IMA mineral species

Witzkeite

🪶 Soft, Scratches Easily

Na₄K₄Ca(NO₃)₂(SO₄)₄·2H₂O

Nitrate-sulfate mineral.

Witzkeite specimen — Witzkeite - South slope Punta de Lobos, Tarapacá Region, Chile.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness2

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💅🪙🍶🔪💎

Scratches with a fingernail.

🔷 Monoclinic

Chemical formula	Na₄K₄Ca(NO₃)₂(SO₄)₄·2H₂O
Elements	Na, K, Ca, N, O, S, H
Crystal system	Monoclinic
Mohs hardness	2
Density	—
Streak	—
Color	—
IMA symbol	Wzk

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

Care & Handling

🪶 Soft, Scratches Easily Mohs 2: softer than a steel knife, so it scratches easily. Store it apart from harder stones.

Learn more

Witzkeite on Mindat.org
Wikidata item Q15854907 (source of this page's data – you can correct it there)