Clinophosinaite Locality: Rasvumchorr Mt, Khibiny Massif , Kola Peninsula , Murmanskaja Oblast', Northern Region , Russia ( Locality at mindat.org ) Pink/light violet Clinophosinaite. Field of view; 12 mm. Depth of field is achieved with CombineZM. — Photo: Leon Hupperichs · CC BY-SA 3.0
Clinophosinaite
Clinophosinaite is an IMA-recognized mineral species in the silicate class, with the chemical formula Na₃Ca(SiO₃)(PO₄).
It crystallizes in the monoclinic crystal system (space group P2/c).
Key properties: Mohs hardness 4; specific gravity 2.85–2.88; Vitreous luster; optically biaxial.
IMA symbol Cpsi, IMA status: approved, named in 1979.
Apparently as an alteration product of eudialyte in alkalic pegmatites in a differentiated alkalic massif.
It is found associated with Zirsinalite, eudialyte.
The name refers to its monoclinic crystallography and chemical similarity to phosinaite.