Research/Sitter/MAGNDATA / 1.1.38_MnSb2O6.mcif

MnSb₂O₆

MAGNDATA entry 1.1.38 · 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	C21′(00γ)0s
Point group	21′
Parent space group	P 321 No. 150
Repeats every	5.49 cells along c (not a whole number: that's what incommensurate means)
Propagation	[0 0 0.182] 1k
Cell	a 8.802 · b 8.802 · c 4.721 Å · α 90° · β 90° · γ 120°
Transition	12.5 K (−261 °C)
Measured at	6 K
Magnetic ions	Mn
Largest moment component	4.12 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′(00γ)0s →

Atom sites · 12 sites · CSV

site	element	x	y	z
Mn1_1	Mn	0.638	0	0
Mn1_2	Mn	0	0.638	0
Sb1_1	Sb	0	0	0
Sb2_1	Sb	0.3333	0.6667	0.507
Sb3_1	Sb	0.3074	0	0.5
Sb3_2	Sb	0	0.3074	0.5
O1_1	O	0.1013	0.8905	0.7644
O1_2	O	−0.8905	−0.7892	0.7644
O2_1	O	0.4724	0.5898	0.73
O2_2	O	−0.5898	−0.1174	0.73
O3_1	O	0.2235	0.7736	0.2842
O3_2	O	−0.7736	−0.5501	0.2842

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

R.D. Johnson et al. Physical Review Letters (2013) · doi:10.1103/PhysRevLett.111.017202

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.38_MnSb2O6.mcif from MAGNDATA · entry page

sha256 of this copy: 3a40be562393a7171c03c497c08993fb3af807b95f884a60b4eda58959d42a76
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.38_MnSb2O6.mcif.