Research/Sitter/MAGNDATA / 1.55_Na2MnF5.mcif

Na₂MnF₅

MAGNDATA entry 1.55 · 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 ≤ 11 K (−262 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_b c BNS 7.29
Point group	m1′
Parent space group	P 2₁/c No. 14
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 1/2 0] 1k
Cell	a 7.7197 · b 10.4804 · c 10.8706 Å · α 90° · β 108.99° · γ 90°
Transition	11 K (−262 °C)
Measured at	1.5 K
Magnetic ions	Mn
Largest moment component	3.3 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 →

Atom sites · 16 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	−3.3	0	0	3.3
Mn2	Mn	0.5	0	0	3.3	0	0	3.3
Na1_1	Na	0.1535	0.9947	0.3647
Na1_2	Na	0.8465	0.2447	0.1353
Na2_1	Na	0.3441	0.222	0.18
Na2_2	Na	0.6559	0.4719	0.32
F1_1	F	0.0448	0.0755	0.1629
F1_2	F	0.9552	0.3255	0.3371
F2_1	F	0.8917	0.1489	0.9242
F2_2	F	0.1083	0.3989	0.5758
F3_1	F	0.2514	0.081	0.0031
F3_2	F	0.7486	0.331	0.4969
F4_1	F	0.6179	0.1096	0.1347
F4_2	F	0.3821	0.3596	0.3653
F5_1	F	0.4918	0.1221	0.8772
F5_2	F	0.5082	0.3721	0.6228

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

P. Núnez et al. Solid State Commun. · doi:10.1016/0038-1098(94)00536-2

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.55_Na2MnF5.mcif from MAGNDATA · entry page

sha256 of this copy: 06758dbaaf6320a40a6a968dd86dde915989f165a6f522745f4866c83b242c94
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.55_Na2MnF5.mcif.