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Crystal Lab › Prototype structures › Orthorhombic

TiFeSi

Orthorhombic · space group Ima2 (No. 46) · Pearson oI36

Symmetry elements and Wyckoff positions (interactive)

TiFeSi in Ima2

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

Unit cell

Lattice constants
a = 6.997 Å, b = 10.830 Å, c = 6.287 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
476.4 ų
Atoms in the conventional cell
36 (Fe 12, Si 12, Ti 12)
Formula units Z
12
Pearson symbol
oI36 — orthorhombic, body-centred lattice, 36 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Fe1Fe4a40.00000.00000.2500
Si3Si4b40.25000.52530.0054
Ti5Ti4b40.25000.72070.7706
Ti6Ti4b40.25000.99790.9177
Ti7Ti4b40.25000.29960.7963
Fe2Fe8c80.52950.62360.1199
Si4Si8c80.50600.83250.9952

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 36 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

ABC_oI36_46_ac_bc_3b-001: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oI36, then the space-group number 46, then the Wyckoff letters occupied by each element in turn (Fe: 4a; Si: 4b; Ti: 4b; Ti: 4b; Ti: 4b; Fe: 8c; Si: 8c). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

DyMnGa, ErMnGa, FeNbGe, GdMnGa, HfOsSi, HfRuAs, HfRuSi, HoMnGa, NbReSi, NbRuSi, TaReSi, TaRuSi, TiIrSi, TiOsGe, TiOsSi, TiRhGe, TiRuAs, TiRuGe, RhMnGe, RuTiSi, RuZrGe, TaMnGe, TaMnSi, TbMnGa, TiFeGe, YMnGa <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry ABC_oI36_46_ac_bc_3b-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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