Research/Sitter/MAGNDATA / 1.656_CoNb2O6.mcif

CoNb₂O₆

MAGNDATA entry 1.656 · 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.

Structure · 10 properties

Magnetic group	P_a 2₁/c BNS 14.80
Point group	2/m1′
Parent space group	P b c n No. 60
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 14.1475 · b 5.712 · c 10.0892 Å · α 90° · β 90° · γ 90°
Measured at	4.2 K
Magnetic ions	Co
Largest moment component	1 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_a 2₁/c →

Atom sites · 9 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0	0.1818	0.125	1	0	0	1
Nb1_1	Nb	0.1616	0.3242	0.3723
Nb1_2	Nb	0.3384	0.1758	0.6222
O1_1	O	0.0952	0.3966	0.2165
O1_2	O	0.4048	0.1034	0.4664
O2_1	O	0.0753	0.1153	0.4442
O2_2	O	0.4247	0.3847	0.6942
O3_1	O	0.2523	0.1238	0.2847
O3_2	O	0.2477	0.3762	0.5346

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. Solid State Communications (1973) · doi:10.1016/0038-1098(73)90517-6

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.656_CoNb2O6.mcif from MAGNDATA · entry page

sha256 of this copy: fb71aaae1d95472664f7bf58b0a4a817b0ce87b3dc286d20838f8390e46f61df
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.656_CoNb2O6.mcif.