Research/Sitter/MAGNDATA / 0.1142_Li2Co2W2O9.mcif

Li₂Co₂W₂O₉

MAGNDATA entry 0.1142 · 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 ¹m²m²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 11.5 K (−262 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P b′ c′ n BNS 60.422
Point group	m′m′m
Parent space group	P b c n No. 60
Spins	collinear · 2 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 8.8042 · b 5.1125 · c 14.2562 Å · α 90° · β 90° · γ 90°
Transition	11.5 K (−262 °C)
Measured at	3 K
Magnetic ions	Co
Largest moment component	2.86 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 b′ c′ n →

Atom sites · 10 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
W1	W	0.52	0.9944	0.6434
Li1	Li	0.3316	0.4793	0.5035
Co2	Co	0.3316	0.4793	0.5035
Co1	Co	0.6656	0.4983	0.8092	0	2.86	0	2.86
Li2	Li	0.6656	0.4983	0.8092
O1	O	0	0.2239	0.25
O2	O	0.5058	0.6798	0.9121
O3	O	0.6423	0.8535	0.7426
O4	O	0.8414	0.6642	0.902
O5	O	0.3385	0.1493	0.9243

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

Conrad Quazza et al. Mater. Chem. Front. (2026) · doi:10.1039/d5qm00678c

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.1142_Li2Co2W2O9.mcif from MAGNDATA · entry page

sha256 of this copy: a380289b6aa99bb8960814d94e407782a5a66e15667e38219cb0c4bf20c21144
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.1142_Li2Co2W2O9.mcif.