IMA mineral species

Walstromite

BaCa₂(Si₃O₉)

Cyclosilicate mineral.

Walstromite specimen — BSE images of paralava with walstromite (B).png · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula	BaCa₂(Si₃O₉)
Elements	Ba, Ca, Si, O
Crystal system	Triclinic
Mohs hardness	—
Density	—
Streak	—
Color	—
IMA symbol	Ws
Nickel–Strunz class	9.CA.25

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

🌍 Where it's found

Type locality (where it was first described): Esquire No. 7 claim, United States

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.

Learn more

Walstromite on Mindat.org
Wikidata item Q4017847 (source of this page's data – you can correct it there)