Crystal Lab › Prototype structures › Orthorhombic
AgNO₂ (F5₁₂)
Orthorhombic · space group Imm2 (No. 44) · Pearson oI8 · Strukturbericht F512 · mineral: silver nitrite
Symmetry elements and Wyckoff positions (interactive)
AgNO₂ (F5₁₂) in Imm2
SettingUnit cell
- Lattice constants
- a = 6.172 Å, b = 3.528 Å, c = 5.181 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 112.8 ų
- Atoms in the conventional cell
- 8 (Ag 2, N 2, O 4)
- Formula units Z
- 2
- Pearson symbol
- oI8 — orthorhombic, body-centred lattice, 8 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| Ag1 | Ag | 2a | 2 | 0.0000 | 0.0000 | 0.0000 |
| N2 | N | 2a | 2 | 0.0000 | 0.0000 | 0.4446 |
| O3 | O | 4c | 4 | 0.8299 | 0.0000 | 0.5747 |
The multiplicity and the Wyckoff letter say how many copies of the site the group makes in one cell and on which kind of symmetry element the site sits; the 8 atoms drawn above are these sites multiplied by all 8 operations. Press Wyckoff under Colour to see the sites, and tick a symmetry element on the left to see which atoms lie on it.
How to read the label
ABC2_oI8_44_a_a_c-002: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oI8, then the space-group number 44, then the Wyckoff letters occupied by each element in turn (Ag: 2a; N: 2a; O: 4c). Two structures with the same label are the same arrangement with different cell parameters or coordinates.
Other compounds with this structure
NaNO₃ (F5₅) <!--beginning with an
Note: F5₁₂, Silver Nitrite.
Source
Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC2_oI8_44_a_a_c-002 (M. J. Mehl et al., Comput. Mater. Sci. 136, S1 (2017); D. Hicks et al., ibid. 161, S1 (2019) and 199, 110450 (2021); S. Eckert et al., ibid. 240, 112988 (2024)). Symmetry elements, Wyckoff assignment and the diagram are computed on this page from the group operations.
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