Research/Sitter/MAGNDATA / 1.838_LaMn2Au4.mcif

La₁Mn₂Au₄

MAGNDATA entry 1.838 · 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 ≤ 460 K (187 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_A m c m BNS 63.468
Point group	mmm1′
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 1 1] 1k
Cell	a 7.0578 · b 7.0578 · c 5.4026 Å · α 90° · β 90° · γ 90°
Transition	460 K (187 °C)
Measured at	1 K
Magnetic ions	Mn
Largest moment component	2.84 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 C_A m c m →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
La1	La	0	0	0
Mn1	Mn	0	0.5	0.25	2.84	2.84	0	4.0164
Au1_1	Au	0.3028	0.3028	0
Au1_2	Au	0.6972	0.3028	0

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

Stefanie Siebeneichler et al. Chem. Mater. (2024) · doi:10.1021/acs.chemmater.3c02170

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.838_LaMn2Au4.mcif from MAGNDATA · entry page

sha256 of this copy: e638ccd4424ddc71f35efe75c21d2c7ecdda66868501de25f1ca9650ea5a1965
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.838_LaMn2Au4.mcif.

La1Mn2Au4

Symmetry

Source

Original file

La₁Mn₂Au₄