Research/Sitter/MAGNDATA / 0.136_Co3B7O13Br.mcif

Co₃B₇O₁₃Br

MAGNDATA entry 0.136 · source

noncoplanar magnet

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

ordered ≤ 17.5 K (−256 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P c′ a 2₁′ BNS 29.101
Point group	m′m2′
Parent space group	P c a 2₁ No. 29
Spins	noncoplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 8.542 · b 8.573 · c 12.09 Å · α 90° · β 90° · γ 90°
Transition	17.5 K (−256 °C)
Measured at	1.5 K
Magnetic ions	Co
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 P c′ a 2₁′ →

Atom sites · 24 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0.7588	0.252	0.2289	4.7	0	0	4.7
Co2	Co	0.4882	0.5254	0.5012	0	1.6	−3.7	4.0311
Co3	Co	0.9893	0.0252	0.5027	0	−1.6	0.6	1.7088
Br1	Br	0.7643	0.2494	0.5087
B1	B	0.4993	0.499	0.2502
B2	B	0.2568	0.248	0.4975
B3	B	0.999	0.997	0.251
B4	B	0.4517	0.251	0.3499
B5	B	0.2478	0.402	0.1717
B6	B	0.905	0.749	0.8233
B7	B	0.7525	0.903	0.6723
O1	O	0.2329	0.2501	0.2425
O2	O	0.5415	0.3295	0.2749
O3	O	0.3794	0.3292	0.4338
O4	O	0.9682	0.164	0.2693
O5	O	0.3224	0.3625	0.0654
O6	O	0.1685	0.973	0.2308
O7	O	0.1394	0.1724	0.4265
O8	O	0.334	0.5195	0.2296
O9	O	0.1705	0.1271	0.065
O10	O	0.9512	0.5914	0.8455
O11	O	0.5414	0.911	0.8528
O12	O	0.9111	0.5421	0.6502
O13	O	0.5893	0.9415	0.6554

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

P. Schobinger-papamantellos et al. Ferroelectrics (1994) · doi:10.1080/00150199408245095

Cite the original paper and MAGNDATA, not this mirror.

Mirror note

re-encoded from Mac OS Roman to UTF-8. Differs from the Bilbao original.

Original file

⬇ 0.136_Co3B7O13Br.mcif from MAGNDATA · entry page

sha256 of this copy: 701f850e901abbd88607e9dd4e699c4140a395e621b55b122e83273642872b22
This copy was altered (see the mirror note above), so the original will hash differently.