Research/Sitter/MAGNDATA / 1.618_CoO.mcif

CoO

MAGNDATA entry 1.618 · 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 ≤ 290 K (17 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_c 2/c BNS 15.90
Point group	2/m1′
Parent space group	F m 3 m No. 225
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 1/2] 1k
Cell	a 8.526 · b 8.526 · c 8.526 Å · α 90° · β 90° · γ 90°
Transition	290 K (17 °C)
Measured at	77 K
Magnetic ions	Co
Largest moment component	0.888 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_c 2/c →

Atom sites · 2 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0	0	0	−0.325	−0.325	0.888	0.9999
O1	O	0.25	0.25	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. van Laar et al. PHYSICAL REVIEW (1965) · doi:10.1103/PhysRev.138.A584

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.618_CoO.mcif from MAGNDATA · entry page

sha256 of this copy: a3ec7ad53981ab981a415413b09aa8836c2af30b16a26f4fd579ce40a287f6d7
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.618_CoO.mcif.