scholarly journals Rapid Assessment of Earthquake Source Characteristics

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Don Helmberger ◽  
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Shengji Wei
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pp. 1013-1030 ◽  
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Prosanta Kumar Khan ◽  
Md Afroz Ansari ◽  
S Mohanty

2012 ◽  
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pp. n/a-n/a ◽  
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Susan L. Bilek ◽  
Heather R. DeShon ◽  
E. Robert Engdahl

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Vol 26 (4) ◽  
pp. 1141-1141 ◽  
Author(s):  
Basil Margaris ◽  
George Athanasopoulos ◽  
George Mylonakis ◽  
Christos Papaioannou ◽  
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Chen Junhua ◽  
Shen Xuelin ◽  
Zhang Lifen ◽  
Zhao Lingyun ◽  
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ALCHEMI (Atom Location by CHannelling-Enhanced Microanalysis) is a TEM technique for determining site occupancies in single crystals. The method uses the channelling of incident electrons along specific crystallographic planes. This channelling results in enhanced x-ray emission from the atoms on those planes, thereby providing the required site-occupancy information. ALCHEMI has been applied with success to spinel, olivine and feldspar. For the garnets, which form a large group of important minerals and synthetic compounds, the channelling effect is weaker, and significant results are more difficult to obtain. It was found, however, that the channelling effect is pronounced for low-index zone-axis orientations, yielding a method for assessing site occupancies that is rapid and easy to perform.


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