Research/Sitter/MAGNDATA / 1.356_Ho3Ge4.mcif

Ho₃Ge₄

MAGNDATA entry 1.356 · 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 ≤ 12 K (−261 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_B n n a BNS 52.318
Parent space group	C m c m No. 63
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 1 0] 1k
Cell	a 4.0049 · b 10.541 · c 14.11 Å · α 90° · β 90° · γ 90°
Transition	12 K (−261 °C)
Measured at	10.7 K
Magnetic ions	Ho
Largest moment component	5.73 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_B n n a →

Atom sites · 5 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0.3305	0.098	0	0	−5.73	5.73
Ho2	Ho	0.053	0.25
Ge1	Ge	0.375	0.889
Ge2	Ge	0.772	0.25
Ge3	Ge	0	0

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

O. Zaharko et al. J. Phys.: Condens. Matter (1998) · doi:10.1088/0953-8984/10/29/015

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.356_Ho3Ge4.mcif from MAGNDATA · entry page

sha256 of this copy: 5028d9f6ad3164983d42b06e2f29d14fc6a3b18f79911dc8807ae38c9d86b77b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.356_Ho3Ge4.mcif.