Research/Sitter/MAGNDATA / 0.889_Mn0.8Co2.2O4.mcif

Mn_0.8Co_2.2O₄

MAGNDATA entry 0.889 · source

s-wave ferrimagnet

Opposite moments of different size leave a net magnetisation.

Spin group ¹m¹3̄¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

Structure · 10 properties

Magnetic group	I 4₁/a m′ d′ BNS 141.557
Point group	4/mm′m′
Parent space group	F d 3 m No. 227
Spins	collinear · net moment 76 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 8.235 · b 8.235 · c 8.235 Å · α 90° · β 90° · γ 90°
Measured at	4.2 K
Magnetic ions	Co, Mn
Largest moment component	3.12 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 I 4₁/a m′ d′ →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	3.12	0	0	3.12
Co1	Co	0	0	0	3.12	0	0	3.12
Co2	Co	0.375	0.375	0.375	−2.98	0	0	2.98
O1	O	0.238	0.238	0.238

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. B. Boucher et al. J. Physique (1970) · doi:10.1051/jphys:01970003101011300

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.889_Mn0.8Co2.2O4.mcif from MAGNDATA · entry page

sha256 of this copy: 4035470a329640b5173886f475edc16b8b6d65497706d5ce82e0e2b86e8b5a77
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.889_Mn0.8Co2.2O4.mcif.