Research/Sitter/MAGNDATA / 1.1.131_Ce5TeO8.mcif

Ce₅TeO₈

MAGNDATA entry 1.1.131 · source

incommensurate spiral

Incommensurate: the magnetic pattern repeats every so many cells, but not a whole number of them, so it never lines up with the crystal lattice. Here it's a spiral: the spin direction rotates as you move along.

ordered ≤ 27 K (−246 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P4₃(0,0,γ)0
Point group	4
Parent space group	P 4₃ 3 2 No. 212
Repeats every	7.43 cells along c (not a whole number: that's what incommensurate means)
Propagation	[0 0 0.1345] 1k
Cell	a 8.54979 · b 8.54979 · c 8.54979 Å · α 90° · β 90° · γ 90°
Transition	27 K (−246 °C)
Measured at	1.7 K
Magnetic ions	Co
Largest moment component	157 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 P4₃(0,0,γ)0 →

Atom sites · 14 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1_1	Co	0.0006	−0.0006	0.0006	0	0	−2.59	2.59
Co1_2	Co	0.5006	0.0006	0.4994	0	0	−2.59	2.59
Co2_1	Co	0.125	0.137	0.387	0	0	3.28	3.28
Co2_2	Co	0.625	0.863	0.113	0	0	3.28	3.28
Co2_3	Co	0.863	0.613	0.125	0	0	3.28	3.28
Te_1	Te	0.625	0.375	0.625
O1_1	O	0.3789	0.6211	0.3789
O1_2	O	0.8789	0.3789	0.1211
O2_1	O	0.3518	0.6268	0.8659
O2_2	O	0.8518	0.3732	0.6341
O2_3	O	0.8659	0.6482	0.3732
O2_4	O	0.3659	0.3518	0.1268
O2_5	O	0.3732	0.1341	0.3518
O2_6	O	0.8732	0.8659	0.1482

Incommensurate: the moments are modulated; the picture evaluates each atom's Fourier series at its own phase.

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

S. Podchezertsev et al. Inorg. Chem. (2021) · doi:10.1021/acs.inorgchem.1c01131

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.131_Ce5TeO8.mcif from MAGNDATA · entry page

sha256 of this copy: 34c9fcbea1d2c5fa4e63aca72772c6913750d1477f41e307fe092358db576e6a
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.131_Ce5TeO8.mcif.