Research/Sitter/MAGNDATA / 1.279_Ho2Cu2O5.mcif

Ho₂Cu₂O₅

MAGNDATA entry 1.279 · source

noncoplanar magnet

Spins pointing in three dimensions, not confined to a plane.

ordered ≤ 13 K (−260 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_a 2₁ BNS 4.10
Parent space group	P n a 2₁ No. 33
Spins	noncoplanar · net moment 0 μ_B per cell
Propagation	[0 1/2 0] 1k
Cell	a 10.8096 · b 6.9924 · c 12.4735 Å · α 90° · β 90° · γ 90°
Transition	13 K (−260 °C)
Measured at	1.5 K
Magnetic ions	Cu, Ho
Largest moment component	7.8 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_a 2₁ →

Atom sites · 18 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1_1	Ho	0.208	0.1135	0	−4.4	1	7.8	9.0111
Ho1_2	Ho	0.708	0.1365	0	4.4	1	−7.8	9.0111
Ho2_1	Ho	0.0424	0.113	0.3303	−4.4	−1	7.8	9.0111
Ho2_2	Ho	0.5424	0.137	0.3303	4.4	−1	−7.8	9.0111
Cu1_1	Cu	0.9902	0.331	0.115	−0.8	0	0	0.8
Cu1_2	Cu	0.4902	0.919	0.115	0.8	0	0	0.8
Cu2_1	Cu	0.261	0.332	0.217	−0.8	0	0	0.8
Cu2_2	Cu	0.761	0.918	0.217	0.8	0	0	0.8
O1_1	O	0.173	0.363	0.359
O1_2	O	0.673	0.887	0.359
O2_1	O	0.324	0.356	0.066
O2_2	O	0.824	0.894	0.066
O3_1	O	0.124	0.16	0.169
O3_2	O	0.624	0.09	0.169
O4_1	O	0.427	0.388	0.263
O4_2	O	0.927	0.862	0.263
O5_1	O	0.426	0.115	0.479
O5_2	O	0.926	0.135	0.479

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

J.L. Garcia-Muoz et al. Phys. Rev. B (1991) · doi:10.1103/PhysRevB.44.4716

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.279_Ho2Cu2O5.mcif from MAGNDATA · entry page

sha256 of this copy: 8216c82447637fcbc8dfec7e6b668ed499e290fdf3a353fa627537e004c443a2
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.279_Ho2Cu2O5.mcif.