Artigo Acesso aberto Revisado por pares

Electron diffraction analysis of amorphous geological materials

2007; Wiley; Volume: 63; Issue: a1 Linguagem: Inglês

10.1107/s0108767307093749

ISSN

1600-5724

Autores

Viktória Kovács Kis, Mihály Pósfai, János L. Lábár, István Dódony,

Tópico(s)

Building materials and conservation

Resumo

There are minor differences between the chemical compositions of baratovite and berezanskite and their blocks in the crystal structure of faizievite.Baratovite, KLi 3 Ca 7 Ti 2 (Si 6 O 18 ) 2 (OH) 2 , and the baratovite block in faizievite, K 2 (Ca 6 Na)Li 6 Ti 4 (Si 6 O 18 ) 2 F 2 , are related by the substitution: VI Ca 2+ + (OH) - 2 ↔ VI Na + + F - 2 .Berezanskite, K IX L 3 Ti 2 (Si 12 O 30 ), and the berezanskite block in faizievite, KNaLi 3 Ti 2 (Si 12 O 30 , are related by the substitution: IX ↔ IX Na + .Therefore assembley of faizievite from baratovite and berezanskite components is accompanied by the following substitution: VI Ca 2+ + IX + (OH) - 2 ↔ VI Na + + IX Na + + F - 2 .

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