Research/Sitter/MAGNDATA / 1.1.160_Na2BaMn(PO4)2.mcif

Na₂BaMn(PO₄)₂

MAGNDATA entry 1.1.160 · source

incommensurate spin-density wave

Incommensurate: the magnetic pattern repeats every so many cells, but not a whole number of them, so it never lines up with the crystal lattice. Here it's a spin-density wave: the size of the spin swells and shrinks as you move along.

ordered ≤ 1.3 K (−272 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P31′(1/3,1/3,γ)0s
Point group	31′
Parent space group	P 3 No. 147
Repeats every	3 cells along a (not a whole number: that's what incommensurate means)
Propagation	[0.33333 0.33333 0.147] 1k
Cell	a 5.3729 · b 5.3729 · c 7.0954 Å · α 90° · β 90° · γ 120°
Transition	1.28 K (−272 °C)
Measured at	1.2 K
Magnetic ions	Mn
Largest moment component	2.06899 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 P31′(1/3,1/3,γ)0s →

Atom sites · 6 sites · CSV

site	element	x	y	z
Na1_1	Na	0.3333	0.6667	0.186
P1_1	P	0.3333	0.6667	0.7371
O1_1	O	0.3333	0.6667	0.5229
O2_1	O	0.3619	0.2357	0.1871
Ba02_1	Ba	0	0	0.5
Mn1_1	Mn	0	0	0

Incommensurate: the moments are modulated; the picture evaluates each atom's Fourier series at its own phase.

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

N. Biniskos et al. PHYSICAL REVIEW B (2025) · doi:10.1103/kszh-m6bf

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.160_Na2BaMn(PO4)2.mcif from MAGNDATA · entry page

sha256 of this copy: 1b34f496388d209c507e581f09040d3e4ba2c4a92b6adeda3074c1e1796abc34
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.160_Na2BaMn(PO4)2.mcif.