Research/Sitter/MAGNDATA / 1.1.159_GdCrO3.mcif

Gd₁Cr₁O₃

MAGNDATA entry 1.1.159 · 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 ≤ 2.4 K (−271 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P11(αβγ)0
Point group	11
Parent space group	P n m a No. 62
Repeats every	3.13 cells along b (not a whole number: that's what incommensurate means)
Propagation	[0.08 0.32 0] 1k
Cell	a 5.3045 · b 5.5203 · c 7.5929 Å · α 90° · β 90° · γ 90°
Transition	2.4 K (−271 °C)
Measured at	1.5 K
Magnetic ions	Cr, Gd
Largest moment component	4.7 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 P11(αβγ)0 →

Atom sites · 20 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Gd_1_1	Gd	−0.015	0.0588	0.25	0	1.07	0	1.07
Gd_1_2	Gd	0.015	−0.0588	0.75	0	1.07	0	1.07
Gd_2_1	Gd	0.515	0.5588	0.25	0	−1.07	0	1.07
Gd_2_2	Gd	−0.515	−0.5588	0.75	0	−1.07	0	1.07
Cr_1_1	Cr	0.5	0	0	1.641	0	1.92	2.5257
Cr_1_2	Cr	−0.5	0	0.5	−1.64	0	−1.92	2.5251
Cr_2_1	Cr	0	0.5	0.5	1.64	0	1.94	2.5403
Cr_2_2	Cr	0	−0.5	1	−1.64	0	−1.92	2.5251
O1_1_1	O	0.0956	0.4739	0.25
O1_1_2	O	−0.0956	−0.4739	0.75
O1_2_1	O	0.4044	−0.0261	0.25
O1_2_2	O	−0.4044	0.0261	0.75
O2_1_1	O	0.6991	0.298	0.0499
O2_1_2	O	−0.6991	−0.298	0.5499
O2_2_1	O	0.8009	0.798	0.4501
O2_2_2	O	−0.8009	−0.798	0.9501
O2_3_1	O	0.3009	0.702	−0.0499
O2_3_2	O	−0.3009	−0.702	0.4501
O2_4_1	O	0.1991	0.202	0.5499
O2_4_2	O	−0.1991	−0.202	1.0499

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

Pascal Manuel et al. Acta Cryst. B (2025) · doi:10.1107/S2052520625001921

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.159_GdCrO3.mcif from MAGNDATA · entry page

sha256 of this copy: 914f1d0ccee840b695c702c4872de798535141b0049816a9e76094d110a8f95d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.159_GdCrO3.mcif.

Gd1Cr1O3

Symmetry

Source

Original file

Gd₁Cr₁O₃