Found in a boulder of perialkaline granitic pegmatite in moraine. A member of the Osumilite-Milarite group.
Approved IMA 1998 (Dana # Added)
Dara-i-Pioz glacier, Garmsky District, northern Tajikistan. Link to MinDat.org Location Data.
Named after two prominent Russian geologists, Viktor Sergeevitch Shibkov (1926-1992) and Nikolai Viktorovitch Shibkov (1951-1991), who both spent their professional lives working on the geology of Soviet Asia.