IMA mineral species

Mountainite

KNa₂Ca₂[Si₈O₁₉(OH)]·6H₂O

Zeolite mineral.

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

Properties

Chemical formulaKNa₂Ca₂[Si₈O₁₉(OH)]·6H₂O
ElementsK, Na, Ca, Si, O, H
Crystal system—
Mohs hardness—
Density—
Streak—
Color—
IMA symbolMtn
Nickel–Strunz class9.GG.10

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

🌍 Where it's found

Type locality (where it was first described): Bultfontein mine, South Africa

  • Type locality
  • Notable source / deposit
  • Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.