Document Detail

Pressure-induced amorphization in mayenite (12CaO[middle dot]7Al(2)O(3)).
MedLine Citation:
PMID:  21913774     Owner:  NLM     Status:  In-Data-Review    
We report a joint experimental and theoretical study on high pressure structures of nanoporous mayenite (12CaO[middle dot]7Al(2)O(3)). A pressure-induced amorphization was identified at ∼13 GPa by in situ high pressure x-ray experiments. The amorphous product can be decompressed to ambient conditions. Ab initio calculations reveal that the anisotropic deformations of empty cages break the crystallographic long-range orders, leading to the formation of high-pressure amorphous state. Furthermore, the deformation routes of empty cages are found fully dependent on their individual locally structural geometry relevant to the distribution of extra-framework oxygen ions.
Xinxin Zhang; Yanchao Wang; Hui Wang; Qiliang Cui; Chengxin Wang; Yanming Ma; Guangtian Zou
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of chemical physics     Volume:  135     ISSN:  1089-7690     ISO Abbreviation:  J Chem Phys     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-09-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375360     Medline TA:  J Chem Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  094506     Citation Subset:  IM    
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, People's Republic of ChinaState Key Laboratory of Optoelectronic Materials and Technologies, Institute of Optoelectronic and Functional Composite Materials, School of Physics Science and Engineering, Zhongshan (Sun Yat Sen) University, Guangzhou 510275, People's Republic of China.
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