Research/Sitter/MAGNDATA / 0.103_Mn2GeO4.mcif

Mn₂GeO₄

MAGNDATA entry 0.103 · source

noncoplanar magnet

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

ordered ≤ 5.5 K (−268 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P 2₁/c BNS 14.75
Point group	2/m
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 10.6926 · b 6.2851 · c 5.0557 Å · α 90° · β 90° · γ 90°
Transition	5.5 K (−268 °C)
Measured at	1.4 K
Magnetic ions	Mn
Largest moment component	3.4 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 2₁/c →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1_1	Mn	0	0	0	1.9	2.8	0.3	3.3971
Mn1_2	Mn	0	0.5	0	1.7	2.4	−0.3	2.9563
Mn2	Mn	0.2794	0.25	0.9903	2.9	3.4	0	4.4688
Ge1	Ge	0.0968	0.25	0.0435
O1	O	0.0934	0.25	0.7782
O2	O	0.4466	0.25	0.2202
O3_1	O	0.165	0.0298	0.2754
O3_2	O	0.835	0.5298	0.7246

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

⬇ 0.103_Mn2GeO4.mcif from MAGNDATA · entry page

sha256 of this copy: f1d5e8aca8ca2183a64936dd7b81a445b8c8ca3d0723b98ca6afcdb92ca3c2aa
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.103_Mn2GeO4.mcif.