Research/Sitter/MAGNDATA / 0.59_Cr2O3.mcif

Cr₂O₃

MAGNDATA entry 0.59 · 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 ≤ 343 K (70 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	R 3′c′ BNS 167.106
Point group	3′m′
Parent space group	R 3c No. 167
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.9607 · b 4.9607 · c 13.599 Å · α 90° · β 90° · γ 120°
Transition	343 K (70 °C)
Measured at	24 K
Magnetic ions	Cr
Largest moment component	2.48 μ_B
Method	SNP

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 3′c′ →

Atom sites · 2 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Cr1	Cr	0	0	0.3476	0	0	2.48	2.48
O1	O	0.3056	0	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

P.J. Brown et al. J. Phys.: Condens. Matter (2002) · doi:10.1088/0953-8984/14/8/323

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.59_Cr2O3.mcif from MAGNDATA · entry page

sha256 of this copy: ca2baf53cd7f284402bbab7e1609c9a7bf1e3066aaef5fcffc265a22e78464cf
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.59_Cr2O3.mcif.