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2004
Structure
D 2000
52- 009
Ca[Si2O2N2] — A Novel Layer Silicate. — Colorless lath-shaped single crystals of
the title compound are synthesized by reaction of CaCO3 with Si3N4 at 1580 °C in a
radio frequency furnace. As revealed by single crystal XRD, Ca[Si2O2N2] crystallizes
in the monoclinic space group P21 with Z = 12. The compound is a layer silicate composed of SiON3 tetrahedra. Every N atom links three neighboring Si tetrahedral centers,
whereas the O atoms are exclusively bonded terminally to Si atoms. — (HOEPPE, H.
A.; STADLER, F.; OECKLER, O.; SCHNICK*, W.; Angew. Chem., Int. Ed. 43
(2004) 41, 5540-5542; Fachbereich Chem., Ludwig-Maximilians-Univ.,
D-81377 Muenchen, Germany; Eng.) — W. Pewestorf
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