Research/Sitter/MAGNDATA / 1.169_CaCoGe2O6.mcif

CaCoGe₂O₆

MAGNDATA entry 1.169 · 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 ≤ 18.1 K (−255 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_C 2₁/c BNS 14.84
Point group	2/m1′
Parent space group	C 2/c No. 15
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 0 0] 1k
Cell	a 10.1477 · b 8.9518 · c 5.4274 Å · α 90° · β 104.75° · γ 90°
Transition	18.1 K (−255 °C)
Measured at	1.4 K
Magnetic ions	Co
Largest moment component	2.75 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 2₁/c →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0	0.9123	0.25	1.92	0	2.75	2.9258
Ca1	Ca	0	0.3068	0.25
Ge1	Ge	0.286	0.0992	0.228
O1	O	0.1103	0.091	0.139
O2	O	0.3632	0.2631	0.3409
O3	O	0.3565	0.0301	0.9819

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. Journal of Solid State Chemistry (2008) · doi:10.1016/j.jssc.2008.08.014

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.169_CaCoGe2O6.mcif from MAGNDATA · entry page

sha256 of this copy: d5801cd94983b2da916549498cb533982cab55fc6b72b7aac17ee81e3b74dec9
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.169_CaCoGe2O6.mcif.