[4] Mills et al. (2011) presented evidence that barbertonite is a polytype of stichtite and should be discredited as a mineral species.
Neighboring brucite layers are stacked so that the hydroxyl ions (OH−) are directly above one another (Taylor, 1973).
[4] Oxygen atoms are accommodated in a single set of sites distributed close to the axes that pass through the hydroxyl ions of adjacent brucite layers (Taylor, 1973).
[4] Barbertonite was first found in the Barberton district in Transvaal, South Africa.
[8] Barbertonite frequently occurs admixed with its rhombohedral analogue and as an alteration product of chromite in serpentinite (Anthony et al.