Research/Sitter/MAGNDATA / 0.815_MnNb2O6.mcif

Mn

MAGNDATA entry 0.815 · 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 < 4.2 K (−269 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P b′ c n BNS 60.419
Point group	m′mm
Parent space group	P b c n No. 60
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 14.4204 · b 5.7566 · c 5.0784 Å · α 90° · β 90° · γ 90°
Transition	<4.2 K (−269 °C)
Measured at	2 K
Magnetic ions	Mn
Largest moment component	4 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 n →

Atom sites · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0.2011	0.25	4	0	0	4
Nb1	Nb	0.1602	0.3158	0.748
O1	O	0.0975	0.3975	0.4241
O2	O	0.0875	0.1229	0.8916
O3	O	0.2464	0.1203	0.5973

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

H. Weitzel et al. ZAAC (1971) · doi:10.1002/zaac.19713800202

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.815_MnNb2O6.mcif from MAGNDATA · entry page

sha256 of this copy: 3f57aa3a012b5e25ef1811ad6bc5c60f09c2effb393e598b239cc4a276d87570
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.815_MnNb2O6.mcif.