Research/Sitter/MAGNDATA / 0.1129_Er2Be2GeO7.mcif

Er₂Be₂Ge₁O₇

MAGNDATA entry 0.1129 · source

noncoplanar ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 0.9 K (−272 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P 2₁ 2₁′ 2′ BNS 18.19
Point group	2′2′2
Parent space group	P 4 2₁ m No. 113
Spins	noncoplanar · net moment 8.12 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 7.377 · b 7.377 · c 4.777 Å · α 90° · β 90° · γ 90°
Transition	0.9 K (−272 °C)
Measured at	0.3 K
Magnetic ions	Er
Largest moment component	6.44 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 2₁ 2₁′ 2′ →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Er1	Er	0.3398	0.8418	0.5081	−2.03	−2.03	6.44	7.0509
Be1	Be	0.134	0.634	0.94
Ge1	Ge	0	0	0
O1	O	0	0.5	0.812
O2	O	0.145	0.645	0.28
O3_1	O	0.086	0.825	0.79
O3_2	O	0.825	0.914	0.21

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

PHYSICAL REVIEW X (2025) · doi:10.1103/9ynf-xx1t

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.1129_Er2Be2GeO7.mcif from MAGNDATA · entry page

sha256 of this copy: 1a1b164c9636c74642ec1a5bce61db0a58846c9ab320bc6d51880fee5a980d72
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.1129_Er2Be2GeO7.mcif.

Er2Be2Ge1O7

Symmetry

Source

Original file

Er₂Be₂Ge₁O₇