Research/Sitter/MAGNDATA / 0.962_LiCrGe2O6.mcif

Li₁Cr₁Ge₂O₆

MAGNDATA entry 0.962 · 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 ≤ 6 K (−267 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P 2₁′/c BNS 14.77
Point group	2′/m
Parent space group	P 2₁/c No. 14
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 9.7914 · b 8.7156 · c 5.335 Å · α 90° · β 108.92° · γ 90°
Transition	6 K (−267 °C)
Measured at	1 K
Magnetic ions	Cr
Largest moment component	2.18 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 2₁′/c →

Atom sites · 10 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Li1	Li	0.2588	0.4856	0.722
Cr1	Cr	0.2509	0.6583	0.214	2.18	0	1.1	2.0994
Ge1	Ge	0.047	0.3446	0.2759
Ge2	Ge	0.5546	0.8421	0.2288
O1	O	0.8568	0.3341	0.1738
O2	O	0.1146	0.5267	0.2851
O3	O	0.1174	0.2916	0.61
O4	O	0.3644	0.8308	0.1045
O5	O	0.6317	0.0058	0.3891
O6	O	0.6136	0.6881	0.4535

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. Phys. Chem. Minerals (2015) · doi:10.1007/s00269-015-0738-9

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.962_LiCrGe2O6.mcif from MAGNDATA · entry page

sha256 of this copy: 4f63b0c2b9d195bd4ef9c74e006177b9b8a92a913faffcd6f798aa4a033c641e
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.962_LiCrGe2O6.mcif.

Li1Cr1Ge2O6

Symmetry

Source

Original file

Li₁Cr₁Ge₂O₆