Research/Sitter/MAGNDATA / 0.743_Ho3Al5O12.mcif

Ho₃Al₅O₁₂

MAGNDATA entry 0.743 · source

noncoplanar magnet

Spins pointing in three dimensions, not confined to a plane.

ordered ≤ 0.9 K (−272 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I a 3 d′ BNS 230.148
Point group	m3m′
Parent space group	I a 3 d No. 230
Spins	noncoplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 12 · b 12 · c 12 Å · α 90° · β 90° · γ 90°
Transition	0.85 K (−272 °C)
Measured at	0.45 K
Magnetic ions	Ho
Largest moment component	5.2 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 I a 3 d′ →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0.125	0	0.25	5.2	0	0	5.2
Al1	Al	0	0	0
Al2	Al	0.375	0	0.25
O1	O	0.1503	−0.0311	0.0513

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. Hammann et al. Acta Cryst. B (1969) · doi:10.1107/S0567740869004833

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.743_Ho3Al5O12.mcif from MAGNDATA · entry page

sha256 of this copy: 5c95f6723a0f4cc9b01dd42dfb3ca33a7663b757eece710bf68f3e8d0359376d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.743_Ho3Al5O12.mcif.