Research/Sitter/MAGNDATA / 0.125_MnGeO3.mcif

MnGeO₃

MAGNDATA entry 0.125 · 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 ≤ 120 K (−153 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	R 3′ BNS 148.19
Point group	3′
Parent space group	R 3 No. 148
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.0125 · b 5.0125 · c 14.2986 Å · α 90° · β 90° · γ 120°
Transition	120 K (−153 °C)
Measured at	4.2 K
Magnetic ions	Mn
Largest moment component	4.6 μ_B
Method	NPD, TOF

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)
Mn1	Mn	0	0	0.6383	0	0	4.6	4.6
Ge1	Ge	0	0	0.1569
O1	O	0.2919	0.0644	0.2684

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

K. Tsuzuki et al. J. Phys. Soc. Jpn (1974) · doi:10.1143/JPSJ.37.1242

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.125_MnGeO3.mcif from MAGNDATA · entry page

sha256 of this copy: 33063298d5faa688de129af06a8b77182b028607f16f8008cc66fcd7a35a518d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.125_MnGeO3.mcif.