Pyroxenes consist of single chains of linked SiO4 tetrahedra, each of which shares two O atoms with its neighbor; in amphiboles, double chains of the tetrahedra are linked together by O atoms and the tetrahedra share alternately two and three O atoms (Figure 10). The chains are indefinite in length.
Is amphibole a pyroxene?
The difference between Pyroxene and Amphibole is that Pyroxene is a group of inosilicate minerals that forms in metamorphic rocks. In contrast, Amphibole is an inosilicate mineral that forms prisms or needlelike crystals. Pyroxene minerals mainly found in igneous and metamorphic rocks.
What minerals does pyroxene contain?
pyroxene, any of a group of important rock-forming silicate minerals of variable composition, among which calcium-, magnesium-, and iron-rich varieties predominate.
