Research/Sitter/MAGNDATA / 1.156_LaMn3Cr4O12.mcif

LaMn₃Cr₄O₁₂

MAGNDATA entry 1.156 · 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 ¹m¹3̄ × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 50 K (−223 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	R_I 3 BNS 146.12
Point group	31′
Parent space group	I m 3 No. 204
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 1 1] 1k
Cell	a 7.39805 · b 7.39805 · c 7.39805 Å · α 90° · β 90° · γ 90°
Transition	50 K (−223 °C)
Measured at	2 K
Magnetic ions	Cr, Mn
Largest moment component	1.96 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 R_I 3 →

Atom sites · 8 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	0.5	1.96	1.96	1.96	3.3948
Cr1_1	Cr	0.25	0.25	0.25	1.67	1.67	1.67	2.8925
Cr1_2	Cr	0.75	0.75	0.25	1.67	1.67	1.67	2.8925
O1_1	O	0	0.3104	0.1771
O1_2	O	0	0.6896	0.1771
O1_3	O	0	0.3104	0.8229
O1_4	O	0	0.6896	0.8229

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

X. Wang et al. PHYSICAL REVIEW LETTERS (2015) · doi:10.1103/PhysRevLett.115.087601

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.156_LaMn3Cr4O12.mcif from MAGNDATA · entry page

sha256 of this copy: a309585b87364e7913470b7afe41da45ac14cd8e944a873ea2177dcb2e0d9c76
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.156_LaMn3Cr4O12.mcif.