Research/Sitter/MAGNDATA / 1.653_FeWO4.mcif

FeWO₄

MAGNDATA entry 1.653 · 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 ≤ 66 K (−207 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_a 2/c BNS 13.70
Point group	2/m1′
Parent space group	P 2/c No. 13
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 0] 1k
Cell	a 9.46 · b 5.703 · c 4.952 Å · α 90° · β 90° · γ 90°
Transition	66 K (−207 °C)
Measured at	4.2 K
Magnetic ions	Fe
Largest moment component	1.92 μ_B
Method	NSD

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_a 2/c →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0.25	0.6744	0.25	−1.92	0	1.06	2.1932
W1	W	0	0.1799	0.25
O1	O	0.1064	0.1061	0.5652
O2	O	0.1269	0.3764	0.1059

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

D. Ulku et al. Zeitschrift für Kristallographie (1967) · doi:10.1524/zkri.1967.124.16.192

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.653_FeWO4.mcif from MAGNDATA · entry page

sha256 of this copy: 77cc6d0c94b584a2cf5ea71d80dcffd6eb286c29c8c0240651ac1f99e11a8f0b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.653_FeWO4.mcif.