Research/Sitter/MAGNDATA / 0.169_U3As4.mcif

U₃As₄

MAGNDATA entry 0.169 · source

noncoplanar ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 200 K (−73 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	R 3c′ BNS 161.71
Point group	3m′
Parent space group	I 43d No. 220
Spins	noncoplanar · net moment 20.092 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 8.497 · b 8.497 · c 8.497 Å · α 90° · β 90° · γ 90°
Transition	200 K (−73 °C)
Magnetic ions	U
Largest moment component	1.7 μ_B
Method	NSD and NPSD

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 R 3c′ →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
U1	U	0.375	0	0.25	1.7	0.6	0.6	1.9
As1_1	As	0.083	0.083	0.083
As1_2	As	0.417	0.917	0.583

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. Burlet et al. Solid State Communications (1981) · doi:10.1016/0038-1098(81)90449-X

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.169_U3As4.mcif from MAGNDATA · entry page

sha256 of this copy: 76e56ce2e89b28e98474fcdedc5c48905ee254501a348d8978046712897fdd4e
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.169_U3As4.mcif.