Optimizing electron backscatter diffraction of carbonate biominerals-resin type and carbon coating.
Microsc Microanal
; 15(3): 197-203, 2009 Jun.
Article
em En
| MEDLINE
| ID: mdl-19460175
ABSTRACT
Electron backscatter diffraction (EBSD) is becoming a widely used technique to determine crystallographic orientation in biogenic carbonates. Despite this use, there is little information available on preparation for the analysis of biogenic carbonates. EBSD data are compared for biogenic aragonite and calcite in the common blue mussel, Mytilus edulis, using different types of resin and thicknesses of carbon coating. Results indicate that carbonate biomineral samples provide better EBSD results if they are embedded in resin, particularly epoxy resin. A uniform layer of carbon of 2.5 nm thickness provides sufficient conductivity for EBSD analyses of such insulators to avoid charging without masking the diffracted signal. Diffraction intensity decreases with carbon coating thickness of 5 nm or more. This study demonstrates the importance of optimizing sample preparation for EBSD analyses of insulators such as carbonate biominerals.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Carbonato de Cálcio
/
Bivalves
/
Microscopia Eletrônica de Transmissão
Limite:
Animals
Idioma:
En
Revista:
Microsc Microanal
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Reino Unido