Research/Sitter/MAGNDATA / 0.122_Li2Mn(SO4)2.mcif

Li₂Mn(SO₄)₂

MAGNDATA entry 0.122 · source

altermagnet

No net magnetisation, yet the electron bands are spin-split: the up and down spin sublattices are related only by a rotation or mirror, never by a shift or inversion.

Spin group ²2/²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 6 K (−267 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P 2₁/c BNS 14.75
Point group	2/m
Parent space group	P 2₁/c No. 14
Spins	collinear · 1 nodal planes · net moment 0.04 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.9811 · b 8.314 · c 8.838 Å · α 90° · β 121.25° · γ 90°
Transition	6 K (−267 °C)
Measured at	1.85 K
Magnetic ions	Mn
Largest moment component	3.97 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 2₁/c →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	3.97	0.02	−1.03	4.5896
Li1	Li	0.0175	0.6299	0.1044
S1	S	0.3286	0.3026	0.2975
O1	O	0.1756	0.4145	0.1497
O2	O	0.1928	0.1391	0.2449
O3	O	0.2886	0.3533	0.4448
O4	O	0.6711	0.298	0.363

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

M. Reynaud et al. Inorganic Chemistry (2013) · doi:10.1021/ic401280e

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.122_Li2Mn(SO4)2.mcif from MAGNDATA · entry page

sha256 of this copy: 6b6cef62aa9bd436073c31bd4e66bbf48e99187d4794502980064d0cd6e7150d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.122_Li2Mn(SO4)2.mcif.