Armstrongite (CaZr[Si<sub>6</sub>O<sub>15</sub>]÷3H<sub>2</sub>O) is a silicate mineral.
It was first described in 1973 from an occurrence at Dorozhnyi pegmatite, Khanbogd District, ÃÂmnögovi Province, Mongolia. It was named for the American astronaut Neil Armstrong.