Research/Sitter/MAGNDATA / 1.867_Ba6Nd2Fe4O15.mcif

Ba₆Nd₂Fe₄O₁₅

MAGNDATA entry 1.867 · 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 ≤ 17 K (−256 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_C m c 2₁ BNS 26.76
Point group	mm21′
Parent space group	P 6₃ m c No. 186
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 0] 1k
Cell	a 23.6232 · b 11.8116 · c 7.0222 Å · α 90° · β 90° · γ 120°
Transition	17 K (−256 °C)
Measured at	3.3 K
Magnetic ions	Fe, Nd
Largest moment component	3.88 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 c 2₁ →

Atom sites · 20 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ba1	Ba	0	0	0
Ba2	Ba	0.1667	0.6667	0.4827
Ba3_1	Ba	0.0868	0.8263	0.1609
Ba3_2	Ba	0.8263	0.8263	0.1609
Ba4_1	Ba	0.2395	0.521	0.8291
Ba4_2	Ba	0.521	0.521	0.8291
Nd1_1	Nd	0.2395	0.521	0.8291	0	−1.42	0	1.42
Nd1_2	Nd	0.521	0.521	0.8291	0	1.42	0	1.42
Fe1	Fe	0.1667	0.6667	0.0155	0	3.14	0	3.14
Fe2_1	Fe	0.0886	0.8229	0.66	0	−3.88	0	3.88
Fe2_2	Fe	0.8229	0.8229	0.66	0	3.88	0	3.88
O1_1	O	0.3371	0.0659	0.0214
O1_2	O	0.967	0.6083	0.0214
O1_3	O	0.6958	0.3258	0.0214
O2_1	O	0.1252	0.7497	0.8357
O2_2	O	0.7497	0.7497	0.8357
O3_1	O	0.2075	0.585	0.1665
O3_2	O	0.585	0.585	0.1665
O4_1	O	0.4508	0.0984	0.2688
O4_2	O	0.0984	0.0984	0.2688

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

Y. K. Lin et al. PHYSICAL REVIEW MATERIALS (2025) · doi:10.1103/rqpb-qwkp

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.867_Ba6Nd2Fe4O15.mcif from MAGNDATA · entry page

sha256 of this copy: 466cb02fdc1c3f5a67173069b35a86faff1b88ef3d68fc462fa7f8a2d9419a52
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.867_Ba6Nd2Fe4O15.mcif.