Research/Sitter/MAGNDATA / 2.36_TbGe3.mcif

TbGe₃

MAGNDATA entry 2.36 · 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 ≤ 23 K (−250 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_c n m a BNS 62.452
Parent space group	C m c m No. 63
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 1/3] · [1/2 0 -1/3] 2k
Cell	a 8.094 · b 20.804 · c 11.7444 Å · α 90° · β 90° · γ 90°
Transition	23 K (−250 °C)
Measured at	8 K
Magnetic ions	Tb
Largest moment component	8.3 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_c n m a →

Atom sites · 8 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tb1_1	Tb	0.4167	0.0833	0	0	8.15	8.15
Tb1_2	Tb	0.5833	0.25	0	0	−8.3	8.3
Ge1_1	Ge	0.0382	0.0833
Ge1_2	Ge	0.9618	0.25
Ge2_1	Ge	0.6917	0.0833
Ge2_2	Ge	0.3083	0.25
Ge3_1	Ge	0.8095	0.0833
Ge3_2	Ge	0.1905	0.25

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

P Schobinger-Papamantellos et al. J. Phys.: Condens. Matter (2007) · doi:1088/0953-8984/19/23/236201

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 2.36_TbGe3.mcif from MAGNDATA · entry page

sha256 of this copy: f7f6780fe0c5fb9e39151d61b10cb3d5ad0a8001d4f3be4392c9a540a17d9659
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 2.36_TbGe3.mcif.