Research/Sitter/MAGNDATA / 0.485_U2N2Se.mcif

U₂N₂Se

MAGNDATA entry 0.485 · 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 ¹3̄¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 245 K (−28 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 3′ m′ 1 BNS 164.88
Parent space group	P 3 m 1 No. 164
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 3.863 · b 3.863 · c 6.867 Å · α 90° · β 90° · γ 120°
Transition	245 K (−28 °C)
Measured at	4 K
Magnetic ions	U
Largest moment component	2.3 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 3′ m′ 1 →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
U1	U	0.3333	0.6667	0.3054	0	0	2.3	2.3
N1	N	0.3333	0.6667	0.6306
Se1	Se	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

J. Leciejewicz et al. J. Phys. C: Solid State Phys. (1975) · doi:10.1088/0022-3719/8/11/021

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.485_U2N2Se.mcif from MAGNDATA · entry page

sha256 of this copy: 6a50e40edf6b857198b23b17643d750d20d0979b963a95cbb6f678be83489c52
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.485_U2N2Se.mcif.