Research/Sitter/MAGNDATA / 0.101_Mn2GeO4.mcif

Mn₂GeO₄

MAGNDATA entry 0.101 · source

noncollinear antiferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

ordered ≤ 47 K (−226 °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 62.446
Point group	m′m′m
Parent space group	P n m a No. 62
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.6949 · b 6.2875 · c 5.056 Å · α 90° · β 90° · γ 90°
Transition	47 K (−226 °C)
Measured at	20 K
Magnetic ions	Mn
Largest moment component	4.5 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	3	0.4	0	3.0265
Mn2	Mn	0.2794	0.25	0.9906	4.5	0	0	4.5
Ge1	Ge	0.0969	0.25	0.4346
O1	O	0.0934	0.25	0.7782
O2	O	0.4464	0.25	0.2204
O3	O	0.1648	0.0296	0.2754

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

⬇ 0.101_Mn2GeO4.mcif from MAGNDATA · entry page

sha256 of this copy: 353cbd30295b408a81888c9d9b7e705e889b2174c09a0f3684089f549264d059
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.101_Mn2GeO4.mcif.