Crystopedia
IMA mineral species

Allactite

Mn²⁺₇(AsO₄)₂(OH)₈

Arsenate mineral.

RedBrownWhite & Clear

Allactite specimen
Allactite-116056.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formulaMn²⁺₇(AsO₄)₂(OH)₈
ElementsMn, As, O, H
Crystal systemMonoclinic
Mohs hardness4.5
Density—
Streak—
Color—
IMA symbolAla
Nickel–Strunz class8.BE.30

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

🌍 Where it's found

Type locality (where it was first described): Moss mine, Nordmark Odal field, Sweden

  • 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.

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