New member of the allanite group found on August 2016 in a very limited portion of the outcrop at Monte Maniglia. Monte Maniglia outcrop is located within the so-called Maniglia-type stratigraphic series, belonging to the Acceglio Zone at an altitude of 3000 meters.
This is the first reported REE-bearing species of this high potential alpine manganese locality in the Cottian Alps. It occurs, very rarely, in very dark red-brown/black subhedral crystals up to 0.5 mm in size in pyroxmangite veins.
It is related to ferriakasakaite-(La) (differing only by the homovalent substitution of Fe3+ with Mn3+) one the three phases belonging to the allanite group approved by IMA in 2012 and 2013 and coming from the Shobu area, Ise City, Mie Prefecture in Japan.
