Pegmatite vein consisting of a central ussingitic core surrounded by a zone of mostly microcline and aegirine at the margins, and lies in poikilitic nepheline-sodalite syenite. Hete rophyllosilicate pseudomorphous after
Approved IMA 2003 (Dana # Added)
Alluaiv, Lovozero Massif, Kola, Russia Link to MinDat.org Location Data.
Named to honor analytical chemist Alexandra Vasilyevna Bykova (1917-2001), who first discovered that bornemanite could be transformed to a synthetic form of bykovaite upon treatment with water.