Research/Sitter/MAGNDATA / 0.312_MnGeO3.mcif

MnGeO₃

MAGNDATA entry 0.312 · 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 ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 35.1 K (−238 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C 2′/c BNS 15.87
Parent space group	C 2/c No. 15
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 9.9007 · b 9.2572 · c 5.2655 Å · α 90° · β 101.47° · γ 90°
Transition	35.1 K (−238 °C)
Measured at	4 K
Magnetic ions	Mn
Largest moment component	4.37 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 C 2′/c →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0.8898	0.25	4.37	0	0.62	4.29
Mn2	Mn	0	0.2749	0.25	4.37	0	0.62	4.29
Ge1	Ge	0.2998	0.0947	0.2117
O1	O	0.1169	0.0967	0.1421
O2	O	0.3786	0.2402	0.3716
O3	O	0.3566	0.0671	0.9155

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

⬇ 0.312_MnGeO3.mcif from MAGNDATA · entry page

sha256 of this copy: 2528ed9d9c99c482de3e4f35d1019e73d3c6d66273795140bb2a0bea0bfac10a
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.312_MnGeO3.mcif.