Research/Sitter/MAGNDATA / 1.555_Mn3B4.mcif

Mn₃B₄

MAGNDATA entry 1.555 · 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 ≤ 392 K (119 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_I n n m BNS 58.404
Parent space group	I m m m No. 71
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1] 1k
Cell	a 3.036 · b 12.842 · c 2.964 Å · α 90° · β 90° · γ 90°
Transition	392 K (119 °C)
Measured at	4.2 K
Magnetic ions	Mn
Largest moment component	2.92 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 P_I n n m →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0.5	0.5	0	0	0	−2.92	2.92
Mn2	Mn	0	0.184	0	0	0	0.44	0.44
B1	B	0	0.363	0
B2	B	0	0.436	0.5

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. Neov et al. phys. stat. sol. (b) (1972) · doi:10.1002/pssb.2220490221

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.555_Mn3B4.mcif from MAGNDATA · entry page

sha256 of this copy: 45631f7316afdd3fa78b6c391e1b87b95c2491ee41df588a76072645f321ae93
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.555_Mn3B4.mcif.