Research/Sitter/MAGNDATA / 1.1.83_Rb2Mn3(MoO4)3(OH)2.mcif

Rb₂Mn₃(MoO₄)₃(OH)₂

MAGNDATA entry 1.1.83 · 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 ≤ 3.5 K (−270 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	Pn′ma(0β0)00s
Point group	m′mm
Parent space group	P n m a No. 62
Repeats every	2.17 cells along b (not a whole number: that's what incommensurate means)
Propagation	[0 0.46 0] 1k
Cell	a 18.6919 · b 6.2684 · c 12.6394 Å · α 90° · β 90° · γ 90°
Transition	3.5 K (−270 °C)
Measured at	1.5 K
Magnetic ions	Mn
Largest moment component	4.7 μ_B
Method	NSD

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 Pn′ma(0β0)00s →

Atom sites · 18 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Rb1	Rb	0.3697	−0.25	3.9661
Rb2	Rb	0.2543	0.75	0.6589
Mn1	Mn	0.5543	0.472	0.3157	−0.49	1.08	−3.53	3.7239
Mn2	Mn	0.3961	0.75	0.2622	0	−0.16	0	0.16
Mo1	Mo	0.4552	0.25	0.1134
Mo2	Mo	0.6036	0.75	0.5755
Mo3	Mo	0.2006	0.75	0.3196
O1	O	0.5081	0.25	0.207
O2	O	0.3892	0.035	0.142
O3	O	0.4946	0.25	−0.0138
O4	O	0.583	0.75	0.4327
O5	O	0.569	1.005	0.626
O6	O	0.7019	0.75	0.5817
O7	O	0.1536	0.557	0.2732
O8	O	0.2845	0.75	0.2704
O9	O	0.2046	0.75	0.461
O10	O	0.5142	0.75	0.2381
O11	O	0.5879	0.25	0.411

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

Y. Liu et al. PHYSICAL REVIEW B (2020) · doi:10.1103/PhysRevB.101.064423

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.1.83_Rb2Mn3(MoO4)3(OH)2.mcif from MAGNDATA · entry page

sha256 of this copy: 2871b9b49847b591962e3fee1f5a2281a9e140c0913d2d0bdd65017d09ce1edd
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.83_Rb2Mn3(MoO4)3(OH)2.mcif.