Research/Sitter/MAGNDATA / 1.846_LaCu3Fe4O12.mcif

La₁Cu₃Fe₄O₁₂

MAGNDATA entry 1.846 · 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 ≤ 393 K (120 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	F_S m m m BNS 69.526
Point group	mmm1′
Parent space group	I m 3 No. 204
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 1/2] 1k
Cell	a 14.8283 · b 14.8283 · c 14.8283 Å · α 90° · β 90° · γ 90°
Transition	393 K (120 °C)
Measured at	50 K
Magnetic ions	Fe
Largest moment component	4.03 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 F_S m m m →

Atom sites · 15 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
La1_1	La	0	0	0
La1_2	La	0.25	0.25	0.25
Cu1_1	Cu	0	0.25	0.25
Cu1_2	Cu	0.25	0	0.25
Cu1_3	Cu	0.25	0.25	0
Cu1_4	Cu	0.25	0	0
Cu1_5	Cu	0	0.25	0
Cu1_6	Cu	0	0	0.25
Fe1	Fe	0.125	0.125	0.125	0	0	4.03	4.03
O1_1	O	0	0.1555	0.0858
O1_2	O	0.0858	0	0.1555
O1_3	O	0.1555	0.0858	0
O1_4	O	0.25	0.4056	0.3357
O1_5	O	0.3357	0.25	0.4056
O1_6	O	0.4056	0.3357	0.25

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.

Original file

⬇ 1.846_LaCu3Fe4O12.mcif from MAGNDATA · entry page

sha256 of this copy: 4389e7a7c52917088580a99c85eeeada68fb22a65b87a560860843da758f5b34
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.846_LaCu3Fe4O12.mcif.

La1Cu3Fe4O12

Symmetry

Original file

La₁Cu₃Fe₄O₁₂