IMA mineral species

Manandonite

🪶 Soft, Scratches Easily

Li₂Al₄(Si₂AlB)O₁₀(OH)₈

Phyllosilicate mineral.

Manandonite specimen
Manandonite-20210.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness2.5
12345678910
💅🪙🍶🔪💎

Scratches with a fingernail.

Chemical formulaLi₂Al₄(Si₂AlB)O₁₀(OH)₈
ElementsLi, Al, Si, B, O, H
Crystal systemOrthorhombic
Mohs hardness2.5
Density—
Streak—
Color—
IMA symbolMnd
Nickel–Strunz class9.ED.15

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

Care & Handling

  • 🪶 Soft, Scratches Easily Mohs 2.5: softer than a steel knife, so it scratches easily. Store it apart from harder stones.

🌍 Where it's found

Type locality (where it was first described): Antandrokomby pegmatite, Madagascar