Research/Sitter/MAGNDATA / 1.404_Sr2CuO2Cl2.mcif

Sr₂CuO₂Cl₂

MAGNDATA entry 1.404 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 251 K (−22 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C_A m c a BNS 64.480
Parent space group	I 4/m m m No. 139
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 5.6167 · b 5.6167 · c 15.6126 Å · α 90° · β 90° · γ 90°
Transition	251 K (−22 °C)
Measured at	10 K
Magnetic ions	Cu
Largest moment component	0.34 μ_B
Method	NSD

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_A m c a →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Sr1	Sr	0	0	0.3926
Cu1	Cu	0	0	0	0.34	0	0	0.34
O1	O	0.75	0.25	0
Cl1	Cl	0	0	0.1831

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

D. Vaknin et al. PHYSICAL REVIEW B (1990) · doi:10.1103/PhysRevB.41.1926

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.404_Sr2CuO2Cl2.mcif from MAGNDATA · entry page

sha256 of this copy: 53dd1614789ffcfaccbadbef6eb985b80e3a4cc308dbc8f299ebee722ae0853d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.404_Sr2CuO2Cl2.mcif.