Research/Sitter/MAGNDATA / 1.347_CuFeO2.mcif

CuFeO₂

MAGNDATA entry 1.347 · 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 ≤ 10 K (−263 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_a 2/c BNS 15.91
Parent space group	R 3 m No. 166
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/4 -1/2 3/2] 1k
Cell	a 5.2949 · b 6.114 · c 34.64 Å · α 90° · β 90° · γ 90°
Transition	10 K (−263 °C)
Measured at	4.6 K
Magnetic ions	Fe
Largest moment component	4 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 C_a 2/c →

Atom sites · 3 sites · CSV

site	element	z	m_a	m_b	m_c	\|m\| (μ_B)
Cu1	Cu	0.25
Fe1	Fe	0	0	0	−4	4
O1	O	0.303

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

S. Mitsuda et al. J. Phys. Soc. Japan (1991) · doi:10.1143/JPSJ.60.1885

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.347_CuFeO2.mcif from MAGNDATA · entry page

sha256 of this copy: 6f6d80f93bffa5c81661ff1606585369a933dd576254149c3b367e79b939071f
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.347_CuFeO2.mcif.