Research/Sitter/MAGNDATA / 1.241_FeCl2.mcif

FeCl₂

MAGNDATA entry 1.241 · 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 ¹3̄¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 24 K (−249 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	R_I 3 c BNS 167.108
Parent space group	R 3 m No. 166
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 3/2] 1k
Cell	a 3.603 · b 3.603 · c 35.072 Å · α 90° · β 90° · γ 120°
Transition	24 K (−249 °C)
Measured at	4.2 K
Magnetic ions	Fe
Largest moment component	4.5 μ_B
Method	NPD, 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 R_I 3 c →

Atom sites · 2 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0	0	0	0	0	4.5	4.5
Cl1	Cl	0	0	0.1272

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

M.K. Wilkinson et al. Phys. Rev. B (1959) · doi:10.1103/PhysRev.113.497

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.241_FeCl2.mcif from MAGNDATA · entry page

sha256 of this copy: af07e7d8e3d8ae8f6f4c4f39f279eb3a295da8f52bb84e6984874be830838c76
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.241_FeCl2.mcif.