Research/Sitter/MAGNDATA / 0.90_Rb2Fe2O(AsO4)2.mcif

Rb₂Fe₂O(AsO₄)₂

MAGNDATA entry 0.90 · source

noncoplanar magnet

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

ordered ≤ 25 K (−248 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P n m a BNS 62.441
Point group	mmm
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 8.5331 · b 5.7892 · c 18.611 Å · α 90° · β 90° · γ 90°
Transition	25 K (−248 °C)
Measured at	4 K
Magnetic ions	Fe
Largest moment component	3.64 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 n m a →

Atom sites · 13 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Rb1	Rb	0.8888	0.25	0.8628
Rb2	Rb	0.0379	0.25	0.2679
Fe1	Fe	0.2844	0.25	0.4347	0	3.64	0	3.64
Fe2	Fe	0	0	0.5	−1.19	−2.88	0.68	3.1895
As1	As	0.8204	0.25	0.6426
As2	As	0.6758	0.25	0.444
O1	O	1.058	0.25	0.4375
O2	O	0.961	0.25	0.576
O3	O	0.7666	0.0108	0.4785
O4	O	0.4923	0.25	0.4744
O5	O	0.7043	0.0127	0.6338
O6	O	0.6843	0.25	0.3556
O7	O	0.913	0.25	0.7197

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

V.O. Garlea et al. PHYSICAL REVIEW B (2014) · doi:10.1103/PhysRevB.89.014426

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.90_Rb2Fe2O(AsO4)2.mcif from MAGNDATA · entry page

sha256 of this copy: a70eb82496c5a13a3440191e4410bb4e6d4fcc26c76977e757e2317e476413ba
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.90_Rb2Fe2O(AsO4)2.mcif.