Research/Sitter/MAGNDATA / 1.136_AgCrS2.mcif

AgCrS₂

MAGNDATA entry 1.136 · 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 ≤ 41 K (−232 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_c m BNS 8.35
Point group	m1′
Parent space group	R 3m No. 160
Spins	collinear · net moment 0 μ_B per cell
Propagation	[-3/4 3/4 -3/4] 1k
Cell	a 13.7861 · b 3.5042 · c 28.4528 Å · α 90° · β 155.276° · γ 90°
Transition	41 K (−232 °C)
Measured at	1.5 K
Magnetic ions	Cr
Largest moment component	2.66 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_c m →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Cr1_1	Cr	0	0	0	0	2.66	0	2.66
Cr1_2	Cr	0.5	0.5	0.25	0	2.66	0	2.66
Ag1_1	Ag	0.8459	0	0.0381
Ag1_2	Ag	0.3459	0.5	0.2881
S1_1	S	0.7263	0	0.0665
S1_2	S	0.2263	0.5	0.3165
S2_1	S	0.2688	0	0.1841
S2_2	S	0.7688	0.5	0.4341

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

F. Damay et al. Phys. Rev. B (2011) · doi:10.1103/PhysRevB.83.184413

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.136_AgCrS2.mcif from MAGNDATA · entry page

sha256 of this copy: 77896bd23e6a87a57b61cafd687b28a55e4056a29ab9fbb8cb59bcd4bc340d09
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.136_AgCrS2.mcif.