Aphthitalite

Facts

Chemical formula

K₃Na(SO₄)₂

Crystal system

Trigonal

Mohs hardness

3.0

Density

2.75 g/cm³

Elements in formula

Potassium, Sodium, Sulfur, Oxygen

Number of elements

4

IMA status

Grandfathered

Type locality

Mount Vesuvius

Named after

permanence

Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q252287