Research/Sitter/MAGNDATA / 1.1.139_MnSb2S4.mcif

MnSb₂S₄

MAGNDATA entry 1.1.139 · 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 ≤ 25.1 K (−248 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C21′(0,β,0)ss
Point group	21′
Parent space group	C 2/m No. 12
Repeats every	2.71 cells along b (not a whole number: that's what incommensurate means)
Propagation	[0 0.369 0] 1k
Cell	a 12.747 · b 3.799 · c 15.106 Å · α 90° · β 113.91° · γ 90°
Transition	25.1 K (−248 °C)
Measured at	1.5 K
Magnetic ions	Mn
Largest moment component	4.84586 μ_B
Method	NPD

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 C21′(0,β,0)ss →

Atom sites · 8 sites · CSV

site	element	x	z
Sb1	Sb	0.2352	0.3732
Sb2	Sb	0.357	0.1304
Mn1	Mn	0	0
Mn2	Mn	0	0.5
S1	S	0.8382	0.3251
S2	S	0.3437	−0.0376
S3	S	0.0059	0.1705
S4	S	0.3854	0.5403

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

P. Leone et al. Phys. Chem. Minerals (2008) · doi:10.1007/s00269-007-0213-3

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.139_MnSb2S4.mcif from MAGNDATA · entry page

sha256 of this copy: 9be5feecd036c06a7132cf96a04df47c72c1be4057b1d7b2f10f9c56ebeff0ef
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.139_MnSb2S4.mcif.