Research/Sitter/MAGNDATA / 0.221_Fe2SiO4.mcif

Fe₂SiO₄

MAGNDATA entry 0.221 · source

noncoplanar magnet

Spins pointing in three dimensions, not confined to a plane.

ordered ≤ 65.3 K (−208 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P n m a BNS 62.441
Parent space group	P n m a No. 62
Spins	noncoplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.4788 · b 6.0873 · c 4.8195 Å · α 90° · β 90° · γ 90°
Transition	65.3 K (−208 °C)
Measured at	10 K
Magnetic ions	Fe
Largest moment component	4.4 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 P n m a →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Fe1	Fe	0	0	0	1.37	3.4	2.51	4.4426
Fe2	Fe	0.2803	0.25	0.986	0	4.4	0	4.4
Si1	Si	0.0977	0.25	0.4312
O1	O	0.0922	0.25	0.7681
O2	O	0.4536	0.25	0.2089
O3	O	0.1656	0.0364	0.289

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

W. Lottermoser et al. Journal of Magnetism and Magnetic Materials (1986) · doi:10.1016/0304-8853(86)90355-0

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.221_Fe2SiO4.mcif from MAGNDATA · entry page

sha256 of this copy: 13dae76b2af54e7c53b9faeb968a1dab8868eea687b7d91897ec8aa80d082486
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.221_Fe2SiO4.mcif.