Research/Sitter/MAGNDATA / 0.102_Mn2GeO4.mcif

Mn₂GeO₄

MAGNDATA entry 0.102 · source

noncoplanar magnet

Spins pointing in three dimensions, not confined to a plane.

ordered ≤ 17 K (−256 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P n m a BNS 62.441
Point group	mmm
Parent space group	P n m a No. 62
Spins	noncoplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.6941 · b 6.2879 · c 5.0558 Å · α 90° · β 90° · γ 90°
Transition	17 K (−256 °C)
Measured at	7 K
Magnetic ions	Mn
Largest moment component	4.9 μ_B
Method	NSD

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 n m a →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	1.5	3.5	1.5	4.0927
Mn2	Mn	0.2791	0.25	0.9906	0	4.9	0	4.9
Ge1	Ge	0.0968	0.25	0.4343
O1	O	0.0933	0.25	0.7784
O2	O	0.4464	0.25	0.2206
O3	O	0.1649	0.0296	0.2753

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

J.S. White et al. PHYSICAL REVIEW LETTERS (2012) · doi:10.1103/PhysRevLett.108.077204

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.102_Mn2GeO4.mcif from MAGNDATA · entry page

sha256 of this copy: f581f2c4c0412d9c153cc05614eac31bf2d8f8b2b62c369248f4ce896462cb74
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.102_Mn2GeO4.mcif.