Skip to content

Crystal Lab › Prototype structures › Orthorhombic

BaZnF₄

Orthorhombic · space group Cmc21 (No. 36) · Pearson oC24

Symmetry elements and Wyckoff positions (interactive)

BaZnF₄ in Cmc21

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

Unit cell

Lattice constants
a = 4.197 Å, b = 14.546 Å, c = 5.839 Å; α = 90.00°, β = 90.00°, γ = 90.00°
Cell volume
356.5 ų
Atoms in the conventional cell
24 (Ba 4, F 16, Zn 4)
Formula units Z
4
Pearson symbol
oC24 — orthorhombic, base-centred lattice, 24 atoms per conventional cell
Symmetry operations
8 per cell

Crystallographic sites

SiteElementWyckoffMultiplicityxyz
Ba1Ba4a40.00000.85240.4626
F2F4a40.00000.30170.2003
F3F4a40.00000.33260.7295
F4F4a40.00000.47150.3241
F5F4a40.00000.92270.0120
Zn6Zn4a40.00000.41320.0000

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 24 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

AB4C_oC24_36_a_4a_a-002: the stoichiometry comes first (A, B, C… are the elements in alphabetical order of their site labels), then the Pearson symbol oC24, then the space-group number 36, then the Wyckoff letters occupied by each element in turn (Ba: 4a; F: 4a; F: 4a; F: 4a; F: 4a; Zn: 4a). Two structures with the same label are the same arrangement with different cell parameters or coordinates.

Other compounds with this structure

BaCoF₄, BaCuF₄, BaFeF₄, BaMgF₄, BaMnF₄, BaNiF₄, BaWO₄, BiNbO₄, EuMgD₄, HfGeTe₄, LaTaO₄, NaAlH₄, NaOsO₄, SrMgD₄, SrMgF₄, ZrGeTe₄ <!--beginning with an

Source

Coordinates and cell from the AFLOW Encyclopedia of Crystallographic Prototypes, entry AB4C_oC24_36_a_4a_a-002 (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.

← Low Temperature BaBi₄Ti₄O₁₅ — BaBi₄O₁₅Ti₄  ·  Space group Cmc21 (17 prototypes)  ·  All prototypes  ·  α-Potassium Nitrate (KNO₃) Structure II: ABC3_oC80_36_2ab_2ab_2a5b-001 →