Cabrerite
Cabrerite is an arsenate mineral bearing magnesium and nickel. It is a member of the hörnesite-annabergite series in the vivianite group.
The name Cabrerite has been in use for any annabergite with notable incorporation of magnesium, typically nickel remaining the dominant ion. It was specified to refer to specimens with a Ni:Mg ratio of 1:2 in 2024.