Structure of Earth Materials

Amphiboles

Double Chain Ino-Silicates (Amphiboles)

Hornblende: (Na,Ca){{< sub 2 >}}(Mg,Fe,Al){{< sub 5 >}}(Al,Si){{< sub 8 >}}O{{< sub 22 >}}(OH){{< sub 2 >}}. Radiating anthophyllite crystals: (Mg,Fe){{< sub 7 >}}Si{{< sub 8 >}}O{{< sub 22 >}}(OH){{< sub 2 >}}. Fibrous acicular tremolite: Ca{{< sub 2 >}}Mg{{< sub 5 >}}Si{{< sub 8 >}}O{{< sub 22 >}}(OH){{< sub 2 >}}. Fibrous acicular tremolite: Ca{{< sub 2 >}}Mg{{< sub 5 >}}Si{{< sub 8 >}}O{{< sub 22 >}}(OH){{< sub 3 >}}. Intergrown actinolite crystals: Ca{{< sub 2 >}}(Mg,Fe){{< sub 5 >}}Si{{< sub 8 >}}O{{< sub 22 >}}(OH){{< sub 2 >}}.