Chemistry, morphology and structural characteristics of synthetic Al-lizardite
| Autor: | María Bentabol, I. Sobrados, M. D. Ruiz Cruz |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
education.field_of_study
Stereochemistry Chemistry Population Amesite Space group 020101 civil engineering 02 engineering and technology engineering.material 010502 geochemistry & geophysics 01 natural sciences Hydrothermal circulation 0201 civil engineering Crystallography Geochemistry and Petrology Transmission electron microscopy Formula unit X-ray crystallography engineering Hydrothermal synthesis education 0105 earth and related environmental sciences |
| Zdroj: | Clay Minerals. 45:131-143 |
| ISSN: | 1471-8030 0009-8558 |
| DOI: | 10.1180/claymin.2010.045.2.131 |
| Popis: | Al-lizardite has been synthesized under hydrothermal conditions (200ºC). Morphologically, Al-lizardite consists of thin platy particles ~400 Å wide and ~150 Å thick. Structurally, the X-ray diffraction patterns indicate that the 2H2 polytype is dominant, with cell parameters: a = 5.311(0.006) Å; c = 14.333 (0.013) Å and space group P63. High-resolution transmission electron microscopy images revealed, however, the presence of other polytypes and abundant stacking disorder. Chemically, Al-lizardite consists of a single population with average tetrahedral composition Si1.74Al0.26. In contrast to previously described Al-rich serpentines (amesite and Al-lizardite), this Al-lizardite is characterized by an asymmetrical Al distribution, with VIAl ≈0.70 and IVAl ≈0.25 atoms per formula unit. |
| Databáze: | OpenAIRE |
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