releases silica into solution

English translation: formation of these minerals involves loss of silica into water phase

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English term or phrase:releases silica into solution
Selected answer:formation of these minerals involves loss of silica into water phase
Entered by: Mokhtar Nabaleh

20:57 Oct 2, 2016
English language (monolingual) [PRO]
Science - Geology / معادن الطين
English term or phrase: releases silica into solution
For some time the observation has been made that the chemical composition of the upper parts of soil profiles does not follow the accepted alteration scheme which would be produced by simple water - rock alteration.
The interaction of silicates and dilute water (rain) will initially hydrate the minerals present, exchanging hydrogen cations for alkali and alkaline earth cations:
nH+ = Ca2+, K+, etc.
The second step or stage of alteration is the systematic loss of silica.
Most clay minerals are less silica - rich than their precursor tectosilicates (feldspars) and hence the formation of clays such as illite, smectite or kaolinite from these minerals releases silica into solution.
Mokhtar Nabaleh
Egypt
formation of these minerals involves loss of silica into water phase
Explanation:
I think the point gets lost a bit due to poor sentence structure. Silica gets dissolved and drains away.
Selected response from:

Jörgen Slet
Estonia
Local time: 15:55
Grading comment
4 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
4 +5formation of these minerals involves loss of silica into water phase
Jörgen Slet
Summary of reference entries provided
Suspension v solution, depends on particle size
Neil Ashby

  

Answers


4 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +5
formation of these minerals involves loss of silica into water phase


Explanation:
I think the point gets lost a bit due to poor sentence structure. Silica gets dissolved and drains away.

Jörgen Slet
Estonia
Local time: 15:55
Works in field
Native speaker of: Native in EstonianEstonian
PRO pts in category: 8

Peer comments on this answer (and responses from the answerer)
agree  Neil Ashby
7 hrs
  -> thank you:)

agree  Yasutomo Kanazawa
7 hrs
  -> thank you:)

agree  B D Finch
7 hrs
  -> thank you:)

agree  Didier Fourcot: The point is that silica dissolves very little in water: .14g/L at 25°C , .44 at 100°C, so suspension of small particles is more likely, see reference comment
9 hrs
  -> Or a colloid solution. And it does have lots of time.

agree  acetran
13 hrs
  -> thank you:)
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Reference comments


11 hrs peer agreement (net): +2
Reference: Suspension v solution, depends on particle size

Reference information:
During this process, particles dispersed in the liquid phase stick to each other, and spontaneously form irregular particle clusters, flocs, or aggregates. This phenomenon is also referred to as coagulation or flocculation and such a suspension is also called unstable.
https://en.wikipedia.org/wiki/Particle_aggregation

Neil Ashby
Spain
Native speaker of: English

Peer comments on this reference comment (and responses from the reference poster)
agree  Didier Fourcot: For a true solution the particle size is individual molecules, suspension is made of small solid aggregates
1 hr
  -> Thanks Didier, but that's not necessarily true - individual macromolecules can also form suspensions, colloids, gels, glasses, etc.... this is particularly true of biological molecules which are often too large to form solutions.
agree  acetran
6 hrs
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