Research/Sitter/MAGNDATA / 0.1153_Bi2NiO2F4.mcif

Bi₂Ni₁O₂F₄

MAGNDATA entry 0.1153 · 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 ≤ 45 K (−228 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P c a 2₁ BNS 29.99
Point group	mm2
Parent space group	P 2₁ a b No. 29
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.414 · b 5.4137 · c 16.0399 Å · α 90° · β 90° · γ 90°
Transition	45 K (−228 °C)
Measured at	1.5 K
Magnetic ions	Ni
Largest moment component	1.1 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 a 2₁ →

Atom sites · 9 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Bi1	Bi	0.031	0.5	0.5803
Bi2	Bi	0.037	0.006	0.0796
Ni1	Ni	0.04	0.505	0.2427	1.1	0	0.7	1.3038
F1	F	0.251	0.212	0.284
F2	F	0.972	0.486	0.1302
F3	F	0.989	0.524	0.3731
F4	F	0.345	0.695	0.2497
O1	O	0.282	0.247	0.999
O2	O	0.278	0.753	0.5082

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

Olivier Mentre et al. Chem. Mater. (2022) · doi:10.1021/acs.chemmater.2c01213

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.1153_Bi2NiO2F4.mcif from MAGNDATA · entry page

sha256 of this copy: 021c35c5b3a551cc6239da5ed8d03203ec646d30f6e0c32f56ca1adfe0a52a42
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.1153_Bi2NiO2F4.mcif.

Bi2Ni1O2F4

Symmetry

Source

Original file

Bi₂Ni₁O₂F₄