Research/Sitter/MAGNDATA / 1.457_NdNiMg15.mcif

NdNiMg₁₅

MAGNDATA entry 1.457 · 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 ≤ 9 K (−264 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_B c c a BNS 54.350
Parent space group	P 4/n m m No. 129
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 20.1204 · b 20.1204 · c 7.7612 Å · α 90° · β 90° · γ 90°
Transition	9 K (−264 °C)
Measured at	1.5 K
Magnetic ions	Nd
Largest moment component	2.7 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_B c c a →

Atom sites · 9 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Nd1	Nd	0.125	0.125	0.9334	0	0	2.7	2.7
Ni1	Ni	0.125	0.125	0.4305
Mg1_1	Mg	0	0	0
Mg1_2	Mg	0.25	0	0
Mg2	Mg	0.125	0.4509	0.8495
Mg3	Mg	0.375	0.125	0.5
Mg4_1	Mg	0.4551	0.4551	0.3906
Mg4_2	Mg	0.7949	0.4551	0.3906
Mg5	Mg	0.125	0.2401	0.267

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

E.A. Asmar et al. Inorg. Chem. (2018) · doi:10.1021/acs.inorgchem.8b02007

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.457_NdNiMg15.mcif from MAGNDATA · entry page

sha256 of this copy: c408419e47f348e714dd9a15cc520dc013e77ace0a38dff8936dcf8c909e2c18
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.457_NdNiMg15.mcif.