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Crystal Lab › Prototype structures › Monoclinic

Rb₂C₂O₄cdotH₂O

Monoclinic · space group C12/c1 (No. 15) · Pearson mC36

Symmetry elements and Wyckoff positions (interactive)

Rb₂C₂O₄cdotH₂O in C12/c1

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

Unit cell

Lattice constants
a = 9.662 Å, b = 6.350 Å, c = 16.955 Å; α = 90.00°, β = 141.91°, γ = 90.00°
Cell volume
641.7 ų
Atoms in the conventional cell
36 (H 4, C 8, O 16, Rb 8)
Formula units Z
4
Pearson symbol
mC36 — monoclinic, base-centred lattice, 36 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
H2H4e40.00000.22330.2500
C1C8f80.04420.07160.0546
O3O8f80.97880.02480.0933
O4O8f80.17020.22680.0940
Rb5Rb8f80.00870.56560.1297

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 36 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

A2BC4D2_mC36_15_f_e_2f_f-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mC36, then the space-group number 15, then the Wyckoff letters occupied by each element in turn (H: 4e; C: 8f; O: 8f; O: 8f; Rb: 8f). 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 A2BC4D2_mC36_15_f_e_2f_f-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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