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Crystal Lab › Prototype structures › Monoclinic

Ba₄Ir₃O₁₀

Monoclinic · space group P121/c1 (No. 14) · Pearson mP34

Symmetry elements and Wyckoff positions (interactive)

Ba₄Ir₃O₁₀ in P121/c1

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

Unit cell

Lattice constants
a = 7.295 Å, b = 13.222 Å, c = 5.788 Å; α = 90.00°, β = 113.94°, γ = 90.00°
Cell volume
510.2 ų
Atoms in the conventional cell
34 (Ir 6, Br 8, O 20)
Formula units Z
2
Pearson symbol
mP34 — monoclinic, primitive lattice, 34 atoms per conventional cell
Symmetry operations
4 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ir1Ir2a20.00000.00000.0000
Br2Br4e40.92590.63870.9564
Br3Br4e40.51980.61310.2558
Ir4Ir4e40.24960.85050.1157
O5O4e40.06470.15000.0468
O6O4e40.78290.02910.1164
O7O4e40.78290.03820.6585
O8O4e40.46250.15310.7347
O9O4e40.76380.23390.1777

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 34 atoms drawn above are these sites multiplied by all 4 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

A4B3C10_mP34_14_2e_ae_5e-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol mP34, then the space-group number 14, then the Wyckoff letters occupied by each element in turn (Ir: 2a; Br: 4e; Br: 4e; Ir: 4e; O: 4e; O: 4e; O: 4e; O: 4e; O: 4e). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Ba₄Ru₃O₁₀ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A4B3C10_mP34_14_2e_ae_5e-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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