G225 - Earth Materials: Daily Lesson #6
The Neso-Silicates (Olivine, Garnet, Alumino-Silicates)
 
   
 

There is no new assignment for Thursday, seeing as we have not yet gotten to discuss the Neso-Silicates!!!!  Next new daily assignment will be posted on Thursday and due on Tuesday.

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The following three questions refer to the material you were to read in preparation to the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle.

You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT LESSON button at the bottom of this page. 

1. What is the most distinguishing structural characteristic of the neso-silicates.  That is to say, what do the mineral structures of olivine, garnet and alumino-silicate (Al2SiO5) all have in common?


 
 

2. Give the general formula for the garnet group and then describe all of the possible "substitutions" in the A-site and B-site respectively.

 


 
 

3.  How many polymorphs of the Al2SiO5 minerals are there?

 

   1

   2

   3

  4


 
 

Below is a space for your thoughts, including general comments about today's assignment (what seemed impossible, what reading didn't make sense, what we should spend class time on, what was "cool", etc.):


 
 

You may change your mind as often as you wish. When you are satisfied with your responses click the SUBMIT button.