Crystal Lab › Prototype structures › Tetragonal
[(CH₃)₄N][Cu₂(NCS)₃]
Tetragonal · space group P42cm (No. 101) · Pearson tP112
Symmetry elements and Wyckoff positions (interactive)
[(CH₃)₄N][Cu₂(NCS)₃] in P42cm
SettingUnit cell
- Lattice constants
- a = 11.164 Å, b = 11.164 Å, c = 10.638 Å; α = 90.00°, β = 90.00°, γ = 90.00°
- Cell volume
- 1325.9 ų
- Atoms in the conventional cell
- 112 (N 16, H 48, C 28, Cu 8, S 12)
- Formula units Z
- 4
- Pearson symbol
- tP112 — tetragonal, primitive lattice, 112 atoms per conventional cell
- Symmetry operations
- 8 per cell
Crystallographic sites
| Site | Element | Wyckoff | Multiplicity | x | y | z |
|---|---|---|---|---|---|---|
| N14 | N | 4c | 4 | 0.0000 | 0.5000 | 0.2422 |
| H8 | H | 8e | 8 | 0.1098 | 0.5764 | 0.3705 |
| H9 | H | 8e | 8 | 0.0671 | 0.6654 | 0.2676 |
| C1 | C | 4d | 4 | 0.1133 | 0.1133 | 0.0015 |
| C2 | C | 4d | 4 | 0.6142 | 0.6142 | 0.8417 |
| C3 | C | 4d | 4 | 0.7715 | 0.7715 | 0.5165 |
| Cu6 | Cu | 4d | 4 | 0.9140 | 0.9140 | 0.7148 |
| Cu7 | Cu | 4d | 4 | 0.5851 | 0.5851 | 0.5552 |
| N15 | N | 4d | 4 | 0.8907 | 0.8907 | 0.8934 |
| N16 | N | 4d | 4 | 0.6088 | 0.6088 | 0.7347 |
| N17 | N | 4d | 4 | 0.8234 | 0.8234 | 0.5902 |
| S18 | S | 4d | 4 | 0.1225 | 0.1225 | 0.1575 |
| S19 | S | 4d | 4 | 0.6245 | 0.6245 | 0.9977 |
| S20 | S | 4d | 4 | 0.6947 | 0.6947 | 0.4111 |
| C4 | C | 8e | 8 | 0.0434 | 0.6012 | 0.3209 |
| C5 | C | 8e | 8 | 0.1005 | 0.4577 | 0.1612 |
| H8 | H | 8e | 8 | 0.1098 | 0.5764 | 0.3705 |
| H9 | H | 8e | 8 | 0.0671 | 0.6654 | 0.2676 |
| H10 | H | 8e | 8 | 0.9805 | 0.6272 | 0.3745 |
| H11 | H | 8e | 8 | 0.0765 | 0.3917 | 0.1106 |
| H12 | H | 8e | 8 | 0.1235 | 0.5225 | 0.1085 |
| H13 | H | 8e | 8 | 0.1665 | 0.4348 | 0.2125 |
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 112 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
A7B2C12D4E3_tP112_101_3d2e_2d_6e_c3d_3d-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol tP112, then the space-group number 101, then the Wyckoff letters occupied by each element in turn (N: 4c; H: 8e; H: 8e; C: 4d; C: 4d; C: 4d; Cu: 4d; Cu: 4d; N: 4d; N: 4d; N: 4d; S: 4d; S: 4d; S: 4d; C: 8e; C: 8e; H: 8e; H: 8e; H: 8e; H: 8e; H: 8e; H: 8e). 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 A7B2C12D4E3_tP112_101_3d2e_2d_6e_c3d_3d-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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