Disordered Calcined AlPO₄-11 AlO₄P

Unit cell

Lattice constants

a = 18.485 Å, b = 8.370 Å, c = 13.533 Å; α = 90.00°, β = 90.00°, γ = 90.00°

Cell volume

2093.9 ų

Atoms in the conventional cell

120 (O 80, Al 40)

Formula units Z

40

Pearson symbol

oI120 — orthorhombic, body-centred lattice, 120 atoms per conventional cell

Symmetry operations

16 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 120 atoms drawn above are these sites multiplied by all 16 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

AB2_oI120_74_h2j_aef2i3j-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oI120, then the space-group number 74, then the Wyckoff letters occupied by each element in turn (O: 4a; O: 4e; O: 8f; Al: 8h; O: 8i; O: 8i; Al: 16j; Al: 16j; O: 16j; O: 16j; O: 16j). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Note: Disordered AlPO₄-11.

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB2_oI120_74_h2j_aef2i3j-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.