The Amphibole Group, A_7-8(Si,Al)₈O₂₂(OH,F,O)₂, where A can be Ca, Mg, Fe, Al, or Na

The density of this mineral is 2800-3700 kg/m3

This group is a group of Mg, Fe, and Ca silicates with different crystal structure of double chain tetrahedral structure. The densities are only slightly less than those of pyroxenes. The amphiboles make up perhaps 7% of Earth's crustal minerals, being common to basic rocks. The rock called Horneblende (Ca,Na,K)2-3(Mg,Fe,,Al)5(Si,,Al)8O22(OH,F)2 is an example of this mineral.

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The Amphibole Group, A_7-8(Si,Al)₈O₂₂(OH,F,O)₂, where A can be Ca, Mg, Fe, Al, or Na

The density of this mineral is 2800-3700 kg/m3

This group is a group of Mg, Fe, and Ca silicates with different crystal structure of double chain tetrahedral structure. The densities are only slightly less than those of pyroxenes. The amphiboles make up perhaps 7% of Earth's crustal minerals, being common to basic rocks. The rock called Horneblende (Ca,Na,K)2-3(Mg,Fe,,Al)5(Si,,Al)8O22(OH,F)2 is an example of this mineral.

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The major types of minerals

Not applicable at this reading level.

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