Selenide of palladium and arsenic, cobaltite group
Specific gravity: 7.59 calculated
Hardness: 4 to 5
Common impurities: Sb,Bi,S
Kalungaite was approved in 2004, but to date (June 2022) it has been reported only from the type locality.
At the type locality, the Buraco do Ouro mine, Cavalcante, Goiás, Brazil, kalungaite occurs in a quartz-muscovite mylonite, related to an aluminium-rich granite, in platy anhedral aggregates along foliation planes. Associated ore minerals are gold, chalcopyrite, bohdanowiczite, an unnamed lead-bismuth-selenium-sulphur mineral, clausthalite, guanajuatite, stibiopalladinite, sperrylite and padmaite. Gangue minerals are muscovite, quartz and rare tourmaline and magnetite.
Kalungaite is interpreted as having formed from hydrothermal fluids of granitic origin, during emplacement shearing and alteration, producing an unusual gold-platinum-group element deposit (MM 70.1.123–130.).
Back to Minerals