Research/Sitter/MAGNDATA / 1.632_ErFe6Ge6.mcif

ErFe₆Ge₆

MAGNDATA entry 1.632 · 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 ≤ 470 K (197 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_I n n n BNS 48.264
Point group	mmm1′
Parent space group	I m m m No. 71
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1 1 1] 1k
Cell	a 8.0991 · b 26.5293 · c 5.1072 Å · α 90° · β 90° · γ 90°
Transition	470 K (197 °C)
Measured at	293 K
Magnetic ions	Er, Fe
Largest moment component	1.35 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_I n n n →

Atom sites · 18 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0	0	0
Er2	Er	0	0.1677	0.5
Er3	Er	0	0.5	0.5
Er4	Er	0	0.6677	0
Ge1	Ge	0.3592	0	0
Ge2	Ge	0.8592	0.6677	0
Ge3	Ge	0.815	0	0
Ge4	Ge	0.315	0.6677	0
Ge5	Ge	0	0.057	0.5
Ge6	Ge	0	0.557	0
Ge7	Ge	0	0.114	0
Ge8	Ge	0	0.614	0.5
Ge9	Ge	0	0.228	0
Ge10	Ge	0	0.728	0.5
Fe1	Fe	0.7557	0.5	0	−1.35	0	0	1.35
Fe2	Fe	0.25	0.25	0.25	1.35	0	0	1.35
Fe3	Fe	0.7557	0.832	0	−1.35	0	0	1.35
Fe4	Fe	0.2557	0.083	0.251	1.35	0	0	1.35

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

O. Oleksyn et al. Journal of Alloys and Compounds (1997) · doi:10.1016/S0925-8388(96)03125-8

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.632_ErFe6Ge6.mcif from MAGNDATA · entry page

sha256 of this copy: 24e71988eb0852e1612970bad07f9764543dc2e8cae59ba262d04c271906b8d7
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.632_ErFe6Ge6.mcif.