Research/Sitter/MAGNDATA / 1.200_U2Ni2Sn.mcif

U₂Ni₂Sn

MAGNDATA entry 1.200 · 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 ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 25 K (−248 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_c m c m BNS 63.466
Parent space group	P 4/m b m No. 127
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 7.214 · b 7.214 · c 7.414 Å · α 90° · β 90° · γ 90°
Transition	25 K (−248 °C)
Measured at	1.5 K
Magnetic ions	U
Largest moment component	1 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 m c m →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
U1_1	U	0.1739	0.6739	0.25	−1	−1	0	1.4142
U1_2	U	0.3261	0.1739	0.25	1	1	0	1.4142
Ni1_1	Ni	0.375	0.875	0
Ni1_2	Ni	0.125	0.375	0
Sn1	Sn	0	0	0

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

F. Bouree et al. Journal of Magnetism and Magnetic Materials (1994) · doi:10.1016/0304-8853(94)90052-3

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.200_U2Ni2Sn.mcif from MAGNDATA · entry page

sha256 of this copy: f5459936fa5a0977f936c5d7bef9ff61978792befd7445912d2f14e55f0c7df0
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.200_U2Ni2Sn.mcif.