Category oxide mineral Strunz classification 4.FL.75 Space group P21/n | Formula
(repeating unit) (Ca,Mg)(Ti,Al)2O4(OH)2 Crystal system Monoclinic | |
Crystal class Prismatic (2/m)
(same H-M symbol) | ||
Cafetite is a rare titanium oxide mineral with formula (Ca,Mg)(Fe,Al)2Ti4O12·4(H2O). It is named for its composition, Ca-Fe-Ti.
It was first described in 1959 for an occurrence in the Afrikanda Massif, Afrikanda, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. It is also reported from the Khibiny and Kovdor massifs of the Kola Peninsula and from Meagher County, Montana, US.
It occurs in pegmatites in a pyroxenite intrusion as crystals in miarolitic cavities. It occurs associated with ilmenite, titaniferous magnetite, titanite, anatase, perovskite, baddeleyite, phlogopite, clinochlore and kassite.
References
Cafetite Wikipedia(Text) CC BY-SA