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silicon diamond 5.43 Å unit cell 8 atoms 1 cm3 1 ppm P mass

by 영원파란 2022. 12. 27.

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silicon diamond 5.43 Å unit cell 8 atoms 1 cm3 1 ppm P mass

 

 

Silicon has the diamond structure

with a unit cell edge length of 5.43 Å

and eight atoms per unit cell.

a) How many silicon atoms are there in 1 cm3 of material?

b) Suppose you dope that

1 cm3 sample of silicon with 1 ppm of phosphorus

that will increase the conductivity by a factor of a million.

How many milligrams of phosphorus are required?

 

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