Research/Sitter/MAGNDATA / 0.87_NaFePO4.mcif

NaFePO₄

MAGNDATA entry 0.87 · 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 ≤ 50 K (−223 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P n m a′ BNS 62.445
Point group	m′mm
Parent space group	P n m a No. 62
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.4063 · b 6.2187 · c 4.9469 Å · α 90° · β 90° · γ 90°
Transition	50 K (−223 °C)
Measured at	3 K
Magnetic ions	Fe
Largest moment component	4.55 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 n m a′ →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Na1	Na	0	0	0
Fe1	Fe	0.213	0.25	0.4863	0	−4.55	0	4.55
P1	P	0.3917	0.25	0.9426
O1	O	0.386	0.25	0.2524
O2	O	0.0315	0.25	0.6611
O3	O	0.1755	0.9446	0.3118

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

M. Avdeev et al. Inorg. Chem. (2013) · doi:10.1021/ic400870x

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.87_NaFePO4.mcif from MAGNDATA · entry page

sha256 of this copy: bc0bffd62bda36108bdedb9b657e1939f7a7164f8506f2d99519915c0369e6b0
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.87_NaFePO4.mcif.