Research/Sitter/MAGNDATA / 0.37_U3Al2Si3.mcif

U₃Al₂Si₃

MAGNDATA entry 0.37 · source

noncollinear ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 35 K (−238 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C 2′ BNS 5.15
Point group	2′
Parent space group	I 4 No. 79
Spins	coplanar · net moment 8.606 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 7.6292 · b 7.6292 · c 10.8502 Å · α 90° · β 90° · γ 90°
Transition	35 K (−238 °C)
Measured at	6 K
Magnetic ions	U
Largest moment component	1.03 μ_B
Method	PNSD, NSD

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′ →

Atom sites · 10 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
U1	U	0	0	0.25	0.16	0	0	0.16
U2	U	0	0	0.7488	0.16	0	0	0.16
U3_1	U	0.1593	0.3407	0.0225	1.03	0.78	0	1.292
U3_2	U	0.6593	0.1593	0.0225	0.96	−0.86	0	1.2889
Si1	Si	0	0	0
Si2	Si	0	0	0.5
Si3_1	Si	0.3536	0.148	0.2089
Si3_2	Si	0.852	0.3536	0.2089
Al2_1	Al	0.141	0.3613	0.3295
Al2_2	Al	0.6387	0.141	0.3295

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

A.G. Gukasov et al. J. Phys.: Condens. Matter (2002) · doi:10.1088/0953-8984/14/38/308

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.37_U3Al2Si3.mcif from MAGNDATA · entry page

sha256 of this copy: 2070451071e84c1161ff85c0ab49b76d55180067ad9fa21c6723d0d8bd14b765
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.37_U3Al2Si3.mcif.