Extremely rare, though easily overlooked. Only seen in polished section.
Paragenetic and General Notes
Maikainite and ovamboite were described as new minerals and as end-members of a solid solution series in the same paper (Spiridonov, 2003), with both minerals occurring at both Maikain (in Kazakhstan) and at Tsumeb. These two localities should, perhaps, share type locality status for both of these minerals, but the IMA lists Maikain as the type locality for maikainite, and Tsumeb as the type locality for ovamboite.
Maikainite is the Mo-rich end-member, and ovamboite the W-rich end-member (see Jambor and Roberts (2003), for the English abstract). Maikainite occurs as microscopic zones within germanium-rich sulphide assemblages, intergrown with Ovamboite.