Research/Sitter/MAGNDATA / 0.313_MnGeO3.mcif

MnGeO₃

MAGNDATA entry 0.313 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 12 K (−261 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P b′ c a BNS 61.435
Parent space group	P b c a No. 61
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 19.2776 · b 9.2409 · c 5.4676 Å · α 90° · β 90° · γ 90°
Transition	12 K (−261 °C)
Measured at	4 K
Magnetic ions	Mn
Largest moment component	4.05 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 P b′ c a →

Atom sites · 10 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0.1228	0.3456	0.3592	4.05	0	0.1	4.0512
Mn2	Mn	0.3777	0.4818	0.3487	4.05	0	0.1	4.0512
Ge1	Ge	0.2701	0.3425	0.0324
Ge2	Ge	0.4728	0.1634	0.2987
O1	O	0.1808	0.3393	0.0232
O2	O	0.3089	0.5105	0.0401
O3	O	0.3056	0.2244	0.8147
O4	O	0.5624	0.3401	0.8059
O5	O	0.4316	0.486	0.6784
O6	O	0.4453	0.1879	0.6118

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

G.J. Redhammer et al. J. Phys.: Condens. Matter (2011) · doi:10.1088/0953-8984/23/25/254202

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.313_MnGeO3.mcif from MAGNDATA · entry page

sha256 of this copy: c534a2fd683252bba40f1acae7ab8e5b8c223a94f6adfae2ac349306d8b58130
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.313_MnGeO3.mcif.