Research/Sitter/MAGNDATA / 1.1.46_ScMn6Ge6.mcif

ScMn₆Ge₆

MAGNDATA entry 1.1.46 · 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 ≤ 100 K (−173 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P6221′_c(00γ)h00s
Point group	6221′
Parent space group	P 6/m m m No. 191
Repeats every	1.23 cells along c (not a whole number: that's what incommensurate means)
Propagation	[0 0 0.81] 1k
Cell	a 5.1684 · b 5.1684 · c 16.794 Å · α 90° · β 90° · γ 120°
Transition	100 K (−173 °C)
Measured at	1.5 K
Magnetic ions	Mn
Largest moment component	2.09 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 P6221′_c(00γ)h00s →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sc1	Sc	0	0	0
Mn1	Mn	0.5	0	0.1229	0	0	2.09	2.09
Ge1	Ge	0.3333	0.6667	0.25
Ge2	Ge	0.3333	0.6667	0
Ge3	Ge	0	0	0.1693

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. Schobinger-Papamantellos et al. Journal of Magnetism and Magnetic Materials (2014) · doi:10.1016/j.jmmm.2014.06.052

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.46_ScMn6Ge6.mcif from MAGNDATA · entry page

sha256 of this copy: 75310334b7f68e60ba6fc02466664df0baf20b979eddcfb8c82cf2fc35df1c37
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.46_ScMn6Ge6.mcif.