Research/Sitter/MAGNDATA / 0.86_KMn4(PO4)3.mcif

KMn₄(PO₄)₃

MAGNDATA entry 0.86 · source

antiferromagnet

No net magnetisation, and up and down sublattices are related by a shift or by inversion, so the bands stay spin-degenerate: a conventional antiferromagnet.

Spin group ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 10 K (−263 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P n m a′ BNS 62.445
Point group	m′mm
Parent space group	P n a m No. 62
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 9.9851 · b 16.0498 · c 6.5584 Å · α 90° · β 90° · γ 90°
Transition	10 K (−263 °C)
Measured at	2 K
Magnetic ions	Mn
Largest moment component	4.57 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 m a′ →

Atom sites · 16 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
K1	K	0.2369	0.2832	0.25
Mn1	Mn	0.4685	0.8666	0.25	0	0	4.43	4.43
Mn2	Mn	0.0745	0.8749	0.25	0	0	−4.21	4.21
Mn3	Mn	0.2461	0.0505	0.0025	0	0	−4.57	4.57
P1	P	0.0244	0.4382	0.25
P2	P	0.448	0.4476	0.25
P3	P	0.2964	0.7226	0.25
O1	O	0.1163	0.5201	0.25
O2	O	0.3753	0.0265	0.25
O3	O	0.0505	0.3893	0.061
O4	O	0.1059	0.0521	0.25
O5	O	0.402	0.539	0.25
O6	O	0.3933	0.4077	0.0577
O7	O	0.2537	0.8149	0.25
O8	O	0.2447	0.6768	0.0587
O9	O	0.4482	0.7278	0.25

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

M. Lopez et al. Chem. Eur. J. (2008) · doi:10.1002/chem.200800763

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.86_KMn4(PO4)3.mcif from MAGNDATA · entry page

sha256 of this copy: ddda88d11b08eef2aab418cb31d66407287c68d1130e2012455cb67e56c49230
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.86_KMn4(PO4)3.mcif.