Research/Sitter/MAGNDATA / 0.156_CaMnGe2O6.mcif

CaMnGe₂O₆

MAGNDATA entry 0.156 · 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 ≤ 15 K (−258 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C 2′/c BNS 15.87
Point group	2′/m
Parent space group	C 2/c No. 15
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.2794 · b 9.1756 · c 5.4714 Å · α 90° · β 104.24° · γ 90°
Transition	15 K (−258 °C)
Measured at	2 K
Magnetic ions	Mn
Largest moment component	4.3 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 2′/c →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ca1	Ca	0	0.3075	0.25
Mn1	Mn	0	0.905	0.25	4.3	0	1.14	4.1687
Ge1	Ge	0.286	0.0958	0.2319
O1	O	0.1133	0.0949	0.1444
O2	O	0.3668	0.2532	0.3545
O3	O	0.3565	0.0324	0.9802

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

L. Ding et al. PHYSICAL REVIEW B (2016) · doi:10.1103/PhysRevB.93.064423

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.156_CaMnGe2O6.mcif from MAGNDATA · entry page

sha256 of this copy: ffda55cd6baef46179198f7afdd97d3e6402c5069b94db0ff4d6fb2c7a2e6952
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.156_CaMnGe2O6.mcif.