In:
Acta Crystallographica Section B Structural Science, International Union of Crystallography (IUCr), Vol. 57, No. 3 ( 2001-06-01), p. 271-277
Abstract:
The crystal structure of the commensurate phase of Ca 2 CoSi 2 O 7 , dicalcium cobalt disilicate, has been derived from the modulated structure described in (3 + 2)-dimensional space. The structure is orthorhombic P 2 1 2 1 2; a = 23.510 (4), b = 23.510 (4), c = 5.025 (1) Å (at 170 K), Z = 18. Since the crystal is twinned and the apparent diffraction symmetry is 4/ mmm , the parameters were refined by a newly developed least-squares program for the refinement of twinned crystals. The structure is essentially similar to the known structure of the melilite group, but with regular arrangement of the bundles along [001] formed with four arrays of the sixfold coordinated Ca polyhedra and an array of CoO 4 tetrahedra. The distribution of the bundles found in the present structure is different from that reported by Riester et al. [(2000), Z. Kristallogr. 215 , 102–109].
Type of Medium:
Online Resource
ISSN:
0108-7681
DOI:
10.1107/S010876810100101X
DOI:
10.1107/S010876810100101X/sn0009sup1.cif
DOI:
10.1107/S010876810100101X/sn0009sup2.hkl
DOI:
10.1107/S010876810100101X/sn0009sup3.pdf
Language:
Unknown
Publisher:
International Union of Crystallography (IUCr)
Publication Date:
2001
detail.hit.zdb_id:
2020841-8
SSG:
13
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