Research/Sitter/MAGNDATA / 0.580_Na2NiFeF7.mcif

Na₂NiFeF₇

MAGNDATA entry 0.580 · source

noncollinear ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 88 K (−185 °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 74.559
Parent space group	I m m a No. 74
Spins	coplanar · net moment 14.56 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 7.203 · b 10.255 · c 7.429 Å · α 90° · β 90° · γ 90°
Transition	88 K (−185 °C)
Measured at	4.2 K
Magnetic ions	Fe, Ni
Largest moment component	4.93 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
Ni1	Ni	0.25	0.25	0.25	1.29	0	0.43	1.3598
Fe1	Fe	0	0	0.5	−4.93	0	0	4.93
F1	F	0	0.25	0.143
F2	F	0	0.417	0.733
F3	F	0.196	0.377	0.429

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. JOURNAL OF SOLID STATE CHEMISTRY (1989) · doi:10.1016/0022-4596(89)90128-X

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.580_Na2NiFeF7.mcif from MAGNDATA · entry page

sha256 of this copy: d5c2401c8665931c8126b1fcf6984294d7f9b0d10da950d1689b247b3764b551
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.580_Na2NiFeF7.mcif.