Research/Sitter/MAGNDATA / 0.462_MnAl2O4.mcif

MnAl₂O₄

MAGNDATA entry 0.462 · 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 ¹m¹3̄¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 42 K (−231 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	I 4₁′/a′ m′ d BNS 141.556
Parent space group	F d 3 m No. 227
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 8.2098 · b 8.2098 · c 8.2098 Å · α 90° · β 90° · γ 90°
Transition	42 K (−231 °C)
Measured at	1.6 K
Magnetic ions	Mn
Largest moment component	3.71 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 · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	0	0	3.71	3.71
Al1	Al	0.375	0.375	0.375
O1	O	0.1409	0.1409	0.1409

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

A. Krimmel et al. Physica B (2006) · doi:10.1016/j.physb.2006.01.413

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.462_MnAl2O4.mcif from MAGNDATA · entry page

sha256 of this copy: 2b06f089742f670d39ca82ecd87ed470260b1aaa99a90162424cf83feba39995
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.462_MnAl2O4.mcif.