Layered titanosilicates – A review and some results on the hydrothermal synthesis of bafertisite
Articolo
Data di Pubblicazione:
2008
Abstract:
Heterophyllosilicates are titanosilicate minerals based on layers which, via a periodic substitution of rows of Si-tetrahedra by rows of
Ti-polyhedra, can be formally derived from the tetrahedral–octahedral–tetrahedral (TOT) layer of phyllosilicates. According to the periodicity
of the substitution, three types of HOH layers (H to indicate the hetero substitution) are known: bafertisite-, astrophyllite- and
nafertisite-type. Based on parallelism between the crystal structures of heterophyllosilicates and phyllosilicates, the paper aims to draw
the attention of materials scientists on a possible use of bafertisite-type compounds to produce layered materials of technological interest.
Some preliminary results on the hydrothermal synthesis of bafertisite are presented. By EDS electron-microprobe chemical analysis, optical
and electron microscopy, and X-ray powder diffraction, a minor presence of bafertisite has been established in a mixture of synthesis
products that include gillespite and fresnoite.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Layered titanosilicates; hydrothermal synthesis; crystallography; mineralogy; heterophyllosilicates; polysomatic series
Elenco autori:
Ferraris G.; Bloise A.; Cadoni M.
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