Research/Sitter/MAGNDATA / 0.3_Ca3LiOsO6.mcif

Ca₃LiOsO₆

MAGNDATA entry 0.3 · source

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.

Spin group ¹3̄²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 117.1 K (−156 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C 2′/c′ BNS 15.89
Point group	2′/m′
Parent space group	R 3c No. 167
Spins	collinear · 3 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 9.257 · b 9.257 · c 10.763 Å · α 90° · β 90° · γ 120°
Transition	117.1 K (−156 °C)
Measured at	4 K
Magnetic ions	Os
Largest moment component	2.2 μ_B
Method	NPD, MRXS

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 C 2′/c′ →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Os	Os	0	0	0	2.2	0	0	2.2
Ca1	Ca	0.646	0	0.25
Ca2	Ca	0	0.646	0.25
O1	O	0.0281	0.8438	0.3942
O2	O	−0.8438	−0.8157	0.3942
O3	O	0.8157	−0.0281	0.3942
Li	Li	0	0	0.25

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

Calder, S. et al. PHYSICAL REVIEW B (2012)

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.3_Ca3LiOsO6.mcif from MAGNDATA · entry page

sha256 of this copy: 09f4479ffa602d848a33f64eaf28a343846a387dd26212e5e5be86ee81a278ba
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.3_Ca3LiOsO6.mcif.