Research/Sitter/MAGNDATA / 1.344_Ba2Co9O14.mcif

Ba₂Co₉O₁₄

MAGNDATA entry 1.344 · 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 ¹3̄¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 41 K (−232 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_c 2/m BNS 12.63
Parent space group	R 3 m No. 166
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 3/2] 1k
Cell	a 5.6928 · b 5.6928 · c 57.72 Å · α 90° · β 90° · γ 120°
Transition	41 K (−232 °C)
Measured at	5 K
Magnetic ions	Co
Largest moment component	2.88 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_c 2/m →

Atom sites · 12 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0	0	0.2942
Co2	Co	0	0	0.25
Co3	Co	0	0	0.1164	2.88	0	0	2.88
Co4_1	Co	0.5	0	0
Co4_2	Co	0	0.5	0
Co5	Co	0	0	0	1.76	0	0	1.76
Ba1	Ba	0	0	0.4417
O1_1	O	0.1506	0.8494	0.2281
O1_2	O	0.1506	0.3012	0.2281
O2	O	0	0	0.3498
O3_1	O	0.4851	0.5149	0.1477
O3_2	O	0.4851	0.9702	0.1477

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

J. Herrero-Martn et al. PHYSICAL REVIEW B (2017) · doi:10.1103/PhysRevB.95.235129

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.344_Ba2Co9O14.mcif from MAGNDATA · entry page

sha256 of this copy: d4ef3cea307e0e849b05268943ed4234b8a495ff9f524fe0fc4d626d86f81a9b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.344_Ba2Co9O14.mcif.