Research/Sitter/MAGNDATA / 1.742_KNiAsO4.mcif

K₁Ni₁As₁O₄

MAGNDATA entry 1.742 · 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 ¹1̄ × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 19 K (−254 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_S 1 BNS 2.7
Point group	11′
Parent space group	R 3 No. 148
Spins	collinear · net moment 0 μ_B per cell
Propagation	[3/2 0 0] 1k
Cell	a 9.9736 · b 4.9868 · c 28.6192 Å · α 90° · β 90° · γ 120°
Transition	19 K (−254 °C)
Measured at	2 K
Magnetic ions	Ni
Largest moment component	1.6 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_S 1 →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ni1	Ni	0	0	0.1652	−0.2	1.6	0.7	1.8466
K1	K	0	0	0.2893
As1	As	0	0	0.5599
O1_1	O	0.003	0.3454	0.1249
O1_2	O	0.8273	0.6606	0.1249
O1_3	O	0.1697	0.994	0.1249
O2	O	0	0	0.6183

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

K. M. Taddei et al. PHYSICAL REVIEW RESEARCH (2023) · doi:10.1103/PhysRevResearch.5.013022

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.742_KNiAsO4.mcif from MAGNDATA · entry page

sha256 of this copy: af5f0633b6402588712c437a2cf9705823412cdb27a109ce304a17d65c29ee2b
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.742_KNiAsO4.mcif.

K1Ni1As1O4

Symmetry

Source

Original file

K₁Ni₁As₁O₄