IMA mineral species

Potassic-chloro-hastingsite

KCa₂(Fe²⁺₄Fe³⁺)(Si₆Al₂)O₂₂Cl₂

Ca-amphibole, double chain inosilicate mineral.

Properties

⛏ Mohs hardness4 – 6
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Scratches glass; quartz scratches it.

Chemical formulaKCa₂(Fe²⁺₄Fe³⁺)(Si₆Al₂)O₂₂Cl₂
ElementsK, Ca, Fe, Si, Al, O, Cl
Crystal systemMonoclinic
Mohs hardness4 – 6
Density—
Streak—
Color—
IMA symbolPchst
Nickel–Strunz class9.DE.15

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