What is the chemical formula for amphibole?

What is the chemical formula for amphibole?

Chemical composition Numerous common amphiboles can be represented within the Mg7Si8O22(OH)2 (magnesio-anthophyllite)–Fe7Si8O22(OH)2 (grunerite)–“Ca7Si8O22(OH)2” (hypothetical pure calcium amphibole) compositional field (Figure 1). This diagram is commonly referred to as the amphibole quadrilateral.

What is the crystal system of amphibole?

Amphiboles crystallize into two crystal systems, monoclinic and orthorhombic.

What are the elements of amphibole?

The most common elements found in amphibole are H, O, Na, K, Mg, Al, Si, Ca, Mn, and Fe.

How amphibolite is formed?

How Does Amphibolite Form? Amphibolite is a rock of convergent plate boundaries where heat and pressure cause regional metamorphism. It can be produced through the metamorphism of mafic igneous rocks such as basalt and gabbro, or from the metamorphism of clay-rich sedimentary rocks such as marl or graywacke.

What is the silicate structure of amphiboles?

Amphiboles are double chain silicates with general formula A0-1B2C5T8O22(OH,F)2. The double chain consists of (Si, Al)O4 tetrahedrons (T site) linked to form chains with the formula (Si, Al)4O11 that extend infinitely along the long-axis (c-axis) of the mineral.

How is amphibolite formed?

Is amphibole is the same to amphibolite?

Amphibolite is a dark, heavy, metamorphic rock composed mostly of the mineral amphibole. Amphibolites have very little to no quartz. “Amphibole” refers not to a single mineral, but to a group of minerals.

What type of rock is amphibolite?

Amphibolite