Alg

I am typing up a list of mineral compositions for my boss and in one of the compositions for Stilbite, it includes Alg......what does the subscripted g stand for???

[hwguy]

the chemical formula for the mineral in question is NaCa2Al5Si13O36·14H2O i think you have mistaken the AL5 for Alg.

Originally Posted by hwguy

the chemical formula for the mineral in question is NaCa2Al5Si13O36·14H2O i think you have mistaken the AL5 for Alg.

Hi there, thank you for your response. Here is the actual formula I was given by my boss and he is quite the mineral collector....he assured me that it was Alg and I asked him what the 'g' stood for and he said some value, but wasn't sure....here is the formula I have and it is for a Scolectite and Stillbite mineral from Nasik, India. CaAl2Si3O10 ∙ 3H20
NaCa4 (Si27 Alg) O72 ∙ 30H20 Please let me know what you think.

Thx.

[Borek]

It is not letter g, it is digit 9.

Originally Posted by Borek

It is not letter g, it is digit 9.

Ok, so how did you figure that out and how can I prove it to him???

[Borek]

Google stillbite formula, 4th link (to a pdf file).