Research/Sitter/MAGNDATA / 1.866_Na2Co3(AsO4)2(OH)2.mcif

Na₂Co₃As₂O₁₀H₂

MAGNDATA entry 1.866 · source

noncollinear antiferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

ordered ≤ 14 K (−259 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_s 1 BNS 2.7
Point group	11′
Parent space group	C 2/m No. 12
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/2 1/2 1/2] 1k
Cell	a 29.167 · b 11.876 · c 10.179 Å · α 90° · β 103.47° · γ 90°
Transition	14 K (−259 °C)
Measured at	1.5 K
Magnetic ions	Co
Largest moment component	3.01 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_s 1 →

Atom sites · 10 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0	0.25	0	2.51	−0.27	−3.01	4.3535
Co2	Co	0	0.116	0.25	0.51	2.83	0.16	2.8734
As1	As	0.4366	0	0.456
Na1	Na	0.1362	0	0.3528
O1	O	0.2844	0	0.3505
H1	H	0.3174	0	0.3695
O2	O	0.4531	0	0.1197
O3_1	O	0.2067	0.1308	0.3917
O3_2	O	0.7933	0.1308	0.6082
O4	O	0.378	0	0.4062

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

Duminda S. Liurukara et al. Mater. Chem. Front. (2026) · doi:10.1039/d5qm00922g

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.866_Na2Co3(AsO4)2(OH)2.mcif from MAGNDATA · entry page

sha256 of this copy: c853b0a1eb34edc3d30771b81a9ed87612b0be672c17ab67b6609ccf2c0dfd0c
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.866_Na2Co3(AsO4)2(OH)2.mcif.

Na2Co3As2O10H2

Symmetry

Source

Original file

Na₂Co₃As₂O₁₀H₂