Research/Sitter/MAGNDATA / 1.194_NiWO4.mcif

NiWO₄

MAGNDATA entry 1.194 · source

antiferromagnet

No net magnetisation, and up and down sublattices are related by a shift or by inversion, so the bands stay spin-degenerate: a conventional antiferromagnet.

Spin group ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 62 K (−211 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_a 2/c BNS 13.70
Point group	2/m1′
Parent space group	P 2/c No. 13
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 0] 1k
Cell	a 9.1984 · b 5.6606 · c 4.9068 Å · α 90° · β 90.03° · γ 90°
Transition	62 K (−211 °C)
Magnetic ions	Ni
Largest moment component	2.12 μ_B
Method	Magnetic structure originally determined in C. Wilkinson and M. J. Sprague, Z. Kristallogr. - Cryst. Mater.

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_a 2/c →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ni1	Ni	0.25	0.6616	0.25	−0.75	0	−2.12	2.2484
W1	W	0	0.1786	0.25
O1	O	0.112	0.1105	0.9204
O2	O	0.1322	0.3772	0.3953

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

M.A. Prosnikov et al. PHYSICAL REVIEW B (2017) · doi:10.1103/PhysRevB.96.014428

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.194_NiWO4.mcif from MAGNDATA · entry page

sha256 of this copy: 8c2755e01f9a8199311d594e3f14357178a7212b3958ded9caba7fe555521b80
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.194_NiWO4.mcif.