Research/Sitter/MAGNDATA / 0.277_MgMnO3.mcif

MgMnO₃

MAGNDATA entry 0.277 · 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 ¹3̄ × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 37.9 K (−235 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	R 3′ BNS 148.19
Parent space group	R 3 No. 148
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.9364 · b 4.9364 · c 13.7073 Å · α 90° · β 90° · γ 120°
Transition	37.9 K (−235 °C)
Measured at	3 K
Magnetic ions	Mn
Largest moment component	2.53 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 3′ →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mg1	Mg	0	0	0.3587
Mn1	Mn	0	0	0.1604	0	0	2.53	2.53
O1	O	0.3482	0.0378	0.0883

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

Y. Haraguchi et al. PHYSICAL REVIEW MATERIALS (2019) · doi:10.1103/PhysRevMaterials.3.124406

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.277_MgMnO3.mcif from MAGNDATA · entry page

sha256 of this copy: b0d3032bd5319fab052626a8c48060f9585df6a5e9988d43ee24bf3622afd184
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.277_MgMnO3.mcif.