Research/Sitter/MAGNDATA / 1.822_Sr2MnSi2O7.mcif

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Spin lattice of Sr2Mn1Si2O7Spin lattice of Sr2Mn1Si2O7

Sr2Mn1Si2O7

MAGNDATA entry 1.822 · 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 ≤ 3.4 K (−270 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.
Structure · 11 properties
Magnetic groupCc m c 21 BNS 36.177
Point groupmm21′
Parent space groupP 4 21 m No. 113
Spinscollinear · net moment 0 μB per cell
Propagation[0 0 1/2] 1k
Cella 8.1217 · b 8.12177 · c 10.29773 Å · α 90° · β 90° · γ 90°
Transition3.4 K (−270 °C)
Measured at1.7 K
Magnetic ionsMn
Largest moment component2.3 μB
MethodNPD

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 Cc m c 21 →
Atom sites · 11 sites · CSV
siteelementxyzmambmc|m| (μB)
Mn1Mn000.0062.32.203.1828
Sr1_1Sr0.82840.32840.251
Sr1_2Sr0.340.160.756
Si1_1Si0.63850.13850.041
Si1_2Si0.1370.3630.977
O1_1O00.50.414
O1_2O0.500.581
O2_1O0.64470.14470.377
O2_2O0.13220.36790.629
O3_1O0.08420.19910.401
O3_2O0.19010.92880.609

Moment components are along the crystal axes a, b, c (μB), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

Y. Nambu et al. Acta Cryst. B (2024) · doi:10.1107/S2052520624007625

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.822_Sr2MnSi2O7.mcif from MAGNDATA · entry page

sha256 of this copy: 113363d0df72b59acc6a23eb9df0732950adb54446963d886b403a94d316142b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.822_Sr2MnSi2O7.mcif.