Research/Sitter/MAGNDATA / 0.573_Na2NiCrF7.mcif

Na₂NiCrF₇

MAGNDATA entry 0.573 · source

noncollinear ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 4 K (−269 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	I m′ m′ a BNS 74.558
Parent space group	I m m a No. 74
Spins	coplanar · net moment 7.2 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 7.183 · b 10.224 · c 7.414 Å · α 90° · β 90° · γ 90°
Transition	4 K (−269 °C)
Measured at	1.5 K
Magnetic ions	Cr, Ni
Largest moment component	2.22 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 I m′ m′ a →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Na1	Na	0	0	0
Na2	Na	0.25	0.25	0.75
F1	F	0	0.25	0.144
F2	F	0	0.412	0.7265
F3	F	0.1957	0.385	0.4361
Ni1	Ni	0.25	0.25	0.25	1.7	0	0.42	1.7511
Cr1	Cr	0	0	0.5	0	0.03	−2.22	2.2202

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

Y. Laligant et al. Z. anorg. allg. Chem. (1987) · doi:10.1002/zaac.19875531019

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.573_Na2NiCrF7.mcif from MAGNDATA · entry page

sha256 of this copy: 4abda0be47dd8eb75bae275f2df7954dcb30e41d07dbc3893d8dca841cc961e6
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.573_Na2NiCrF7.mcif.