Research/Sitter/MAGNDATA / 1.42_La2NiO4.mcif

La₂NiO₄

MAGNDATA entry 1.42 · 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 ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 330 K (57 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_C m n a BNS 53.335
Point group	mmm1′
Parent space group	B m e b No. 64
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 0 0] 1k
Cell	a 5.4419 · b 5.5364 · c 12.4896 Å · α 90° · β 90° · γ 90°
Transition	330 K (57 °C)
Measured at	120 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_C m n a →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
La1	La	0	−0.0102	0.3639
Ni1	Ni	0	0	0	1.6	0	0	1.6
O1	O	0.25	0.75	0.0109
O2	O	0	0.0417	0.1771

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. Rodriguez-Carvajal et al. J. Phys.: Condens. Matter (1991) · doi:10.1088/0953-8984/3/19/002

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.42_La2NiO4.mcif from MAGNDATA · entry page

sha256 of this copy: dc055c8f31a7e5e115928e44db26355393d993fe11eec7b1f02aa3799e7129f1
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.42_La2NiO4.mcif.