Research/Sitter/MAGNDATA / 1.670_NpFeGa5.mcif

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Spin lattice of Np1F1Ga5Spin lattice of Np1F1Ga5

Np1F1Ga5

MAGNDATA entry 1.670 · 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 ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.
ordered ≤ 118 K (−155 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.
Structure · 11 properties
Magnetic groupCa m m a BNS 67.509
Point groupmmm1′
Parent space groupP 4/m m m No. 123
Spinscollinear · net moment 0 μB per cell
Propagation[1/2 1/2 0] 1k
Cella 8.514 · b 8.514 · c 6.761 Å · α 90° · β 90° · γ 90°
Transition118 K (−155 °C)
Measured at8.8 K
Magnetic ionsFe, Np
Largest moment component0.86 μB
MethodNSD

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 Ca m m a →
Atom sites · 5 sites · CSV
siteelementxyzmambmc|m| (μB)
Np1Np0000.86000.86
Fe1Fe000.5−0.24000.24
Ga1Ga0.250.250
Ga2_1Ga00.250.3011
Ga2_2Ga0.2500.3011

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

F. Honda et al. Physica B (2005) · doi:10.1016/j.physb.2005.01.304

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.670_NpFeGa5.mcif from MAGNDATA · entry page

sha256 of this copy: 3e3bf649cb87eb8cdfc7be6a07da42e8227dcfa62daee6d9cc27e9b33b9efcf3
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.670_NpFeGa5.mcif.