IMA mineral species

Armstrongite

CaZr(Si₆O₁₅)·2H₂O

Phyllosilicate mineral.

Brown

Armstrongite specimen
Armstrongite.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formulaCaZr(Si₆O₁₅)·2H₂O
ElementsCa, Zr, Si, O, H
Crystal systemMonoclinic
Mohs hardness—
Density—
Streak—
Colorbrown
Cleavage{001}, {100}
IMA symbolAsg
Nickel–Strunz class9.EA.35

“—” means no reliable value in Wikidata yet. Check Mindat for full data.