Research/Sitter/MAGNDATA / 1.416_Tb2O2S.mcif

Tb₂O₂S

MAGNDATA entry 1.416 · 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 ≤ 6 K (−267 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_c 2/c BNS 15.90
Parent space group	P 3 m 1 No. 164
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 1/2 1/2] 1k
Cell	a 3.814 · b 6.606 · c 13.232 Å · α 90° · β 90° · γ 90°
Transition	6 K (−267 °C)
Measured at	4.2 K
Magnetic ions	Tb
Largest moment component	5.3 μ_B
Method	NSD

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 C_c 2/c →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tb1	Tb	0.3333	0.141	0	5.3	4.9	7.218
S1	S	0	0
O1	O	0.3333	0.315

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

Y. Abbas et al. Physica B+C (1977) · doi:10.1016/0378-4363(77)90251-0

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.416_Tb2O2S.mcif from MAGNDATA · entry page

sha256 of this copy: 6faa829345b1ce3a96bd71a53030633c731fa1bf1713441a70f1b248e54263b2
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.416_Tb2O2S.mcif.