Research/Sitter/MAGNDATA / 0.92_CaMn2Sb2.mcif

CaMn₂Sb₂

MAGNDATA entry 0.92 · 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 ≤ 83 K (−190 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C 2′/m BNS 12.60
Point group	2′/m
Parent space group	P 3m 1 No. 164
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.5285 · b 4.5285 · c 7.4453 Å · α 90° · β 90° · γ 120°
Transition	83 K (−190 °C)
Measured at	5 K
Magnetic ions	Mn
Largest moment component	2.8 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′/m →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ca1	Ca	0	0	0
Mn1	Mn	0.3333	0.6667	0.6154	2.8	0	0	2.8
Sb1	Sb	0.3333	0.6667	0.2483

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

II W. Ratcliff et al. Journal of Magnetism and Magnetic Materials (2009) · doi:10.1016/j.jmmm.2009.03.054

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.92_CaMn2Sb2.mcif from MAGNDATA · entry page

sha256 of this copy: 42715bd4df089fba3332a4d51485a5b25b11752264ef64932e5dacee560414cb
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.92_CaMn2Sb2.mcif.