Research/Sitter/MAGNDATA / 1.78_Li2MnSiO4.mcif

Li₂MnSiO₄

MAGNDATA entry 1.78 · 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 ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 12 K (−261 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_a 2₁/c BNS 14.80
Point group	2/m1′
Parent space group	P 2₁/n No. 14
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 12.672 · b 10.9146 · c 10.146 Å · α 90° · β 90.99° · γ 90°
Transition	12 K (−261 °C)
Measured at	3 K
Magnetic ions	Mn
Largest moment component	3.91 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_a 2₁/c →

Atom sites · 10 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0.2525	0.1659	0.151	2.4	0	−3.91	4.623
Li1	Li	0.2525	0.1659	0.151
Si1	Si	0.1269	0.4137	0.1562
Li2	Li	0.0045	0.1601	0.15
Li3	Li	0.1172	0.077	0.3564
Mn2	Mn	0.1172	0.077	0.3564
O1	O	0.1295	0.4116	0.3185
O2	O	0.1258	0.5556	0.0979
O3	O	0.0196	0.3389	0.1062
O4	O	0.2324	0.3435	0.099

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. Avdeev et al. J. Solid State Chem. (2014) · doi:10.1016/j.jssc.2014.04.028

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.78_Li2MnSiO4.mcif from MAGNDATA · entry page

sha256 of this copy: ea232d8146b50e18c71bad081060cb74e6d5708213eb5269b571a9bd66222ea2
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.78_Li2MnSiO4.mcif.