IMA mineral species

Grandaite

Sr₂Al(AsO₄)₂(OH)

Phosphate mineral.

Grandaite specimen
Piccoliite from the two Italian occurrences (b).png · Wikimedia Commons (see file page for author & license)

Properties

Chemical formulaSr₂Al(AsO₄)₂(OH)
ElementsSr, Al, As, O, H
Crystal systemMonoclinic
Mohs hardness—
Density—
Streak—
Color—
IMA symbolGrd
Nickel–Strunz class8.BG.05

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

🌍 Where it's found

Type locality (where it was first described): Valletta mine, Italy

  • 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.