Research/Sitter/MAGNDATA / 1.332_Li0.22Na0.78FeGe2O6.mcif

Li_0.22Na_0.78FeGe₂O₆

MAGNDATA entry 1.332 · 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 ≤ 14 K (−259 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_C 2₁/c BNS 14.84
Parent space group	C 2/c No. 15
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 1 0] 1k
Cell	a 10.002 · b 8.8641 · c 5.5212 Å · α 90° · β 108.286° · γ 90°
Transition	14 K (−259 °C)
Measured at	4 K
Magnetic ions	Fe
Largest moment component	3.63 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_C 2₁/c →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Na1	Na	0	0.3019	0.25
Li1	Li	0	0.3019	0.25
Fe1	Fe	0	0.9044	0.25	3.63	0	0.05	3.6146
Ge1	Ge	0.289	0.0937	0.2342
O1	O	0.1058	0.0818	0.1334
O2	O	0.3572	0.2741	0.2967
O3	O	0.3622	0.0004	0.0303

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. Phys. Chem. Minerals (2017) · doi:10.1007/s00269-017-0892-3

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.332_Li0.22Na0.78FeGe2O6.mcif from MAGNDATA · entry page

sha256 of this copy: 31f9e2c56a3b5b31a1fa1f1a6cc35fff0bcb492ea4292a6be31f4e2e520a4659
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.332_Li0.22Na0.78FeGe2O6.mcif.