Research/Sitter/MAGNDATA / 1.13_Ba3Nb2NiO9.mcif

Ba₃Nb₂Ni₁O₉

MAGNDATA entry 1.13 · source

p-wave magnet

Coplanar spins, no net moment, and a translation that reverses every spin: spin splitting that is odd in momentum (p-wave).

ordered ≤ 4.9 K (−268 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_c 3 1 c BNS 159.64
Point group	3m1′
Parent space group	P 3 m 1 No. 164
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/3 1/3 3/2] 1k
Cell	a 17.265 · b 17.265 · c 14.1312 Å · α 90° · β 90° · γ 120°
Transition	4.9 K (−268 °C)
Measured at	2 K
Magnetic ions	Ni
Largest moment component	2.08 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_c 3 1 c →

Atom sites · 14 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ba1_1	Ba	0.1111	0.2222	0.8319
Ba1_2	Ba	0.4444	0.2222	0.8319
Ba1_3	Ba	0.8889	0.7778	0.1681
Ba2_1	Ba	0	0	0
Ni1	Ni	0	0	0.25	1.04	2.08	0	1.8013
Nb2_1	Nb	0.1111	0.2222	0.0885
Nb2_2	Nb	0.4444	0.2222	0.0885
Nb2_3	Nb	0.8889	0.7778	0.9115
O1_1	O	0.1667	0	0
O1_2	O	0.8333	0.6667	0
O2_1	O	0.0566	0.9434	0.1631
O2_2	O	0.0566	0.1132	0.1631
O2_3	O	0.1132	0.0566	0.8369
O2_4	O	0.9434	0.8868	0.8369

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

J. Hwang et al. Phys. Rev. Lett. (2012) · doi:10.1103/PhysRevLett.109.257205

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.13_Ba3Nb2NiO9.mcif from MAGNDATA · entry page

sha256 of this copy: 88f00cccba66583cfd4ab124f7dc545c16461bba02cde66ad9b2f40adff6cb8e
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.13_Ba3Nb2NiO9.mcif.

Ba3Nb2Ni1O9

Symmetry

Source

Original file

Ba₃Nb₂Ni₁O₉