Research/Sitter/MAGNDATA / 1.39_LiFeGe2O6.mcif

LiFeGe₂O₆

MAGNDATA entry 1.39 · 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 ≤ 20 K (−253 °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/c No. 14
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 0] 1k
Cell	a 19.7272 · b 8.805 · c 5.3648 Å · α 90° · β 108.84° · γ 90°
Transition	20 K (−253 °C)
Measured at	5 K
Magnetic ions	Fe
Largest moment component	4.51 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)
Li1	Li	0.129	0.4894	0.7229
Fe1	Fe	0.1254	0.6507	0.2135	4.51	0.03	1.38	4.2692
Ge1	Ge	0.023	0.342	0.2818
Ge2	Ge	0.2764	0.8394	0.2303
O1	O	0.9292	0.3321	0.1761
O2	O	0.0573	0.5219	0.2863
O3	O	0.059	0.2907	0.6159
O4	O	0.1823	0.8315	0.1075
O5	O	0.3148	0.0038	0.3845
O6	O	0.3061	0.6891	0.4571

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

G.J. Redhammer et al. Journal of Solid State Chemistry (2009) · doi:10.1016/j.jssc.2009.06.013

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.39_LiFeGe2O6.mcif from MAGNDATA · entry page

sha256 of this copy: 65cd4931216cc083c8e5bf74b4bb14a8dd06e87f688ab053db6864488543e853
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.39_LiFeGe2O6.mcif.