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Ag(tcm)(pyz) [AgC₈N₅H₄]

Orthorhombic · space group Pnma (No. 62) · Pearson oP72

Symmetry elements and Wyckoff positions (interactive)

Ag(tcm)(pyz) [AgC₈N₅H₄] in Pnma

Setting
Loading the group…
x = 0.10, y = 0.17, z = 0.08

Unit cell

Lattice constants
a = 13.466 Å, b = 7.445 Å, c = 9.175 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
919.8 ų
Atoms in the conventional cell
72 (Ag 4, C 32, N 20, H 16)
Formula units Z
4
Pearson symbol
oP72 — orthorhombic, primitive lattice, 72 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ag1Ag4c40.83540.25000.5274
C2C4c40.94110.25000.1633
C3C4c40.07870.25000.9962
C4C4c40.91170.25000.9001
C5C4c40.97660.25000.0200
N10N4c40.91380.25000.2804
N11N4c40.16190.25000.9763
N12N4c40.36090.25000.6985
C6C8d80.67770.34250.1443
C7C8d80.60070.15690.9256
H8H8d80.71000.08670.2355
H9H8d80.56880.41390.8341
N13N8d80.63880.43620.0349

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 72 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

AB8C4D5_oP72_62_c_4c2d_2d_3cd-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP72, then the space-group number 62, then the Wyckoff letters occupied by each element in turn (Ag: 4c; C: 4c; C: 4c; C: 4c; C: 4c; N: 4c; N: 4c; N: 4c; C: 8d; C: 8d; H: 8d; H: 8d; N: 8d). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB8C4D5_oP72_62_c_4c2d_2d_3cd-001 (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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