Research/Sitter/MAGNDATA / 1.534_HoC2.mcif

HoC₂

MAGNDATA entry 1.534 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 26 K (−247 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_a m m a BNS 51.298
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[3/4 0 0] 1k
Cell	a 14.532 · b 3.633 · c 6.132 Å · α 90° · β 90° · γ 90°
Transition	26 K (−247 °C)
Measured at	5 K
Magnetic ions	Ho
Largest moment component	9.75 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 m m a →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1_1	Ho	0	0	0	0	0	9.75	9.75
Ho1_2	Ho	0.125	0.5	0.5	0	0	−6.89	6.89
Ho1_3	Ho	0.25	0	0
C1_1	C	0	0	0.3957
C1_2	C	0.125	0.5	0.8957
C1_3	C	0.25	0	0.3957

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

M. Atoji et al. J. Chem. Phys. (1967) · doi:10.1063/1.1840950

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.534_HoC2.mcif from MAGNDATA · entry page

sha256 of this copy: 97f82e84708e9a9790b9ee56b252b70c4f5f56ee0558043c783493c28aef95ac
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.534_HoC2.mcif.