Manganese-leonite 185K [K₂Mn(SO₄)₂cdot4H₂O]

Unit cell

Lattice constants

a = 24.082 Å, b = 9.549 Å, c = 19.839 Å; α = 90.00°, β = 150.14°, γ = 90.00°

Cell volume

2271.3 ų

Atoms in the conventional cell

200 (Mn 8, O 96, H 64, K 16, S 16)

Formula units Z

8

Pearson symbol

mC200 — monoclinic, base-centred lattice, 200 atoms per conventional cell

Symmetry operations

8 per cell

Crystallographic sites

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 200 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

A8B2CD12E2_mC200_15_8f_2f_ae_2e11f_2f-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mC200, then the space-group number 15, then the Wyckoff letters occupied by each element in turn (Mn: 4a; Mn: 4e; O: 4e; O: 4e; H: 8f; H: 8f; H: 8f; H: 8f; H: 8f; H: 8f; H: 8f; H: 8f; K: 8f; K: 8f; O: 8f; O: 8f; O: 8f; O: 8f; O: 8f; O: 8f; O: 8f; O: 8f; O: 8f; O: 8f; O: 8f; S: 8f; S: 8f). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

K₂Mg(SO₄)₂cdot4H₂O (leonite), K₂Fe(SO₄)₂cdot4H₂O (mereiterite) <!--beginning with an

Note: Mn-leonite (185K).

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A8B2CD12E2_mC200_15_8f_2f_ae_2e11f_2f-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.