Research/Sitter/MAGNDATA / 1.1.45_LiCuVO4.mcif

LiCuVO₄

MAGNDATA entry 1.1.45 · source

incommensurate spiral

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 spiral: the spin direction rotates as you move along.

ordered ≤ 2.1 K (−271 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I2mb1′(0β0)000s
Point group	mm21′
Parent space group	I m m a No. 74
Repeats every	1.88 cells along b (not a whole number: that's what incommensurate means)
Propagation	[0 0.532 0] 1k
Cell	a 5.6477 · b 5.7864 · c 8.694 Å · α 90° · β 90° · γ 90°
Transition	2.1 K (−271 °C)
Measured at	1.6 K
Magnetic ions	Cu
Largest moment component	0.31 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 I2mb1′(0β0)000s →

Atom sites · 5 sites · CSV

site	element	x	y	z
Li1	Li	0.25	0.25	0.75
Cu1	Cu	0	0	0
V1	V	0	0.25	0.391
O1	O	0	0.0155	0.2742
O2	O	0.2359	0.25	−0.0012

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

B. Gibson et al. Physica B (2004) · doi:10.1016/j.physb.2004.03.064

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.45_LiCuVO4.mcif from MAGNDATA · entry page

sha256 of this copy: 672fa3310bb6161d24590979d7dda840abca035a2205c72134d051d90a13f015
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.45_LiCuVO4.mcif.