Research/Sitter/MAGNDATA / 2.90_Mn3O4.mcif

Mn₃O₄

MAGNDATA entry 2.90 · source

noncollinear ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 33 K (−240 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P b′ c′ n BNS 60.422
Point group	m′m′m
Parent space group	I 4₁/a m d No. 141
Spins	coplanar · net moment 15.12 μ_B per cell
Propagation	[0 0 0] · [0 1/2 0] 2k
Cell	a 5.763 · b 11.526 · c 9.456 Å · α 90° · β 90° · γ 90°
Transition	33 K (−240 °C)
Measured at	4.2 K
Magnetic ions	Mn
Largest moment component	4.57 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 b′ c′ n →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	0	−4.57	0	4.57
Mn2_1	Mn	0	0.125	0.625	0	1.38	3.23	3.5124
Mn2_2	Mn	0	0.375	0.625	0	1.38	−3.23	3.5124
Mn2_3	Mn	0.25	0	0.375	0	1.3	2.85	3.1325
O1_1	O	0	0.1135	0.383
O1_2	O	0.773	0.25	0.633
O1_3	O	0.727	0.25	0.117
O1_4	O	0.5	0.3635	0.883

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

B. Chardon et al. J. Magn. Magn. Mat. (1986) · doi:10.1016/0304-8853(86)90132-0

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 2.90_Mn3O4.mcif from MAGNDATA · entry page

sha256 of this copy: 088b4dc91cb03abe67581a6c4ac01913f3b71da6ea3f1638e224ea31aa38a72d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 2.90_Mn3O4.mcif.