Sturmanite

Facts

Chemical formula

Ca₆Fe³⁺₂(SO₄)₂.₅[B(OH)₄](OH)₁₂·25H₂O

Crystal system

Trigonal

Mohs hardness

2.5

Elements in formula

Calcium, Iron, Sulfur, Oxygen, Boron, Hydrogen

Number of elements

6

IMA status

Approved

Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q654795