IMA mineral species

Vernadite

(Mn₄+,Fe³⁺,Ca,Na)(O,OH)₂ * nH₂O

Questionable hydroxyde mineral.

Vernadite specimen
Serrabrancaite in Vernadite - Pedra Lavrada, Paraiba, Brazil.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula(Mn₄+,Fe³⁺,Ca,Na)(O,OH)₂ * nH₂O
ElementsMn, Fe, Ca, Na, O, H
Crystal systemHexagonal
Mohs hardness—
Density—
Streak—
Color—
IMA symbolVnd
Nickel–Strunz class4.FE.40

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