Research/Sitter/MAGNDATA / 1.470_UCr2Si2.mcif

UCr₂Si₂

MAGNDATA entry 1.470 · 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 ≤ 30 K (−243 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_c 2/c BNS 15.90
Parent space group	C 2/m No. 12
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 0 1/2] 1k
Cell	a 5.54 · b 5.468 · c 11.66 Å · α 90° · β 116.24° · γ 90°
Transition	30 K (−243 °C)
Measured at	2 K
Magnetic ions	Cr, U
Largest moment component	0.74 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 C_c 2/c →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
U1	U	0	0	0	0.33	0	0.74	0.6637
Cr1	Cr	0	0.219	0.25
Si1	Si	0.4	0	0.387

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

P. Lemoine et al. Inorg. Chem. (2018) · doi:10.1021/acs.inorgchem.7b02901

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.470_UCr2Si2.mcif from MAGNDATA · entry page

sha256 of this copy: c08cd818bc64e4bde5521f964180ced0e97adb77722e26bebfb508866c98aaca
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.470_UCr2Si2.mcif.