Question

chemical properties of rocks?

Answer 1

they are obtained from more minreals

Answer 2

Each individual mineral and rock has a distinct chemical composition which can be written as chemical formula. Except for native elements, minerals are salts composed of positively charged cations (e.g. K+, Na+, Ca++, Fe+++) and negatively charged anionic groups (e.g. CO3, PO4). The list below gives the main mineral groups and examples of each corresponding anionic group.

Silicates are the largest group. About 86% of the earth's volume is silicate. A complex form of other materials often surrounds silicate because of its ability to polymerise. The silicate group has been subdivided into a number of smaller groups using their mineral structures as a basis. These include:

1.Tectosilicates - quartz, feldspars, zeolites
2.Phyllosilicates - micas, serpentines, clays, chlorites
3.Inosilicates - pyroxenes, pyroxinoids
4.Cyclosilicates - tourmalines, beryl
5.Sorosilicates - epidote, vesuvianite
6.Nesosilicates - garnets, olivine, alumino-silicates

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