Concept
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- Preferred Labelskos:prefLabel
silicate chemistry
- URI
- http://resource.geosciml.org/classifier/cgi/compositioncategory/silicate_chemistry ↗Go to the persistent identifier link
- Within Vocab
- Composition Category
| Preferred Labelskos:prefLabel | silicate chemistry |
|---|---|
| Definitionskos:definition | Composed of minerals whose crystal structure contains SiO4 tetrahedra, either isolated or joined through one or more oxygen atoms to form groups, chains, sheets or three-dimensional structures with metallic cations. Composition ranges from 20-100 percent SiO2. Typically some Al substitutues for silica. A survey of chemical analyses in the Georock database (query FOR ALL GEOLOGICAL SETTINGS, MATERIAL: WHOLE ROCK (AND VOLCANIC GLASS), PUB. YEARS: 2005-1970), 10/10/2005, http://georoc.mpch-mainz.gwdg.de/georoc/Entry.html) discovered that the lowest silica (Si02) content for igneous rock is about 20 percent. This is consistent with the lowest silica content found for a silicate mineral is about 21 percent for a chlorite variety found by scanning the mineral analyses in Deer, Howie, and Zussman (1966). |
| Narrowernarrower |
high silica chemistry
intermediate silica chemistry low silica chemistry very low silica chemistry |
| See AlsoseeAlso | Composition Category |
| Is Defined ByisDefinedBy | Composition Category |