Armstrongite
Armstrongite | |
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![]() Armstrongite found in Mongolia | |
General | |
Category | Phyllosilicate |
Formula (repeating unit) | 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] |
Armstrongite (CaZr[Si6O15]·3H2O)[2] is a silicate mineral.
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.
References[]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b Armstrongite on Mindat.org
- ^ Vladykin, N. V.; Kovalenko, V. I.; Kashaev, A. A.; Sapozhnikov, A. N.; Pisarskaya, V. A. (1973). "A new silicate of calcium and zirconium – armstrongite". Doklady Akademii Nauk SSSR. 209: 1185–1188.
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Categories:
- Calcium minerals
- Hydrates
- Phyllosilicates
- Monoclinic minerals
- Zirconium minerals
- Neil Armstrong
- Silicate mineral stubs