Research/Sitter/MAGNDATA / 1.75_BiMn2O5.mcif

BiMn₂O₅

MAGNDATA entry 1.75 · source

noncoplanar magnet

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

ordered ≤ 39 K (−234 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_a m BNS 8.36
Point group	m1′
Parent space group	P b a m No. 55
Spins	noncoplanar · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 15.1216 · b 8.533 · c 11.5213 Å · α 90° · β 90° · γ 90°
Transition	39 K (−234 °C)
Measured at	10 K
Magnetic ions	Mn
Largest moment component	2.83 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 C_a m →

Atom sites · 24 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Bi1_1	Bi	0.0799	0.1659	0
Bi1_2	Bi	0.9202	0.8341	0
Bi1_3	Bi	0.1701	0.6659	0
Bi1_4	Bi	0.3298	0.3341	0
Mn1_1	Mn	0	0.5	0.3694	2.1	−0.33	−0.25	2.1404
Mn1_2	Mn	0.25	0	0.1306	2.07	0.56	0.08	2.1459
Mn2_1	Mn	0.2037	0.3516	0.25	−2.83	0.33	0	2.8492
Mn2_2	Mn	0.2963	0.6484	0.25	2.8	−0.34	0	2.8206
Mn2_3	Mn	0.0463	0.8516	0.25	−2.83	−0.23	0	2.8393
Mn2_4	Mn	0.4537	0.1484	0.25	−2.74	−0.64	0	2.8138
O1_1	O	0	0	0.1433
O1_2	O	0.25	0.5	0.8567
O2_1	O	0.0776	0.444	0
O2_2	O	0.9224	0.556	0
O2_3	O	0.1724	0.944	0
O2_4	O	0.3276	0.056	0
O3_1	O	0.072	0.4241	0.25
O3_2	O	0.928	0.5759	0.25
O3_3	O	0.178	0.9241	0.25
O3_4	O	0.322	0.0759	0.25
O4_1	O	0.1928	0.1995	0.127
O4_2	O	0.8072	0.8005	0.127
O4_3	O	0.0572	0.6995	0.873
O4_4	O	0.4428	0.3005	0.873

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

C. Vecchini et al. PHYSICAL REVIEW B (2008) · doi:10.1103/physrevb.77.134434

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.75_BiMn2O5.mcif from MAGNDATA · entry page

sha256 of this copy: 3384c2938481adcbc13c5e9226c73fecb8d6312bbe56941b5f462c2d177ecda1
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.75_BiMn2O5.mcif.