Armstrongite
Phyllosilicate mineral
From Wikipedia, the free encyclopedia
Armstrongite (CaZr[Si6O15]·3H2O)[2] is a silicate mineral.
| Armstrongite | |
|---|---|
Armstrongite found in Mongolia | |
| General | |
| Category | Phyllosilicate minerals |
| Formula | CaZr[Si6O15]·3H2O |
| IMA symbol | Asg[1] |
| Strunz classification | 9.EA.35 |
| Crystal system | Monoclinic |
| Identification | |
| Color | Dark to light brown |
| Cleavage | Perfect on {001}, good on {100} |
| Tenacity | Very brittle |
| Mohs scale hardness | 4.5 |
| Luster | Vitreous |
| Streak | Brownish white |
| Diaphaneity | Translucent |
| References | [2] |
Discovery and occurrence
It was first described in 1973 from an occurrence at Dorozhnyi pegmatite, Khanbogd District, Ömnögovi Province, Mongolia.[3] It was named for the American astronaut Neil Armstrong.
