Research/Sitter/MAGNDATA / 1.143_Mn3Pt.mcif

Mn₃Pt

MAGNDATA entry 1.143 · 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 ≤ 475 K (202 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_c 4₂/m c m BNS 132.456
Point group	4/mmm1′
Parent space group	P m 3m No. 221
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 3.83 · b 3.83 · c 7.66 Å · α 90° · β 90° · γ 90°
Transition	475 K (202 °C)
Measured at	384 K
Magnetic ions	Mn
Largest moment component	3.4 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 P_c 4₂/m c m →

Atom sites · 3 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Pt1	Pt	0	0	0
Mn1_1	Mn	0	0.5	0.25	0	0	3.4	3.4
Mn1_2	Mn	0.5	0.5	0

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

E. Kren et al. Physical Review (1968) · doi:10.1103/PhysRev.171.574

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.143_Mn3Pt.mcif from MAGNDATA · entry page

sha256 of this copy: 2ee0020157853f30395374ae6adf55b066682de994cfec21c3e5a582f98a8e2a
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.143_Mn3Pt.mcif.