Research/Sitter/MAGNDATA / 0.1192_Ni4Nb2O9.mcif

Ni₄Nb₂O₉

MAGNDATA entry 0.1192 · source

s-wave ferrimagnet

Opposite moments of different size leave a net magnetisation.

Spin group ¹m¹m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 76 K (−197 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P b′ c n′ BNS 60.424
Point group	m′m′m
Parent space group	P b c n No. 60
Spins	collinear · net moment 2.16 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 8.7184 · b 5.0742 · c 14.2989 Å · α 90° · β 90° · γ 90°
Transition	76 K (−197 °C)
Measured at	1.5 K
Magnetic ions	Ni
Largest moment component	2 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 b′ c n′ →

Atom sites · 8 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ni1	Ni	0.3349	0.993	0.501	0	2	0	2
Ni2	Ni	0.336	0.9972	0.687	0	−1.73	0	1.73
Nb	Nb	0.028	0.996	0.855
O1	O	0	0.287	0.75
O2	O	0.1669	0.1694	0.9285
O3	O	0.163	0.1748	0.5975
O4	O	0.1486	0.149	0.2502
O5	O	0.5008	0.1671	0.9155

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

Elodie Tailleur et al. J. Appl. Phys. (2020) · doi:10.1063/1.5134056

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.1192_Ni4Nb2O9.mcif from MAGNDATA · entry page

sha256 of this copy: a79bf6dca4fa34cf9d42e270e0625b24709ce3701172b4e889991c02c5e49961
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.1192_Ni4Nb2O9.mcif.