SiC (mp-11714) <1 0 0> <0 0 1> 217.1
MgF2 (mp-1249) <0 0 1> <0 1 1> 334.5
CdS (mp-672) <1 1 1> <1 0 1> 262.5
SiC (mp-7631) <1 1 0> <0 0 1> 81.4
BaF2 (mp-1029) <1 0 0> <0 1 0> 159.0
NaCl (mp-22862) <1 0 0> <1 0 1> 131.2
SiC (mp-11714) <1 1 0> <0 0 1> 54.3
Ge (mp-32) <1 0 0> <1 0 1> 131.2
YAlO3 (mp-3792) <1 0 0> <0 0 1> 81.4
SiO2 (mp-6930) <1 0 1> <0 1 1> 209.1
KP(HO2)2 (mp-23959) <1 1 0> <1 0 0> 137.2
LaF3 (mp-905) <1 1 0> <1 1 0> 93.6
BN (mp-984) <1 0 1> <0 0 1> 81.4
KCl (mp-23193) <1 1 0> <1 0 0> 171.5
DyScO3 (mp-31120) <0 1 0> <1 0 1> 43.7
InP (mp-20351) <1 1 0> <0 1 1> 250.9
GdScO3 (mp-5690) <1 1 1> <1 1 1> 216.3
InP (mp-20351) <1 1 1> <1 1 0> 187.1
TbScO3 (mp-31119) <0 1 0> <1 0 1> 43.7
YAlO3 (mp-3792) <0 1 0> <1 1 0> 233.9
LaF3 (mp-905) <0 0 1> <0 1 0> 318.1
Ge3(BiO3)4 (mp-23560) <1 1 0> <0 0 1> 162.9
LaAlO3 (mp-2920) <1 0 0> <0 0 1> 217.1
TiO2 (mp-390) <1 0 1> <0 0 1> 352.9
LaAlO3 (mp-2920) <1 0 1> <0 0 1> 298.6
SiC (mp-11714) <1 1 1> <1 0 1> 218.7
LaAlO3 (mp-2920) <1 1 0> <0 0 1> 244.3
LiF (mp-1138) <1 0 0> <1 0 1> 131.2
YAlO3 (mp-3792) <0 0 1> <1 0 0> 171.5
Ag (mp-124) <1 1 0> <0 0 1> 217.1
AlN (mp-661) <0 0 1> <1 0 0> 34.3
Up to 50 entries displayed.
minimal coincident interface area.

Elasticity

Reference for tensor and properties:
Stiffness Tensor Cij (GPa)
130 66 42 0 0 0
66 214 64 0 0 0
42 64 138 0 0 0
0 0 0 45 0 0
0 0 0 0 35 0
0 0 0 0 0 43
Compliance Tensor Sij (10-12Pa-1)
9.5 -2.4 -1.8 0 0 0
-2.4 6 -2.1 0 0 0
-1.8 -2.1 8.7 0 0 0
0 0 0 22.3 0 0
0 0 0 0 28.6 0
0 0 0 0 0 23
Shear Modulus GV
45 GPa
Bulk Modulus KV
92 GPa
Shear Modulus GR
44 GPa
Bulk Modulus KR
85 GPa
Shear Modulus GVRH
44 GPa
Bulk Modulus KVRH
88 GPa
Elastic Anisotropy
0.28
Poisson's Ratio
0.28

Piezoelectricity

Reference for tensor and properties: Methodology
Piezoelectric Tensor eij (C/m2)
0.00000 0.00000 0.00000 0.00000 -0.24641 0.00000
0.00000 0.00000 0.00000 -0.39004 0.00000 0.00000
-0.54219 -0.53124 0.97454 0.00000 0.00000 0.00000
Piezoelectric Modulus ‖eijmax
1.23528 C/m2
Crystallographic Direction vmax
0.00000
0.00000
1.00000

Dielectric Properties

Reference for tensor and properties: Methodology
Dielectric Tensor εij (electronic contribution)
2.92 0.00 0.00
0.00 3.34 0.00
0.00 0.00 3.28
Dielectric Tensor εij (total)
5.93 0.00 0.00
0.00 8.12 0.00
0.00 0.00 9.62
Polycrystalline dielectric constant εpoly
(electronic contribution)
3.18
Polycrystalline dielectric constant εpoly
(total)
7.89
Refractive Index n
1.78
Potentially ferroelectric?
Unknown

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
Li3AsO4 (mp-9197) 0.2322 0.000 3
Li3CrO4 (mp-770632) 0.2120 0.000 3
Li3VS4 (mp-755642) 0.2163 0.037 3
Li3VO4 (mp-19219) 0.2351 0.000 3
Li3PO4 (mp-13725) 0.1861 0.000 3
Li2SiNiO4 (mp-775084) 0.1075 0.016 4
Li2MnSiO4 (mp-849394) 0.0958 0.005 4
Li2SiNiO4 (mp-767915) 0.1003 0.021 4
Li2MnSiO4 (mp-566680) 0.0763 0.000 4
Li2MnSiO4 (mp-768020) 0.0792 0.020 4
CdP2 (mp-913) 0.5333 0.000 2
ZnP2 (mp-2782) 0.5027 0.000 2
ZnP2 (mp-11025) 0.5045 0.000 2
FeO (mp-781777) 0.5172 0.947 2
CdP2 (mp-12112) 0.5334 0.000 2
Si (mp-1079297) 0.6566 0.072 1
Si (mp-971661) 0.5581 0.080 1
C (mp-1078845) 0.5749 0.266 1
C (mp-1080826) 0.6008 0.299 1
Si (mp-1095269) 0.6394 0.094 1
Up to 5 similar elemental, binary, ternary, quaternary, etc. structures displayed (dissimilarity threshold 0.75). Ehull: energy above hull per atom [eV].

Synthesis Descriptions

The Li1.95FeSiO4/C material was prepared by the solid state reaction method. Li2CO3 (99.5%), FeC2O42H2O (99.7%), nano SiO2 (99.5%, Anhui China) were used as the starting materials in a molar ratio of [...]
Li2FeSiO4 cathode material was synthesized by a hydrothermal method under the protection of argon atmosphere. 0.04mol LiOHH2O (98%, Aldrich) was dissolved into 50mL oxygen-free H2O in a round flask [...]
chef hat mixing beaker

Explore more synthesis descriptions for materials of composition Li2FeSiO4.

Text computed by synthesisproject.org.

Calculation Summary

Elasticity

Methodology

Structure Optimization

Run Type
GGA+U
Energy Cutoff
520 eV
# of K-points
None
U Values
Fe: 5.3 eV
Pseudopotentials
VASP PAW: Li_sv Fe_pv Si O
Final Energy/Atom
-6.6259 eV
Corrected Energy
-234.1973 eV
-234.1973 eV = -212.0286 eV (uncorrected energy) - 11.2366 eV (MP Anion Correction) - 10.9320 eV (MP Advanced Correction)

Detailed input parameters and outputs for all calculations


Show JSON History Show BibTex Citation Download BibTex Citation
ICSD IDs
  • 161649
  • 186516
  • 161306
Submitted by
User remarks:
  • Dilithium iron silicate

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)