Building Materials - Engineering

Q1:

Pick up the correct characteristic of Pyroxene from the following:

A It forms octagonal crystals

B It converts to chlorine by hydration

C Its density is 2.3 to 3.6 g/cm2

D Its hardness is 5 to 6

E All the above.

ANS:E - All the above.

The pyroxenes (commonly abbreviated to Px) are a group of important rock-forming inosilicate minerals found in many igneous and metamorphic rocks. Pyroxenes are silicon-aluminum oxides with Ca, Na, Fe, Mg, Zn, Mn, Li substituting for Si and Al.