Research/Sitter/MAGNDATA / 0.601_CaMnGe.mcif

CaMnGe

MAGNDATA entry 0.601 · 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 ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 420 K (147 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 2₁/m′ BNS 11.53
Parent space group	P 4/n m m No. 129
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.227 · b 4.227 · c 7.201 Å · α 90° · β 90° · γ 90°
Transition	420 K (147 °C)
Measured at	2 K
Magnetic ions	Mn
Largest moment component	2.77 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/m′ →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0.25	0.75	0	−1.87	0	2.77	3.3421
Ca1	Ca	0.25	0.25	0.69
Ge1	Ge	0.25	0.25	0.235

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

R. Welter et al. Solid State Communications (1996) · doi:10.1016/0038-1098(95)00693-1

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.601_CaMnGe.mcif from MAGNDATA · entry page

sha256 of this copy: c564803bca131d15b312558b450f05d036267a10b867e6ce6ba38cd0197c2290
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.601_CaMnGe.mcif.