Research/Sitter/MAGNDATA / 1.1.11_MnWO4.mcif

MnWO₄

MAGNDATA entry 1.1.11 · 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 ≤ 12.5 K (−261 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	X21′(α0γ)0s
Point group	21′
Parent space group	P 2/c No. 13
Repeats every	2.19 cells along c (not a whole number: that's what incommensurate means)
Propagation	[-0.214 0 0.457] 1k
Cell	a 4.8228 · b 11.5106 · c 5.0013 Å · α 90° · β 91.103° · γ 90°
Transition	12.5 K (−261 °C)
Measured at	9 K
Magnetic ions	Mn
Largest moment component	3.29 μ_B
Method	Phase AF2

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 X21′(α0γ)0s →

Atom sites · 8 sites · CSV

site	element	x	y	z
Mn1	Mn	0.5	0.3422	0.25
Mn2	Mn	0.5	0.1578	0.75
W1	W	0	0.0898	0.25
W2	W	0	−0.0898	−0.25
O1	O	0.2106	0.0512	0.9438
O2	O	0.2503	0.1872	0.3943
O3	O	−0.2106	−0.0512	−0.9438
O4	O	−0.2503	−0.1872	−0.3943

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

I. Urcelay-Olabarria et al. PHYSICAL REVIEW B (2013) · doi:10.1103/PhysRevB.87.014419

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.11_MnWO4.mcif from MAGNDATA · entry page

sha256 of this copy: 71831984c6949dbd4fa25d3a176e62c47ace39c62a56236fd2897ebdd07acf54
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.11_MnWO4.mcif.