Research/Sitter/MAGNDATA / 1.213_Ho2O2Se.mcif

Ho₂O₂Se

MAGNDATA entry 1.213 · 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 ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 4 K (−269 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_A 2/c BNS 13.73
Parent space group	P 3m 1 No. 164
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 3.807 · b 6.5939 · c 6.766 Å · α 90° · β 90° · γ 90°
Transition	4 K (−269 °C)
Measured at	1.5 K
Magnetic ions	Ho
Largest moment component	9.3 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_A 2/c →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0.5	0.8333	0.287	0	0	9.3	9.3
Se1	Se	0	0	0
O1	O	0.5	0.8333	0.619

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

G. Quezel et al. Solid State Communications (1972) · doi:10.1016/0038-1098(72)90182-2

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.213_Ho2O2Se.mcif from MAGNDATA · entry page

sha256 of this copy: 41f8c0450d80fd6ab7aca42071d26ade0264a6f24130950099064f282968bbcb
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.213_Ho2O2Se.mcif.