Research/Sitter/MAGNDATA / 0.128_FeSO4F.mcif

FeSO₄F

MAGNDATA entry 0.128 · source

altermagnet

No net magnetisation, yet the electron bands are spin-split: the up and down spin sublattices are related only by a rotation or mirror, never by a shift or inversion.

Spin group ²2/²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

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

Structure · 11 properties

Magnetic group	C 2′/c′ BNS 15.89
Point group	2′/m′
Parent space group	C 2/c No. 15
Spins	collinear · 1 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 7.365 · b 7.09 · c 7.368 Å · α 90° · β 119.77° · γ 90°
Transition	100 K (−173 °C)
Measured at	2 K
Magnetic ions	Fe
Largest moment component	4.32 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 C 2′/c′ →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
S1	S	0	0.647	0.25
Fe1	Fe	0.25	0.25	0.5	0	4.32	0	4.32
F1	F	0	0.167	0.25
O1	O	0.338	0.016	0.084
O2	O	0.412	0.264	0.346

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

B.C. Melot et al. Chem. Mater. (2011) · doi:10.1021/cm200465u

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.128_FeSO4F.mcif from MAGNDATA · entry page

sha256 of this copy: 7ae34aa4f663d4ec06e73ec1ad59402924a52dc68e5f8e417e622030dc0e8d2d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.128_FeSO4F.mcif.