Research/Sitter/MAGNDATA / 0.126_NpCo2.mcif

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Spin lattice of Np1Co2Spin lattice of Np1Co2

Np1Co2

MAGNDATA entry 0.126 · 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 ¹m¹3̄¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.
ordered ≤ 15 K (−258 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.
Structure · 10 properties
Magnetic groupI 41′/a′ m′ d BNS 141.556
Point group4′/m′m′m
Parent space groupF d 3 m No. 227
Spinscollinear · net moment 0 μB per cell
Propagation[0 0 0] 1k
Cella 7.043 · b 7.043 · c 7.043 Å · α 90° · β 90° · γ 90°
Transition15 K (−258 °C)
Magnetic ionsNp
Largest moment component0.5 μB
MethodNPD

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 I 41′/a′ m′ d →
Atom sites · 2 sites · CSV
siteelementxyzmambmc|m| (μB)
Co1Co0.3750.3750.375
Np1Np000000.50.5

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

Aldred, A.T. et al. Phys. Rev. B (1975) · doi:10.1103/PhysRevB.11.530

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.126_NpCo2.mcif from MAGNDATA · entry page

sha256 of this copy: 5c8b41dc5549b641ea92754c903de9be299e716b55abcdad68880f2e4e292fca
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.126_NpCo2.mcif.