Research/Sitter/MAGNDATA / 0.516_BaMg2Fe16O27.mcif

BaMg₂Fe₁₆O₂₇

MAGNDATA entry 0.516 · source

s-wave ferrimagnet

Opposite moments of different size leave a net magnetisation.

Spin group ¹6/¹m¹m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 452 K (179 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 6₃/m m′ c′ BNS 194.270
Parent space group	P 6₃/m m c No. 194
Spins	collinear · net moment 44.8 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.892 · b 5.892 · c 32.85 Å · α 90° · β 90° · γ 120°
Transition	452 K (179 °C)
Measured at	4.2 K
Magnetic ions	Fe
Largest moment component	5 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 6₃/m m′ c′ →

Atom sites · 19 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ba1	Ba	0	0	0.25
Fe1	Fe	0.3333	0.6667	0.75	0	0	3.8	3.8
Fe2	Fe	0.3333	0.6667	0.5746	0	0	4.1	4.1
Mg1	Mg	0.3333	0.6667	0.5746
Fe3	Fe	0.5	0	0	0	0	3	3
Mg2	Mg	0.5	0	0
Fe4	Fe	0	0	0.0558	0	0	−4.1	4.1
Mg3	Mg	0	0	0.0558
Fe5	Fe	0.3333	0.6667	0.0933	0	0	−4	4
Mg4	Mg	0.3333	0.6667	0.0933
Fe6	Fe	0.3333	0.6667	0.2082	0	0	−5	5
Fe7	Fe	0.8362	0.6724	0.1495	0	0	4.6	4.6
O1	O	0	0	0.116
O2	O	0.3333	0.6667	0.0317
O3	O	0.3333	0.6667	0.673
O4	O	0.489	0.978	0.25
O5	O	0.503	0.006	0.1096
O6	O	0.825	0.65	0.0371
O7	O	0.164	0.328	0.182

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

A. Collomb et al. Journal of Magnetism and Magnetic Materials (1986) · doi:10.1016/0304-8853(86)90734-1

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.516_BaMg2Fe16O27.mcif from MAGNDATA · entry page

sha256 of this copy: 554cd7b90fcfc1385118784780127190ba45fbda04abdf35ef528c55b1bfa0d4
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.516_BaMg2Fe16O27.mcif.