Research/Sitter/MAGNDATA / 1.346_TlMnF4.mcif

TlMnF₄

MAGNDATA entry 1.346 · 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 ≤ 4.2 K (−269 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_C 2/c BNS 13.74
Parent space group	I2/a No. 15
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 1 0] 1k
Cell	a 5.361 · b 5.397 · c 12.435 Å · α 90° · β 89.2° · γ 90°
Transition	4.2 K (−269 °C)
Measured at	1.34 K
Magnetic ions	Mn
Largest moment component	3.1 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 2/c →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0.25	0.75	0.25	0	3.1	0	3.1
F1	F	0.277	0.661	0.114
F2	F	0.471	0.066	0.214
Tl1	Tl	0.25	0.2668	0.5

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. Nu�ez et al. Z. anorg. allg. Chem. (1992) · doi:10.1002/zaac.19926090314

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.346_TlMnF4.mcif from MAGNDATA · entry page

sha256 of this copy: cf181170df73293c677f7fb4292544b9f45653ba65eef601cc9eeb1adf56db25
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.346_TlMnF4.mcif.