Mindat Logo
bannerbannerbannerbanner
Welcome!

Advanced

Piemontite formula

Posted by ruth raubenheimer  
Piemontite formula
July 02, 2009 07:08AM
Could somebody explain to me how to interpret the chemical formula. What is the meaning of the different sort of brackets? And the vertical lines?
avatar Re: Piemontite formula
July 02, 2009 02:28PM
us    
Hello Ruth, I don't know what is going on with that formula either; but I believe you can think of any of the brackets as being just a form of parentheses and the verticle line/bar as a comma.
Re: Piemontite formula
July 03, 2009 02:20AM
us    
Nope.This, [O|OH|SiO4|Si2O7]2 , is the Strunz classification variation,
and is the same as (SiO4)(Si2O7)2O(OH). Brackets [] or parens ( ) are interchangeable in most formulae.

Persnally, I don't really like this format for writing a mineral composition. Take a look at the IMA Mineral List on the IMA website for the perferred method.
avatar Re: Piemontite formula
July 03, 2009 01:51PM
us    
Thanks, Jim. I was not familiar with the Strunz system. I prefer the IMA version, also.
Author:

Your Email:


Subject:


Attachments:
  • Valid attachments: jpg, gif, png, pdf
  • No file can be larger than 1000 KB
  • 3 more file(s) can be attached to this message

Message:

Mineral and/or Locality
Google
 
www.mindat.org Web
Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 28th Nov 2009 10:04:27