Research/Sitter/MAGNDATA / 1.368_Tb2Ni3Si5.mcif

Tb₂Ni₃Si₅

MAGNDATA entry 1.368 · 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 ≤ 13 K (−260 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_I b a m BNS 55.364
Parent space group	I b a m No. 72
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 1 0] 1k
Cell	a 9.5442 · b 11.1364 · c 5.6286 Å · α 90° · β 90° · γ 90°
Transition	13 K (−260 °C)
Measured at	2 K
Magnetic ions	Tb
Largest moment component	7.87 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_I b a m →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tb1	Tb	0.2682	0.3729	0	0	0	7.87	7.87
Ni1	Ni	0.1148	0.139	0
Ni2	Ni	0.5	0	0.25
Si1	Si	0.3467	0.1308	0
Si2	Si	0	0.2608	0.25
Si3	Si	0	0	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

A. Szytula et al. J. Phys.: Condens. Matter (1997) · doi:10.1088/0953-8984/9/31/017

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.368_Tb2Ni3Si5.mcif from MAGNDATA · entry page

sha256 of this copy: bde8b9cabbcae62b302434bfb9d2b60dca6661ed58756873d1e0d24065d9957d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.368_Tb2Ni3Si5.mcif.