Research/Sitter/MAGNDATA / 1.848_La2Ba2Mn4O11.mcif

La₂Ba₂Mn₄O₁₁

MAGNDATA entry 1.848 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 185 K (−88 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	I_c m m m BNS 71.538
Point group	mmm1′
Parent space group	C m m m No. 65
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 0 1/2] 1k
Cell	a 15.4307 · b 8.18764 · c 7.69144 Å · α 90° · β 90° · γ 90°
Transition	185 K (−88 °C)
Measured at	1.7 K
Magnetic ions	Mn
Largest moment component	3.43 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 I_c m m m →

Atom sites · 9 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
La	La	0	0.2666	0.25
Ba	Ba	0.25	0.25	0.25
Mn1	Mn	0.1184	0	0	0	3.43	0	3.43
Mn2	Mn	0.3734	0	0	0	3.05	0	3.05
O1	O	0.1075	0.2304	0
O2	O	0.2517	0	0
O3	O	0.0959	0	0.25
O4	O	0.3827	0	0.25
O5	O	0.5	0	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

V. Caignaert et al. Chem. Mater. (1999) · doi:10.1021/cm980469h

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.848_La2Ba2Mn4O11.mcif from MAGNDATA · entry page

sha256 of this copy: e933401b2d03f2ef080b2361076cce4896d698d8e9d011a8186504350bd5d8b0
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.848_La2Ba2Mn4O11.mcif.