Research/Sitter/MAGNDATA / 0.425_Na2CoP2O7.mcif

Na₂CoP₂O₇

MAGNDATA entry 0.425 · 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 ≤ 6.5 K (−267 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P n′ a 2₁′ BNS 33.146
Parent space group	P n a 2₁ No. 33
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 15.3758 · b 10.2393 · c 7.687 Å · α 90° · β 90° · γ 90°
Transition	6.5 K (−267 °C)
Measured at	3 K
Magnetic ions	Co
Largest moment component	2.71 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 n′ a 2₁′ →

Atom sites · 24 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0.132	0.507	0.476	1.09	0	−2.71	2.921
Co2	Co	0.1262	0.014	0.435	1.09	0	2.71	2.921
P1	P	0.1902	0.0709	0.092
P2	P	0.0611	0.0526	0.8038
P3	P	0.0542	0.4646	0.8512
P4	P	0.1956	0.4798	0.0963
Na1	Na	0.301	0.2714	0.297
Na2	Na	0.9384	0.2335	0.598
Na3	Na	0.2305	0.2821	0.763
Na4	Na	0.0108	0.2408	0.124
O1	O	0.1393	0.1037	0.9191
O2	O	0.135	0.1228	0.2424
O3	O	0.2826	0.1121	0.1
O4	O	0.1837	0.9232	0.1095
O5	O	0.0731	0.9072	0.814
O6	O	0.0757	0.1224	0.6286
O7	O	0.9871	0.1096	0.9127
O8	O	0.1068	0.4267	0.0167
O9	O	0.9667	0.3937	0.8641
O10	O	0.0433	0.609	0.843
O11	O	0.0929	0.4078	0.6878
O12	O	0.1892	0.4233	0.2782
O13	O	0.2717	0.4163	0.0034
O14	O	0.1941	0.6279	0.092

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. Barpanda et al. Inorg. Chem. (2013) · doi:10.1021/ic302191d

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.425_Na2CoP2O7.mcif from MAGNDATA · entry page

sha256 of this copy: 74571ea6960285997df8125cae0e4125e9397459ec21f6af6783af070dc4e719
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.425_Na2CoP2O7.mcif.