Crystal Lab › Ion conductors & batteries
Silver chloride (Frenkel defects) AgCl
AB, 6:6 (rock salt) · space group Fm-3m (No. 225) · Z = 4
Unit cell
- Lattice constants
- a = 5.549 Å, b = 5.549 Å, c = 5.549 Å; α = 90°, β = 90°, γ = 90°
- Cell volume
- 170.9 ų
- Atoms in the cell
- 8 (Ag 4, Cl 4)
- Formula units Z
- 4
- Calculated density
- 5.57 g cm⁻³
- Shortest contact
- 2.774 Å
Coordination
- Ag
- CN 6 at 2.77 Å (6 Cl)
- Cl
- CN 6 at 2.77 Å (6 Ag)
About the structure
- Rock-salt structure, but the small polarisable Ag⁺ readily leaves its octahedral site for an empty tetrahedral hole, leaving a vacancy behind: a Frenkel defect (the Defects control shows one).
- Coordination: Ag 6, Cl 6.
- These interstitial Ag⁺ ions carry the ionic conductivity and start the photographic latent image.
Atom positions (fractional, one cell)
| Atom | x | y | z |
|---|---|---|---|
| Ag | 0.5000 | 0.5000 | 0.5000 |
| Ag | 0.5000 | 0.0000 | 0.0000 |
| Ag | 0.0000 | 0.5000 | 0.0000 |
| Ag | 0.0000 | 0.0000 | 0.5000 |
| Cl | 0.0000 | 0.0000 | 0.0000 |
| Cl | 0.0000 | 0.5000 | 0.5000 |
| Cl | 0.5000 | 0.0000 | 0.5000 |
| Cl | 0.5000 | 0.5000 | 0.0000 |
Z, coordination numbers, distances, density and packing on this page are computed from these coordinates.
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Open Silver chloride (Frenkel defects) in the 3D viewer → · All structures