Arcanite (β-K₂SO₄, H1₆)

Unit cell

Lattice constants

a = 7.476 Å, b = 5.763 Å, c = 10.071 Å; α = 90.00°, β = 90.00°, γ = 90.00°

Cell volume

433.9 ų

Atoms in the conventional cell

28 (K 8, O 16, S 4)

Formula units Z

4

Pearson symbol

oP28 — orthorhombic, primitive lattice, 28 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 28 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

A2B4C_oP28_62_2c_2cd_c-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oP28, then the space-group number 62, then the Wyckoff letters occupied by each element in turn (K: 4c; K: 4c; O: 4c; O: 4c; S: 4c; O: 8d). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Ba₂CoO₄, Ba₂CrO₄, Ba₂GeO₄, Ba₂GeS₄, Ba₂PdD₄, Ba₂SiO₄, Ba₂SiS₄, Ba₂TiS₄, Ca₂CO₄, Ca₂SiO₄, Cs₂CrO₄, Cs₂FeO₄, Cs₂MgD₄, Cs₂MnO₄, Cs₂MoO₄, Cs₂MoS₄, Cs₂MoSe₄, Cs₂RuO₄, Cs₂SO₄, Cs₂SeO₄, Cs₂TeO₄, Cs₂WO₄, Cs₂WS₄, Cs₂ZnD₄, Eu₂PdD₄, Eu₂SiO₄, K₂CrO₄, K₂FeO₄, K₂MnO₄, K₂MoS₄, K₂RuO₄, K₂SeO₄, K₂WS₄, K₂WSe₄, K₂ZnD₄, Rb₂CrO₄, Rb₂MgD₄, Rb₂MgH₄, Rb₂MnO₄, Rb₂MoO₄, Rb₂MoS₄, Rb₂RuO₄, Rb₂SO₄, Rb₂SeO₄, Rb₂WS₄, Rb₂ZnD₄, Sr₂CO₄, Sr₂PdD₄, Sr₂SiO₄, Tl₂CrO₄, Tl₂SO₄, Tl₂SeO₄, (NH₄)₂BeF₄, (NH₄)₂MoS₄, (NH₄)₂SO₄, (NH₄)₂WS₄, (NH₄)₂WSe₄, (NH₄)₂ZnCl₄ <!--beginning with an

Note: H1₆, Arcanite.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A2B4C_oP28_62_2c_2cd_c-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.