Research/Sitter/MAGNDATA / 0.297_NaCrGe2O6.mcif

NaCrGe₂O₆

MAGNDATA entry 0.297 · source

s-wave ferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

Spin group ¹2/¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 6 K (−267 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C 2′/c′ BNS 15.89
Parent space group	C 2/c No. 15
Spins	collinear · net moment 7.4 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 9.9114 · b 8.8494 · c 5.455 Å · α 90° · β 107.5934° · γ 90°
Transition	6 K (−267 °C)
Measured at	1.8 K
Magnetic ions	Cr
Largest moment component	1.85 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 C 2′/c′ →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Na1	Na	0	0.3013	0.25
Cr1	Cr	0	0.91	0.25	0	0	1.85	1.85
Ge1	Ge	0.2907	0.0965	0.2279
O1	O	0.1052	0.0803	0.1286
O2	O	0.3596	0.2745	0.308
O3	O	0.3627	0.0118	0.0066

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

G. Nenert et al. PHYSICAL REVIEW B (2009) · doi:10.1103/PhysRevB.80.024402

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.297_NaCrGe2O6.mcif from MAGNDATA · entry page

sha256 of this copy: 6b7997b21c291f4184d273ed959f9ea5ce8a54281dbe2bd218c7d1c6a1e40cf3
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.297_NaCrGe2O6.mcif.