Nanostructure of palygorskite/sepiolite in Texas caliche: Possible bacterial origin

Autor:	Robert L. Folk, E. Troy Rasbury
Rok vydání:	2007
Předmět:	inorganic chemicals Calcite Nanostructure Sepiolite Caliche Mineralogy Palygorskite macromolecular substances complex mixtures chemistry.chemical_compound chemistry Geochemistry and Petrology medicine Clay minerals Geology medicine.drug
Zdroj:	Carbonates and Evaporites. 22:113-122
ISSN:	1878-5212 0891-2556
Popis:	In a caliche from west Texas, watermelon-shaped calcite crystals are coated with fibers of palygorskite/sepiolite clay, which also extend out into pore spaces as spiky filaments. Some filaments are smooth and capped by ovoid 30–100nm beads. Other filaments are made of rosary-like chains of beads. These objects are seen both in gold-coated and carbon-coated samples, thus are not artifacts. We suggest that these minute features were cells of nannobacteria (dwarf forms) that precipitated the clay filaments, in a similar manner as larger bacteria that accumulate clay minerals on their negatively-charged cell walls.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ad685e029f52edc9a7cb6844d353c4ae https://doi.org/10.1007/bf03176241 Zobrazit plný text záznamu Full text from SpringerLink