Mineralogy

[kappage]

Hey guys, long time no post. Ive been super busy at University doing my degree and work. I have to choose an elective that is not even relevant to my course at which i am need of some help with it.

I was wondering if you could point me in the right direction as to how to do it. Ive gone over the lecture notes but hes just given us an example with no actual formula. For question one.

And for question 2 i was wondering if that is just an empirical formula calculation? I gave it a crack treating it like an empirical formula but it came up with some wacky numbers.....

Thanks for your help!

http://imageshack.us/photo/my-images/25 ... ge001.jpg/
http://imageshack.us/photo/my-images/85 ... ge002.jpg/
http://imageshack.us/photo/my-images/54 ... ge003.jpg/