IMA mineral species

Kircherite

[Na₅Ca₂K](Si₆Al₆O₂₄)(SO₄)₂·0.33H₂O

Tectosilicate mineral.

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

Properties

Chemical formula[Na₅Ca₂K](Si₆Al₆O₂₄)(SO₄)₂·0.33H₂O
ElementsNa, Ca, K, Si, Al, O, S, H
Crystal systemTrigonal
Mohs hardness—
Density—
Streak—
Color—
IMA symbolKcr
Nickel–Strunz class9.FB.05

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

🌍 Where it's found

Type locality (where it was first described): Sacrofano caldera, Italy