Research/Sitter/MAGNDATA / 0.630_NaMnAs.mcif

NaMnAs

MAGNDATA entry 0.630 · 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 > 293 K (20 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 4′/n′ m′ m BNS 129.416
Parent space group	P 4/n m m No. 129
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.218 · b 4.218 · c 7.105 Å · α 90° · β 90° · γ 90°
Transition	>293 K (20 °C)
Measured at	293 K
Magnetic ions	Mn
Largest moment component	3.45 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 4′/n′ m′ m →

Atom sites · 3 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	0	3.45	3.45
Na1	Na	0.5	0.643
As1	As	0.5	0.211

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

W. Bronger et al. Z. anorg. allg. Chem. (1986) · doi:10.1002/zaac.19865390816

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.630_NaMnAs.mcif from MAGNDATA · entry page

sha256 of this copy: a000b7d27869375990cc4d4a5403068918930bfc72c754dddc0f9f39dd7f6e91
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.630_NaMnAs.mcif.