Ca₂CoSi₂O₇

MAGNDATA entry 0.175 · source

s-wave ferrimagnet

Opposite moments of different size leave a net magnetisation.

Spin group ¹2/¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 5.7 K (−267 °C)

Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

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 2₁2₁′2′ →

Atom sites · 55 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ca1	Ca	0.1086	0.0527	0.503
Ca2	Ca	0.1145	0.3923	0.49
Ca3	Ca	0.0554	0.2245	0.499
Ca4	Ca	0.2746	0.1114	0.515
Ca5	Ca	0.2677	0.4511	0.475
Ca6	Ca	0.2153	0.2664	0.519
Ca7	Ca	0.4409	0.0525	0.517
Ca8	Ca	0.4505	0.3973	0.516
Ca9	Ca	0.4028	0.2115	0.492
Co1	Co	0	0	0.001	2.79	−0.07	0	2.7909
Co2	Co	0.0066	0.3352	0.017	2.79	−0.07	0	2.7909
Co3	Co	0.1628	0.1636	−0.006	−2.79	−0.07	0	2.7909
Co4	Co	0.3336	0.0018	0.015	2.79	−0.07	0	2.7909
Co5	Co	0.334	0.3313	0.0017	2.79	−0.07	0	2.7909
Si1	Si	0.0418	0.1214	0.934
Si2	Si	0.0506	0.4568	0.92
Si3	Si	0.1241	0.2862	0.081
Si4	Si	0.2124	0.0411	0.071
Si5	Si	0.216	0.3812	0.032
Si6	Si	0.2827	0.2081	0.963
Si7	Si	0.3827	0.1234	0.944
Si8	Si	0.383	0.4549	0.935
Si9	Si	0.452	0.2811	0.056
O1	O	0.9917	0.1647	0.822
O2	O	0.174	0.9854	0.1742
O3	O	0.1797	0.3265	0.1724
O4	O	0.3401	0.1758	0.836
O5	O	0	0.5	0.795
O6	O	0.0423	0.1183	0.245
O7	O	0.0505	0.4582	0.2354
O8	O	0.1247	0.2822	0.751
O9	O	0.2165	0.0436	0.754
O10	O	0.208	0.3847	0.722
O11	O	0.2776	0.2032	0.2738
O12	O	0.3863	0.1209	0.258
O13	O	0.3862	0.4584	0.263
O14	O	0.4624	0.276	0.7443
O15	O	0.025	0.062	0.771
O16	O	0.0986	0.1435	0.773
O17	O	0.0342	0.3955	0.777
O18	O	0.1039	0.4798	0.7535
O19	O	0.1388	0.2266	0.2249
O20	O	0.0711	0.3125	0.2239
O21	O	0.1826	0.0953	0.2239
O22	O	0.2713	0.0301	0.23
O23	O	0.1864	0.4357	0.2064
O24	O	0.2779	0.3794	0.1706
O25	O	0.287	0.2728	0.8338
O26	O	0.2301	0.1799	0.7953
O27	O	0.3562	0.0674	0.7915
O28	O	0.4403	0.1371	0.7877
O29	O	0.3809	0.3879	0.831
O30	O	0.435	0.4821	0.782
O31	O	0.4841	0.2276	0.2185
O32	O	0.3918	0.2831	0.1809

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.

Magnetic group	P 2₁2₁′2′ BNS 18.19
Parent space group	P 4 2₁ m No. 113
Spins	collinear · net moment 1.26 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 23.52 · b 23.52 · c 5.03 Å · α 90° · β 90° · γ 90°
Transition	5.7 K (−267 °C)
Measured at	2.5 K
Magnetic ions	Co
Largest moment component	2.79 μ_B
Method	Single crystal ND

Ca₂CoSi₂O₇

Symmetry

Source

Original file

Ca2CoSi2O7

Symmetry

Source

Original file

Ca₂CoSi₂O₇