Research/Sitter/MAGNDATA / 1.573_FeSO4.mcif

FeSO₄

MAGNDATA entry 1.573 · source

antiferromagnet

No net magnetisation, and up and down sublattices are related by a shift or by inversion, so the bands stay spin-degenerate: a conventional antiferromagnet.

Spin group ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 14 K (−259 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_c 2₁/c BNS 14.82
Parent space group	P b n m No. 62
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 9.59 · b 17.43 · c 6.804 Å · α 90° · β 90° · γ 90°
Transition	14 K (−259 °C)
Measured at	4.2 K
Magnetic ions	Fe
Largest moment component	4.11 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 P_c 2₁/c →

Atom sites · 10 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1_1	Fe	0	0	0	3.57	4.11	0	5.444
Fe1_2	Fe	0.25	0.25	0	−3.57	−4.11	0	5.444
S1_1	S	0.494	0.168	0.75
S1_2	S	0.744	0.082	0.25
O1_1	O	0.136	0.1925	0.75
O1_2	O	0.386	0.0575	0.25
O2_1	O	0.475	0.0725	0.75
O2_2	O	0.725	0.1775	0.25
O3_1	O	0.1565	0.063	0.071
O3_2	O	0.4065	0.187	0.929

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

A. Kirfel et al. phys. stat. sol. (a) (1977) · doi:10.1002/pssa.2210400210

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.573_FeSO4.mcif from MAGNDATA · entry page

sha256 of this copy: aa9196ea4e229578996b3496782355733bf2c92a88fbf2c5b8e04f6b0372365b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.573_FeSO4.mcif.