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Fresnoite: unusal titanium coordination |
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| Authors: | Moore P B Louisnathan J |
| Abstract: | The crystal structure of fresnoite, Ba(2)(TiO)Si(2)O(7)], consists of Si(2)O(7)](6-) double groups and titanium-centered square pyramids linked to form flat sheets. Intercalated between these sheets are Ba(2+) ions in highly distorted pentagonal antiprisms. The structure of fresnoite is related to that of melilite, (Ca,Na)(2)(Mg,AlSi(2)(7)]. |
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