Research/Sitter/MAGNDATA / 0.634_NaMnBi.mcif

NaMnBi

MAGNDATA entry 0.634 · 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 4.53 · b 4.53 · c 7.676 Å · α 90° · β 90° · γ 90°
Transition	>293 K (20 °C)
Measured at	16 K
Magnetic ions	Mn
Largest moment component	4.58 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	4.58	4.58
Na1	Na	0.5	0.648
Bi1	Bi	0.5	0.234

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

⬇ 0.634_NaMnBi.mcif from MAGNDATA · entry page

sha256 of this copy: b96451c5e3d68d3b2330700f2b6b3f6b4acfbc659f37debf4f95f787559fec27
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.634_NaMnBi.mcif.