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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: Yoritomo on February 20, 2017, 10:00:06 AM

Title: Silicate reactivity
Post by: Yoritomo on February 20, 2017, 10:00:06 AM

Hello!

  I hope I'm posting this in the correct forum,so I would like to kindly ask the admin(s) to add it to another category,if needed.

  Will silicates (silicate minerals ) react with bases or other substances?

  Please try to answer as detailed as possible: There are several categories of silicates and several bases.

   Thanks a lot in advance!Any help would be VERY appreciated!

     -Kostas.

Title: Re: Silicate reactivity
Post by: AWK on February 20, 2017, 10:04:18 AM

Have you ever heard about so called water glass? How it is made.

And remenber about reading our Forum Rules.

Title: Re: Silicate reactivity
Post by: Yoritomo on February 20, 2017, 10:37:28 AM

Thanks a lot for the fast reply!

      I just read about water glass and its production.Quartz reacting with NaOH.

      Does this mean ANY silicate would react with ANY base?

      I hope I didn't break any rule so far,I tried to find and read the rules,but couldn't...a link would be very useful.

      Thanks a lot!
           -Kostas.

Title: Re: Silicate reactivity
Post by: AWK on February 20, 2017, 01:13:33 PM

Link to Forum Rules is in center at top of the page.
When silicon dioxide and silicates react with strong bases over temperature of base melting (or decomposition to oxides, usually over 800 C) they form at least partially soluble silicates. As bases may be used all compounds that at temperature of reaction decompose to Na₂O or K₂O (Rb, Cs oxides).
Note, liquid HF reacts with silicate groups with evolving of gaseous SiF₄.

Title: Re: Silicate reactivity
Post by: Yoritomo on February 20, 2017, 01:35:16 PM

Thank you so much and please excuse my disorientation in the forum!

The information you are providing is very interesting,but I still feel confused (probably I'm not asking the question properly and clearly-sorry about that!).

So, if I have a silicate (i.e. orthosilicate Titanite – CaTiSiO5 ) in an alkaline solution in room temperature,will it react even microscopically?

Does this depend on whether the base is strong or weak,does it depend on temperature (meaning the occurrence of a reaction,even in molecular level.)?

Title: Re: Silicate reactivity
Post by: AWK on February 20, 2017, 03:06:09 PM

Here is abstract from 2016. the used ammonium fluoride in mild conditions.
https://gsa.confex.com/gsa/2016AM/webprogram/Paper280412.html

Title: Re: Silicate reactivity
Post by: Yoritomo on February 21, 2017, 01:58:38 PM

Thank you SO much AWK!

   Help from other members would be very appreciated!