Research/Sitter/MAGNDATA / 1.1.128_LiFe(WO4)2.mcif

LiFe(WO₄)₂

MAGNDATA entry 1.1.128 · source

incommensurate spin-density wave

Incommensurate: the magnetic pattern repeats every so many cells, but not a whole number of them, so it never lines up with the crystal lattice. Here it's a spin-density wave: the size of the spin swells and shrinks as you move along.

ordered ≤ 22.2 K (−251 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C2/c1′(α,0,γ)0ss
Point group	2/m1′
Parent space group	C 2/c No. 15
Repeats every	1.12 cells along a (not a whole number: that's what incommensurate means)
Propagation	[0.89 0 0.32] 1k
Cell	a 9.2648 · b 11.3858 · c 4.8918 Å · α 90° · β 90.4° · γ 90°
Transition	22.2 K (−251 °C)
Measured at	20 K
Magnetic ions	Fe
Largest moment component	2.62 μ_B
Method	NSD

Symmetry

Stereogram of the magnetic point group: each operation applied to one direction. Filled = upper hemisphere, ring = lower; red operations include time reversal. Lines are mirrors; polygons are 2/3/4/6-fold axes; the centre ring is inversion.

Every structure in C2/c1′(α,0,γ)0ss →

Atom sites · 7 sites · CSV

site	element	x	y	z
Fe1	Fe	0	0.3347	0.25
W1	W	0.747	0.5914	0.2467
Li1	Li	0	0.846	0.25
O1	O	0.8638	0.5598	−0.0755
O2	O	0.8801	0.6822	0.4115
O3	O	0.3562	0.5497	−0.0563
O4	O	0.3775	0.6951	0.3933

Incommensurate: the moments are modulated; the picture evaluates each atom's Fourier series at its own phase.

Moment components are along the crystal axes a, b, c (μ_B), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

S. Biesenkamp et al. PHYSICAL REVIEW B (2021) · doi:10.1103/PhysRevB.103.134412

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.128_LiFe(WO4)2.mcif from MAGNDATA · entry page

sha256 of this copy: ba45ca73d052602df8d1702b443db5cd2f268b9131d98ce5924333a7605e9f7b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.128_LiFe(WO4)2.mcif.