Onion morphology and microstru
- journal_title：American Mineralogist
- Contributor：Alain Baronnet ; Muriel Andréani ; Olivier Grauby ; Bertrand Devouard ; Serge Nitsche ; Damien Chaudanson
- Publisher：Mineralogical Society of America
- Date：2007-
- Format：text/html
- Language：en
- Identifier：10.2138/am.2007.2388
- journal_abbrev：American Mineralogist
- issn：0003-004X
- volume：92
- issue：4
- firstpage：687
- section：Letters
摘要
We describe the shape and internal structure of polyhedral spheroids found in serpentinized peri-dotites. Serpentine spheroids resemble geodesic domes made of ~160 to 180 triangular facets. At facet edges, the nested layers bend by ~14° along their three <010> crystallographic directions, resulting in an onion-like structure with lateral continuity of the layers. The stacking of the serpentine layers within sectors is controlled by interlayer bonding. These polyhedral onions correspond to a novel type of spherical nanostructure for layered materials.