Research/Sitter/MAGNDATA / 1.799_MnO.mcif

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Spin lattice of Mn1O1Spin lattice of Mn1O1

Mn1O1

MAGNDATA entry 1.799 · 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 ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.
ordered ≤ 115 K (−158 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.
Structure · 11 properties
Magnetic groupCc 2/c BNS 15.90
Point group2/m1′
Parent space groupF m 3 m No. 225
Spinscollinear · net moment 0 μB per cell
Propagation[1/2 1/2 1/2] 1k
Cella 5.45706 · b 3.15147 · c 6.2324 Å · α 90° · β 125.6677° · γ 90°
Transition115 K (−158 °C)
Measured at1.8 K
Magnetic ionsMn
Largest moment component4.61 μB
MethodThe fit in the alternative MSG C_c2/m gives the same goodness-of-fit and the same magnetic moment for MnO, where the allowed spin direction is only my, which is perpendicular to k1, similar to mx. This contrasts with the NiO structure (entry #1.800), where the structure must be C_c2/c.

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 Cc 2/c →
Atom sites · 2 sites · CSV
siteelementxyzmambmc|m| (μB)
Mn1Mn0004.61004.61
O1O00.50.75

Moment components are along the crystal axes a, b, c (μB), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

V. Pomjakushin et al. Acta Cryst. B (2024) · doi:10.1107/S205252062400756X

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.799_MnO.mcif from MAGNDATA · entry page

sha256 of this copy: 0c5760894891183d92d13455a9c4492fa14699fa0c3a862fb7ad9bb7e69dc98d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.799_MnO.mcif.