Research/Sitter/MAGNDATA / 0.760_FeOHSO4.mcif

FeHSO₅

MAGNDATA entry 0.760 · 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 ≤ 125 K (−148 °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 7.3798 · b 7.1078 · c 7.3797 Å · α 90° · β 120.5182° · γ 90°
Transition	125 K (−148 °C)
Measured at	3 K
Magnetic ions	Fe
Largest moment component	4.09 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 C 2′/c′ →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0.25	0.25	0	0	4.09	0	4.09
S1	S	0	0.1322	0.25
O1	O	0.6005	0.7631	0.1644
O2	O	0	0.6554	0.25
O3	O	0.3359	0.4856	0.587
H1	H	0	0.5102	0.25

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

Avdeev, M. et al. Inorg. Chem. (2021) · doi:10.1021/acs.inorgchem.1c02544

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.760_FeOHSO4.mcif from MAGNDATA · entry page

sha256 of this copy: e314eed58b974cfdec3bffeddea740a3734adeb558edc44663ce8624793193cb
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.760_FeOHSO4.mcif.

FeHSO5

Symmetry

Source

Original file

FeHSO₅