Research/Sitter/MAGNDATA / 1.0.8_Ba3MnNb2O9.mcif

Ba₃MnNb₂O₉

MAGNDATA entry 1.0.8 · source

noncollinear antiferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

ordered ≤ 3.4 K (−270 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P 31m BNS 157.53
Point group	3m
Parent space group	P 3m 1 No. 164
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/3 1/3 0] 1k
Cell	a 17.4108 · b 17.4108 · c 7.0808 Å · α 90° · β 90° · γ 120°
Transition	3.4 K (−270 °C)
Measured at	1.5 K
Magnetic ions	Mn
Largest moment component	4.91 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 P 31m →

Atom sites · 14 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0.5	−4.91	−4.91	0	4.91
Nb1_1	Nb	0.1111	0.2222	0.1762
Nb1_2	Nb	0.2222	0.1111	0.8238
Nb1_3	Nb	0.2222	0.7778	0.8238
Ba1_1	Ba	0.1111	0.2222	0.6617
Ba1_2	Ba	0.2222	0.1111	0.3383
Ba1_3	Ba	0.2222	0.7778	0.3383
Ba2	Ba	0	0	0
O1_1	O	0.1667	0	0
O1_2	O	0	0.1667	0
O2_1	O	0.0575	0.9425	0.3229
O2_2	O	0.0575	0.1151	0.3229
O2_3	O	0.9425	0.0575	0.6771
O2_4	O	0.1151	0.0575	0.6771

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

M. Lee et al. PHYSICAL REVIEW B (2014) · doi:10.1103/PhysRevB.90.224402

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.0.8_Ba3MnNb2O9.mcif from MAGNDATA · entry page

sha256 of this copy: d7e2171746df97e1770bec8c093b630b71131d7b78ac224e03774b98c05b8515
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.0.8_Ba3MnNb2O9.mcif.