Research/Sitter/MAGNDATA / 1.521_FeSO4.mcif

FeSO₄

MAGNDATA entry 1.521 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 21 K (−252 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_C b c n BNS 60.431
Parent space group	C m c m No. 63
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 0 0] 1k
Cell	a 5.252 · b 7.978 · c 6.59 Å · α 90° · β 90° · γ 90°
Transition	21 K (−252 °C)
Measured at	4.2 K
Magnetic ions	Fe
Largest moment component	4.1 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 b c n →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0	0	0	0	4.1	0	4.1
S1	S	0	0.3479	0.25
O1	O	0	0.2481	0.0644
O2	O	0.2036	0.4539	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

B. C. Frazer et al. Physical Review (1962) · doi:10.1103/PhysRev.125.1283

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.521_FeSO4.mcif from MAGNDATA · entry page

sha256 of this copy: 422e7aee175c83acf412badbe7691905622463a2f2f0a01e6dc9bfa1280dc5d8
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.521_FeSO4.mcif.