Research/Sitter/MAGNDATA / 0.455_RbFeO2.mcif

RbFeO₂

MAGNDATA entry 0.455 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 737 K (464 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P b′ c′ a′ BNS 61.437
Parent space group	P b c a No. 61
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.7197 · b 11.5141 · c 16.3457 Å · α 90° · β 90° · γ 90°
Transition	737 K (464 °C)
Measured at	300 K
Magnetic ions	Fe
Largest moment component	3.83 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 b′ c′ a′ →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Rb1	Rb	0.749	0.5105	0.4371
Rb2	Rb	0.3009	0.239	0.6866
Fe1	Fe	0.7554	0.0056	0.19	0	0	3.83	3.83
Fe2	Fe	0.7842	0.2396	0.5631	0	0	−3.83	3.83
O1	O	0.4431	0.9825	0.2208
O2	O	0.8285	0.9022	0.1058
O3	O	0.8028	0.1551	0.1484
O4	O	0.5766	0.2836	0.4805

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

D. Sheptyakov et al. J. Phys.: Condens. Matter (2010) · doi:10.1088/0953-8984/22/42/426001

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.455_RbFeO2.mcif from MAGNDATA · entry page

sha256 of this copy: 3a4400b54ed9ff16db20f05bed48c351499bac2660eb2746825057905ef13303
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.455_RbFeO2.mcif.