Research/Sitter/MAGNDATA / 1.508_Mn2AlB2.mcif

Mn₂AlB₂

MAGNDATA entry 1.508 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 390 K (117 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_c m c m BNS 63.466
Parent space group	C m m m No. 65
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 2.9166 · b 11.048 · c 5.786 Å · α 90° · β 90° · γ 90°
Transition	390 K (117 °C)
Measured at	1.6 K
Magnetic ions	Mn
Largest moment component	0.71 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 C_c m c m →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Al1	Al	0.5	0	0.25
B1	B	0.5	0.2029	0.25
Mn1	Mn	0	0.8547	0	0	0.71	0	0.71

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

D. Potashnikov et al. Journal of Magnetism and Magnetic Materials (2019) · doi:10.1016/j.jmmm.2018.09.078

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.508_Mn2AlB2.mcif from MAGNDATA · entry page

sha256 of this copy: 54d92180dc5eccf971e95442713c86d2c3e6ff16ec75afe8757a3c331b2502bd
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.508_Mn2AlB2.mcif.