Research/Sitter/MAGNDATA / 0.441_Fe4Nb2O9.mcif

Fe₄Nb₂O₉

MAGNDATA entry 0.441 · 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 ≤ 97 K (−176 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C 2/c′ BNS 15.88
Parent space group	P 3 c 1 No. 165
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.2118 · b 5.2118 · c 14.2037 Å · α 90° · β 90° · γ 120°
Transition	97 K (−176 °C)
Measured at	5 K
Magnetic ions	Fe
Largest moment component	4.06 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 2/c′ →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Nb1	Nb	0	0	0.1427
Fe2	Fe	0.3333	0.6667	0.1933	−4.06	−1.85	0	3.5207
Fe1	Fe	0.3333	0.6667	0.986	−4.06	−1.85	0	3.5207
O1_1	O	0.6609	0.9763	0.0852
O1_2	O	0.0237	0.6846	0.0852
O1_3	O	0.3154	0.3391	0.0852
O2_1	O	0.2853	0	0.25
O2_2	O	0	0.2853	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

L. Ding et al. PHYSICAL REVIEW MATERIALS (2020) · doi:10.1103/PhysRevMaterials.4.084403

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.441_Fe4Nb2O9.mcif from MAGNDATA · entry page

sha256 of this copy: 9e7aacf4c7a851b9758462140d1f6b8c885d0fc2dbd72161c00839faac26094e
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.441_Fe4Nb2O9.mcif.