Research/Sitter/MAGNDATA / 2.22_FeTa2O6.mcif

FeTa₂O₆

MAGNDATA entry 2.22 · source

noncollinear antiferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

ordered ≤ 8.5 K (−265 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I_c 4₁/a BNS 88.86
Point group	4/m1′
Parent space group	P 4₂/m n m No. 136
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] · [0 1/2 1/2] 2k
Cell	a 9.498 · b 9.498 · c 18.384 Å · α 90° · β 90° · γ 90°
Transition	8.5 K (−265 °C)
Measured at	4.2 K
Magnetic ions	Fe
Largest moment component	2.61 μ_B
Method	NPD and Mossbauer effect

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 I_c 4₁/a →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0	0	0	−2.61	2.61	0	3.6911
Ta1	Ta	0	0	0.1665
O1	O	0.1535	0.1535	0
O2_1	O	0.1485	0.1485	0.161
O2_2	O	0.8515	0.8515	0.161

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

Eicher, S.M. et al. Journal of Solid State Chemistry (1986) · doi:10.1016/0022-4596(86)90235-5

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 2.22_FeTa2O6.mcif from MAGNDATA · entry page

sha256 of this copy: 29b80592bb304450fb92b0b71c3f90198625a896baad2e74c3f30fd4b490c7b3
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 2.22_FeTa2O6.mcif.