Mn₅P₄O₂₀D₁₀

MAGNDATA entry 1.1.134 · 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 ≤ 1.9 K (−271 °C)

Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

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 P2₁/c1′(α,0,γ)00s →

Atom sites · 39 sites · CSV

site	element	x	y	z
Mn1	Mn	0.7272	0.852	0.745
Mn2_1	Mn	0.4267	0.662	0.289
Mn2_2	Mn	0.9369	0.134	0.337
Mn3_1	Mn	0.428	0.253	0.374
Mn3_2	Mn	0.9197	0.788	0.353
P1_1	P	0.3334	0.451	0.09
P1_2	P	0.8298	0.935	0.083
P2_1	P	0.5915	0.489	0.383
P2_2	P	0.0888	0.984	0.364
O1_1	O	0.2674	0.54	0.087
O1_2	O	0.7528	0.032	0.077
O2_1	O	0.3222	0.313	0.205
O2_2	O	0.8351	0.834	0.195
O3_1	O	0.4132	0.51	0.135
O3_2	O	0.901	0.031	0.129
O4_1	O	0.6631	0.631	0.056
O4_2	O	0.1688	0.148	0.063
O5_1	O	0.4188	0.491	0.467
O5_2	O	0.9138	0.98	0.467
O6_1	O	0.5509	0.35	0.33
O6_2	O	0.0454	0.845	0.335
O7_1	O	0.5495	0.609	0.29
O7_2	O	0.0466	0.128	0.281
O8_1	O	0.679	0.481	0.338
O8_2	O	0.1714	0.989	0.355
O9_1	O	0.5082	0.319	0.024
O9_2	O	0.0133	0.832	0.037
O10_1	O	0.668	0.276	0.149
O10_2	O	0.1757	0.742	0.137
D1_1	D	0.2244	0.518	−0.0023
D1_2	D	0.7264	0.026	−0.023
D2_1	D	0.5398	0.39	−0.0221
D2_2	D	0.0548	0.871	−0.023
D3_1	D	0.48	0.413	0.081
D3_2	D	0.9921	0.891	0.085
D4_1	D	0.708	0.214	0.133
D4_2	D	0.2265	0.691	0.141
D5_1	D	0.683	0.362	0.2312
D5_2	D	0.1832	0.821	0.1997

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.

Original file

sha256 of this copy: 4b3d5e3f065d9aa6801ae3c192663813f1836d1f4dde2e199724e5ac1af1316f
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.1.134_Mn5(PO4)2(PO3(OH))2(HOH)4.mcif.

Magnetic group	P2₁/c1′(α,0,γ)00s
Point group	2/m1′
Parent space group	C 2/c No. 15
Repeats every	1.92 cells along a (not a whole number: that's what incommensurate means)
Propagation	[0.522 0 0.055] 1k
Cell	a 17.5715 · b 9.1185 · c 9.4931 Å · α 90° · β 96.391° · γ 90°
Transition	1.86 K (−271 °C)
Measured at	1.5 K
Magnetic ions	Mn
Largest moment component	7 μ_B
Method	NPD

Mn5P4O20D10

Symmetry

Source

Original file

Mn₅P₄O₂₀D₁₀