Research/Sitter/MAGNDATA / 1.1.95_MnWO4.mcif

MnWO₄

MAGNDATA entry 1.1.95 · 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	P2 No. 3
Repeats every	2.19 cells along c (not a whole number: that's what incommensurate means)
Propagation	[-0.2152 0 0.4558] 1k
Cell	a 4.808 · b 11.484 · c 4.979 Å · α 90° · β 91.03° · γ 90°
Transition	12.5 K (−261 °C)
Measured at	10 K
Magnetic ions	Mn
Largest moment component	3.6 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_1	Mn	0.5	0.1597	0
Mn1_2	Mn	0.5	0.3436	0.5
W1_1	W	0	0.4097	0
W1_2	W	0	0.0888	0.5
O1_1	O	−0.252	−0.1899	−0.1566
O1_2	O	−0.2522	−0.3153	0.3692
O2_1	O	−0.2207	0.051	−0.1815
O2_2	O	−0.2009	−0.0512	0.2978

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.-H. Park et al. Physica B: Condensed Matter (2018) · doi:10.1016/j.physb.2017.11.034

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.95_MnWO4.mcif from MAGNDATA · entry page

sha256 of this copy: a43df30ceb36031d5b28113a45191054ec5ce5495bbc2c6feb7c5a9f5a2c65c3
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.95_MnWO4.mcif.