Research/Sitter/MAGNDATA / 1.352_Ba2Ni2F7Cl.mcif

Ba₂Ni₂F₇Cl

MAGNDATA entry 1.352 · 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 ≤ 92 K (−181 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_c 2₁/c BNS 14.82
Parent space group	P 2₁/m No. 11
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/2 0 0] 1k
Cell	a 15.178 · b 5.759 · c 8.776 Å · α 90° · β 106.71° · γ 90°
Transition	92 K (−181 °C)
Measured at	1.5 K
Magnetic ions	Ni
Largest moment component	1.57 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 2₁/c →

Atom sites · 9 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ba1	Ba	0.1555	0.25	0.5819
Ba2	Ba	0.1537	0.25	0.0687
Ni1	Ni	0.4123	0.25	0.7182	1.57	0	1	1.6006
Ni2	Ni	0.4076	0.25	0.1795	−1.57	0	−0.1	1.5442
Cl1	Cl	0.4416	0.25	0.471
F1	F	0.3161	0.0038	0.1555
F2	F	0.0011	0.9965	0.8269
F3	F	0.317	0.0066	0.6561
F4	F	0.378	0.25	0.9363

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. Fompeyrine et al. JOURNAL OF SOLID STATE CHEMISTRY (1997) · doi:10.1006/jssc.1997.7352

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.352_Ba2Ni2F7Cl.mcif from MAGNDATA · entry page

sha256 of this copy: a93deaa795b8d91beee039fcec43903574b8399ebf5d84a4cdd36a2d8317a5d1
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.352_Ba2Ni2F7Cl.mcif.