ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

ChemInform Abstract

Single crystals of the title compound are obtained as byproduct in the synthesis of La₂Te(SiO₄) by reaction of La, TeO₂, and SiO₂ in a CsCl flux (evacuated quartz tube, 950 °C, 7 d). La₂Si₂O₇ crystallizes in the monoclinic space group P2₁/c with Z = 12. The structure consists of alternating layers of SiO₄^4- anions and horseshoe-shaped Si₄O₁₃^10- catena-tetrasilicate ions. The highly coordinated La³⁺ cations (CN = 9—11) are located within and between these layers. The structure is compared with those of other catena-tetrasilicates and structural relationships to borosilicates of type Ln₃[BSiO₆][SiO₄] are discussed.

References

Volume33, Issue24

June 18, 2002

ChemInform Abstract: I-Type La₂Si₂O₇: According to La₆[Si₄O₁₃][SiO₄]₂ not a Real Lanthanum Disilicate.

Abstract