IMA mineral species

Poldervaartite

CaCa[SiO₃(OH)](OH)

Nesosilicate mineral.

Poldervaartite specimen — Poldervaartite-de12a.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula	CaCa[SiO₃(OH)](OH)
Elements	Ca, Si, O, H
Crystal system	—
Mohs hardness	—
Density	—
Streak	—
Color	—
IMA symbol	Pdv
Nickel–Strunz class	9.AF.90

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

🌍 Where it's found

Type locality (where it was first described): Wessels 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.

Learn more

Poldervaartite on Mindat.org
Wikidata item Q3907216 (source of this page's data – you can correct it there)