Research/Sitter/MAGNDATA / 1.184_Na2Co2TeO6.mcif

Na₂Co₂TeO₆

MAGNDATA entry 1.184 · 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 ≤ 27 K (−246 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_C 2₁2₁2₁ BNS 19.29
Point group	2221′
Parent space group	P 6₃22 No. 182
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 0] 1k
Cell	a 10.5254 · b 5.2627 · c 11.182 Å · α 90° · β 90° · γ 120°
Transition	27 K (−246 °C)
Measured at	2 K
Magnetic ions	Co
Largest moment component	2.95 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_C 2₁2₁2₁ →

Atom sites · 13 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0	0	0.25	0	2.95	0	2.95
Co2	Co	0.1667	0.6667	0.75	0	−2.5	0	2.5
Te1	Te	0.1667	0.6667	0.25
O1_1	O	0.329	0.983	0.3469
O1_2	O	0.5085	0.675	0.3469
O1_3	O	0.1625	0.342	0.3469
Na1_1	Na	0.095	0.62	0.97
Na1_2	Na	0.69	0.57	0.97
Na1_3	Na	0.215	0.81	0.97
Na2	Na	0	0	0
Na3_1	Na	0.335	0.05	0.99
Na3_2	Na	0.975	0.62	0.99
Na3_3	Na	0.69	0.33	0.99

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

E. Lefrançois et al. PHYSICAL REVIEW B (2016) · doi:10.1103/PhysRevB.94.214416

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.184_Na2Co2TeO6.mcif from MAGNDATA · entry page

sha256 of this copy: 36c4b2f2912f94d2404ecc428a7b91391f99423f203bc09daccf2e8c906a77df
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.184_Na2Co2TeO6.mcif.