Skip to content

Crystal Lab › Prototype structures › Hexagonal

Ti₂InB₂

Hexagonal · space group P-6m2 (No. 187) · Pearson hP5

Symmetry elements and Wyckoff positions (interactive)

Ti₂InB₂ in P-6m2

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

Unit cell

Lattice constants
a = 3.077 Å, b = 3.077 Å, c = 7.917 Å; α = 90.00°, β = 90.00°, γ = 120.00°
Cell volume
64.9 ų
Atoms in the conventional cell
5 (B 2, In 1, Ti 2)
Formula units Z
1
Pearson symbol
hP5 — hexagonal / trigonal, primitive lattice, 5 atoms per conventional cell
Symmetry operations
12 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
B1B1a10.00000.00000.0000
In3In1b10.00000.00000.5000
B2B1c10.33330.66670.0000
Ti4Ti2i20.66670.33330.1982

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 5 atoms drawn above are these sites multiplied by all 12 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

A2BC2_hP5_187_ac_b_i-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol hP5, then the space-group number 187, then the Wyckoff letters occupied by each element in turn (B: 1a; In: 1b; B: 1c; Ti: 2i). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

Hf₂InB₂, Hf₂SnB₂, Zr₂InB₂, Zr₂TlB₂ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry A2BC2_hP5_187_ac_b_i-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.

 ·  Space group P-6m2 (13 prototypes)  ·  All prototypes  ·  β-CuI (Bührer-Hälg) →