IMA mineral species

Mallestigite

Pb₃Sb₅+(SO₄)(AsO₄)(OH)₆ * 3H₂O

Sulfate-arsenate mineral.

Mallestigite specimen
Mallestigite - Mallestiger Mittagskogel, Carinthia, Austria.JPG · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness4
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💅🪙🍶🔪💎

A steel knife scratches it, it won't scratch glass.

⚖ Density4.91 g/cm³
Very heavy
Chemical formulaPb₃Sb₅+(SO₄)(AsO₄)(OH)₆ * 3H₂O
ElementsPb, Sb, S, O, As, H
Crystal systemHexagonal
Mohs hardness4
Density4.91 g/cm³
Streak—
Color—
IMA symbolMlg
Nickel–Strunz class7.DF.25

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

🌍 Where it's found

Type locality (where it was first described): Mallestiger Mittagskogel, Austria

  • 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.