Research/Sitter/MAGNDATA / 0.501_LiFe2F6.mcif

LiFe₂F₆

MAGNDATA entry 0.501 · source

d-wave 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. d-wave: the splitting changes sign twice around the Fermi surface (2 nodal planes).

Spin group ²4/¹m²m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 105 K (−168 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 4₂′/m n m′ BNS 136.499
Parent space group	P 4₂/m n m No. 136
Spins	collinear · 2 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.673 · b 4.673 · c 9.29 Å · α 90° · β 90° · γ 90°
Transition	105 K (−168 °C)
Measured at	4.2 K
Magnetic ions	Fe
Largest moment component	4.4 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 4₂′/m n m′ →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Li1	Li	0	0	0
Fe1	Fe	0	0	0.3333	0	0	4.4	4.4
F1	F	0.305	0.305	0
F2	F	0.305	0.305	0.333

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. Shachar et al. Physical Review B (1972) · doi:10.1103/PhysRevB.6.1968

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.501_LiFe2F6.mcif from MAGNDATA · entry page

sha256 of this copy: 7666aaa76997b0834813d46018d2d11efd6a179e504d8d11ad17288054866f8b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.501_LiFe2F6.mcif.