material

Ag2S
ID:

mp-32884
DOI:

10.17188/1206428

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
-0.274 eV

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

Energy Above Hull / Atom
0.004 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
6.38 g/cm3

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

Decomposes To
Ag2S
Band Gap
1.305 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
C2/m [12]
Hall
-C 2y
Point Group
2/m
Crystal System
monoclinic
We have not yet calculated a detailed bandstructure for this material

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]
MgF2 (mp-1249) <1 1 1> <1 0 0> 0.002 330.3
LiNbO3 (mp-3731) <1 1 0> <0 1 1> 0.008 127.3
NdGaO3 (mp-3196) <1 0 1> <0 0 1> 0.011 269.0
CdWO4 (mp-19387) <0 1 1> <0 0 1> 0.012 201.7
CdWO4 (mp-19387) <1 0 0> <1 0 1> 0.014 250.5
Te2W (mp-22693) <1 0 0> <1 0 0> 0.015 293.6
Te2W (mp-22693) <0 0 1> <1 0 1> 0.017 200.4
LiTaO3 (mp-3666) <1 1 1> <1 0 0> 0.017 256.9
Te2W (mp-22693) <0 1 1> <0 0 1> 0.020 235.4
LiGaO2 (mp-5854) <0 1 1> <1 1 0> 0.022 130.6
TiO2 (mp-2657) <1 1 0> <0 0 1> 0.026 235.4
MgO (mp-1265) <1 1 1> <1 0 1> 0.026 250.5
LiNbO3 (mp-3731) <0 0 1> <0 1 1> 0.028 190.9
LiAlO2 (mp-3427) <1 1 0> <0 0 1> 0.028 235.4
KP(HO2)2 (mp-23959) <0 0 1> <1 0 1> 0.030 150.3
WS2 (mp-224) <1 0 0> <0 0 1> 0.030 134.5
LiF (mp-1138) <1 0 0> <1 0 0> 0.032 183.5
LiTaO3 (mp-3666) <1 1 0> <0 1 1> 0.032 127.3
MgO (mp-1265) <1 0 0> <0 0 1> 0.034 269.0
YAlO3 (mp-3792) <0 0 1> <0 0 1> 0.035 168.1
SrTiO3 (mp-4651) <1 0 1> <0 0 1> 0.037 269.0
Te2Mo (mp-602) <0 0 1> <1 1 1> 0.039 294.7
GaTe (mp-542812) <1 0 0> <0 1 1> 0.040 318.2
Ni (mp-23) <1 1 0> <1 1 0> 0.042 261.2
ZrO2 (mp-2858) <0 1 0> <1 1 1> 0.047 221.0
Bi2Te3 (mp-34202) <0 0 1> <0 1 0> 0.047 270.1
MgF2 (mp-1249) <1 1 0> <1 0 0> 0.047 330.3
C (mp-66) <1 0 0> <0 0 1> 0.048 100.9
SiC (mp-8062) <1 1 1> <1 0 0> 0.050 330.3
KCl (mp-23193) <1 0 0> <0 0 1> 0.050 201.7
TiO2 (mp-390) <1 0 1> <0 1 0> 0.052 162.1
LiTaO3 (mp-3666) <0 0 1> <0 1 1> 0.053 190.9
MoS2 (mp-1434) <1 0 0> <1 0 1> 0.053 200.4
ZrO2 (mp-2858) <0 1 1> <0 0 1> 0.053 235.4
Cu (mp-30) <1 1 0> <1 0 1> 0.054 150.3
NdGaO3 (mp-3196) <1 0 0> <1 1 0> 0.054 130.6
KP(HO2)2 (mp-23959) <0 1 0> <1 0 1> 0.055 150.3
KP(HO2)2 (mp-23959) <0 1 1> <0 1 0> 0.056 108.0
LiGaO2 (mp-5854) <0 0 1> <0 1 1> 0.059 254.5
Au (mp-81) <1 0 0> <1 1 0> 0.062 261.2
NdGaO3 (mp-3196) <0 0 1> <0 0 1> 0.063 336.2
C (mp-48) <0 0 1> <0 1 0> 0.063 216.1
YAlO3 (mp-3792) <0 1 1> <0 1 1> 0.066 190.9
Fe2O3 (mp-24972) <1 0 0> <0 1 0> 0.066 216.1
WS2 (mp-224) <0 0 1> <0 0 1> 0.068 134.5
MoS2 (mp-1434) <0 0 1> <0 0 1> 0.068 134.5
SiC (mp-8062) <1 1 0> <1 0 1> 0.069 300.6
Bi2Se3 (mp-541837) <0 0 1> <0 0 1> 0.072 302.6
C (mp-48) <1 1 0> <1 1 0> 0.073 65.3
BN (mp-984) <1 0 0> <1 1 0> 0.073 195.9
Up to 50 entries displayed.
†minimal coincident interface area.

Elasticity

Reference for tensor and properties:
Visualize with ELATE
Stiffness Tensor Cij (GPa)
43 9 40 0 -0 0
9 26 26 0 -0 0
40 26 91 0 0 0
0 0 0 11 0 0
-0 -0 0 0 7 0
0 0 0 0 0 3
Compliance Tensor Sij (10-12Pa-1)
39.7 4 -18.4 0 2.6 0
4 55.1 -17.2 0 4.6 0
-18.4 -17.2 23.8 0 -3.1 0
0 0 0 89.8 0 0.3
2.6 4.6 -3.1 0 138.3 0
0 0 0 0.3 0 354.8
Shear Modulus GV
10 GPa
Bulk Modulus KV
34 GPa
Shear Modulus GR
6 GPa
Bulk Modulus KR
18 GPa
Shear Modulus GVRH
8 GPa
Bulk Modulus KVRH
26 GPa
Elastic Anisotropy
3.65
Poisson's Ratio
0.36

Piezoelectricity

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

Dielectric Properties

Reference for tensor and properties: Methodology
Dielectric Tensor εij∞ (electronic contribution)
8.89 -0.51 -0.15
-0.51 9.40 -0.02
-0.15 -0.02 7.72
Dielectric Tensor εij (total)
11.95 0.16 -0.70
0.16 11.97 -0.38
-0.70 -0.38 10.55
Polycrystalline dielectric constant εpoly∞
(electronic contribution)
8.67
Polycrystalline dielectric constant εpoly
(total)
11.49
Refractive Index n
2.94
Potentially ferroelectric?
Unknown

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
Ag2S (mp-36216) 0.3154 0.005 2
Ag2S (mp-556225) 0.2888 0.003 2
CeSe2 (mp-1080320) 0.7249 0.358 2
Ag2S (mp-32669) 0.2432 0.003 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

10.1002/asia.201300066
In this study, Ag2O nanocubes, rhombicuboctahedra, octahedra, and extended hexapods were synthesized in an aqueous solution following our reported procedure without the use of a capping surfactant.8 T [...]
10.1007/s00339-016-0536-3
The technology of colloidal Ag2S QD preparation, as well as the morphology and absorption properties of the dye solution and QDs dispersed in gelatin, was described elsewhere [10, 13]. Briefly, two so [...]
chef hat mixing beaker

Explore more synthesis descriptions for materials of composition Ag2S.

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: Ag S
Final Energy/Atom
-3.3151 eV
Corrected Energy
-21.2174 eV
-21.2174 eV = -19.8905 eV (uncorrected energy) - 1.3269 eV (MP Anion Correction)

Detailed input parameters and outputs for all calculations

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User remarks:
  • Ordering of Disordered Crystal

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)