Glossary entry (derived from question below)
English term or phrase:
releases silica into solution
English answer:
formation of these minerals involves loss of silica into water phase
Added to glossary by
Mokhtar Nabaleh
Oct 2, 2016 20:57
7 yrs ago
English term
Egypt
releases silica into solution
English
Science
Geology
معادن الطين
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.
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.
Responses
+5
4 hrs
Jörgen Slet
Estonia
Estonia
Works in field
Estonia
19 years of biomedical translation
Native in: Estonian 
Works in: English to Estonian, Estonian to English
Related KudoZ points
:
8
Selected
formation of these minerals involves loss of silica into water phase
I think the point gets lost a bit due to poor sentence structure. Silica gets dissolved and drains away.
4 KudoZ points awarded for this answer.
Reference comments
11 hrs
Neil Ashby
Spain
Spain
Native in English
&
English
Spain
DrNeil TechTrans, Precision & Clarity
Native in: English
Works in: Spanish to English, English
Reference:
Suspension v solution, depends on particle size
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
https://en.wikipedia.org/wiki/Particle_aggregation
Peer comments on this reference comment:
| agree |
Didier Fourcot
: For a true solution the particle size is individual molecules, suspension is made of small solid aggregates
1 hr
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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.
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| agree |
acetran
6 hrs
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